阅读说明：本技术 光场和全息波导阵列中的能量的选择性传播 (Selective propagation of energy in optical fields and holographic waveguide arrays ) 是由 J·S·卡拉夫 B·E·比弗森 于 2017-07-14 设计创作，主要内容包括：本申请题为“光场和全息波导阵列中的能量的选择性传播”。所公开的实施例包含一种能量波导系统,所述能量波导系统具有波导阵列和能量抑制元件,所述能量抑制元件配置成大体上填充波导元件孔径并沿着一些能量传播路径通过所述波导阵列选择性地传播能量。在实施例中,此类能量波导系统可以根据4D全光系统限定通过所述波导阵列的能量传播路径。在实施例中,通过所述能量波导系统传播的能量可以包括用于刺激任何感觉受体反应的能量传播,所述感觉受体反应包含视觉、听觉、体感系统,并且所述波导可以并入到全息显示器或聚合双向无缝能量表面中,所述全息显示器或聚合双向无缝能量表面能够通过波导或规定观察体积内的能量汇聚的其它4D全光函数来接收和发射二维光场或全息能量。(The present application is entitled "selective propagation of energy in optical fields and holographic waveguide arrays". Disclosed embodiments include an energy waveguide system having a waveguide array and an energy suppressing element configured to substantially fill a waveguide element aperture and selectively propagate energy through the waveguide array along some energy propagation path. In embodiments, such energy waveguide systems may define an energy propagation path through the waveguide array according to a 4D all-optical system. In embodiments, the energy propagated through the energy waveguide system may include energy propagation to stimulate any sensory receptor response, including visual, auditory, somatosensory systems, and the waveguide may be incorporated into a holographic display or a polymeric bidirectional seamless energy surface capable of receiving and emitting a two-dimensional light field or holographic energy through a waveguide or other 4D plenoptic function that specifies energy concentration within a viewing volume.)

1. An energy waveguide system for defining a plurality of energy propagation paths, comprising:

an array of energy waveguides, the array comprising a first side and a second side and configured to guide energy therethrough along a plurality of energy propagation paths extending through a plurality of energy locations on the first side;

wherein a first subset of the plurality of energy propagation paths extends through a first energy location;

wherein a first energy waveguide is configured to guide energy along a first energy propagation path of the first subset of the plurality of energy propagation paths, the first energy propagation path being defined by a first chief ray formed between the first energy location and the first energy waveguide, and further wherein the first energy propagation path extends from the first energy waveguide toward the second side of the array in a unique direction determined at least by the first energy location; and

wherein energy guided through the first energy waveguide along the first energy propagation path substantially fills a first aperture of the first energy waveguide; and

an energy-suppressing element positioned to limit propagation of energy along a portion of the first subset of the plurality of energy propagation paths that does not extend through the first aperture;

wherein a first portion of the plurality of energy propagation paths extends through a first region and a second portion of the plurality of energy propagation paths extends through a second region, the first and second regions being spaced apart by the energy suppressing element, and wherein the first and second portions of energy propagation paths intersect at the second side of the array.

2. The energy waveguide system of claim 1, wherein the energy suppressing element is located on the first side between the energy waveguide array and the plurality of energy locations.

3. The energy waveguide system of claim 1, wherein the first energy waveguide comprises a two-dimensional spatial coordinate, and wherein the unique direction determined by at least the first energy location comprises a two-dimensional angular coordinate, wherein the 2D spatial coordinate and the 2D angular coordinate form a four-dimensional (4D) coordinate set.

4. The energy waveguide system of claim 3, wherein the energy guided along the first energy propagation path comprises one or more energy rays guided through the first energy waveguide in a direction substantially parallel to the first principal ray.

5. The energy waveguide system of claim 1, wherein energy guided along the first energy propagation path converges with energy guided through a second energy waveguide along a second energy propagation path.

6. The energy waveguide system of claim 5, wherein the first and second energy propagation paths converge at a location on the second side of the array.

7. The energy waveguide system of claim 5, wherein the first and second energy propagation paths converge at a location on the first side of the array.

8. The energy waveguide system of claim 5, wherein the first and second energy propagation paths converge at a location between the first and second sides of the array.

9. The energy waveguide system of claim 1, wherein each energy waveguide comprises a structure for guiding energy, the structure selected from the group consisting of:

a) a structure configured to change an angular direction of energy passing therethrough;

b) a structure comprising at least one numerical aperture;

c) a structure configured to redirect energy away from at least one interior surface;

d) an energy repeater.

10. The energy waveguide system of claim 1, wherein the energy suppression element comprises a structure for attenuating or modifying an energy propagation path, the structure selected from the group consisting of:

a) an energy blocking structure;

b) an element configured to change a first energy propagation path to change a fill factor of the first aperture;

c) a structure configured to limit an angular range of energy proximate to the first energy location.

Technical Field

The present disclosure relates to energy guiding devices, and in particular, to energy waveguides configured to guide energy according to a four-dimensional all-optical system.

Background

The dream of the interactive virtual world in the "holographic deck" room, popularized by Gene Roddenberry, "Star Trek", was originally conceived by the authors Alexander Moszkowski in the beginning of the 20 th century, and it has been a source of inspiration for science fiction and technological innovation for nearly a century. However, this experience does not have a convincing implementation beyond literature, media, and the collective imagination of children and adults.

Disclosure of Invention

An embodiment of an energy waveguide system for defining a plurality of energy propagation paths includes an energy waveguide array including a first side and a second side and configured to direct energy therethrough along a plurality of energy propagation paths extending through a plurality of energy locations on the first side. A subset of the plurality of energy propagation paths may extend through a first energy location.

In an embodiment, a first energy waveguide is configured to guide energy along a first energy propagation path of a first subset of the plurality of energy propagation paths, the first energy propagation path being defined by a first chief ray formed between the first energy location and the first energy waveguide, and further wherein the first energy propagation path extends from the first energy waveguide toward the second side of the array in a unique direction determined at least by the first energy location. Energy guided through the first energy waveguide along the first energy propagation path may substantially fill a first aperture of the first energy waveguide. In an embodiment, the energy waveguide system includes an energy-suppressing element positioned to limit propagation of energy along a portion of the first subset of the plurality of energy propagation paths that does not extend through the first aperture.

In an embodiment, the energy-suppressing element may be located on a first side between the array of energy waveguides and the plurality of energy locations. In an embodiment, the first energy waveguide comprises a two-dimensional spatial coordinate, and wherein the unique direction determined by at least the first energy location comprises a two-dimensional angular coordinate, wherein the 2D spatial coordinate and the 2D angular coordinate form a four-dimensional (4D) coordinate set.

In an embodiment, the energy guided along the first energy propagation path may comprise one or more energy rays guided through the first energy waveguide in a direction substantially parallel to the first chief ray.

In an embodiment, energy guided along the first energy propagation path may converge with energy guided through a second energy waveguide along a second energy propagation path. Further, the first and second energy propagation paths may converge on the second side of the array, on the first side of the array, or between the first and second sides of the array.

Further, the structure of the energy suppression element may be configured to limit the angular range of energy proximate to the first energy location, and may include an energy relay adjacent to the first energy location. Additionally, the energy-suppressing structure may include at least one numerical aperture, and may include a baffle structure. The energy-suppressing structure may be located adjacent to the first energy waveguide and extend generally toward the first energy location, or may be located adjacent to the first energy location and extend generally toward the first energy waveguide.

In embodiments, the array of energy waveguides may be arranged to form a planar surface, or may be arranged to form a curved surface.

Embodiments of an energy waveguide system for defining a plurality of energy propagation paths may include a microlens array including a first side and a second side and configured to direct energy therethrough along a plurality of energy propagation paths extending through a plurality of energy locations. A first subset of the plurality of energy propagation paths extends through a first energy location.

In an embodiment, a first microlens is configured to direct energy along a first energy propagation path of the first subset of the plurality of energy propagation paths, the first energy propagation path being defined by a first chief ray formed between the first energy location and the first microlens, and further wherein the first energy propagation path extends from the first energy waveguide toward the second side of the array in a unique direction determined at least by the first energy location. Energy directed through the first microlens along the first energy propagation path may fill a first aperture of the first microlens.

In an embodiment, the energy waveguide system includes an energy-suppressing element positioned to limit propagation of energy along a portion of the first subset of the plurality of energy propagation paths that does not extend through the first aperture. In embodiments, the waveguide array may be arranged to form a planar surface, or may be arranged to form a curved surface.

In an embodiment, the elements in the waveguide array may be fresnel lenses.

In an embodiment, the shape of the first waveguide may be configured to additionally change the unique direction determined by at least the first energy location.

An embodiment of an energy waveguide system for defining a plurality of energy propagation paths comprises a reflector element comprising: a first reflector on a first side of the reflector element, the first reflector comprising one or more aperture stops formed therethrough; and a second reflector on a second side of the reflector element, the second reflector including one or more aperture stops formed therethrough. The first and second reflectors are configured to direct energy along a plurality of energy propagation paths extending through the aperture stops of the first and second reflectors and a plurality of energy locations on the first side of the reflector element. A first subset of the plurality of energy propagation paths may extend through a first energy location.

In an embodiment, the reflector element is configured to direct energy along a first energy propagation path of the first subset of the plurality of energy propagation paths, the first energy propagation path being defined by a first chief ray formed between the first energy location and a first aperture stop of the first reflector, and further wherein the first energy propagation path extends from a first aperture stop of the second reflector towards the second side of the reflector element in a unique direction determined at least by the first energy location. Energy directed along the first energy propagation path may substantially fill the first aperture stop of the first reflector and the first aperture stop of the second reflector.

In an embodiment, the energy waveguide system includes an energy-suppressing element positioned to limit propagation of energy along a portion of the first subset of the plurality of energy propagation paths that does not extend through the first aperture stop of the first reflector.

In embodiments, the size of the one or more aperture stops of the first and second reflectors may be constant or may vary.

In an embodiment, the first and second reflectors comprise one or more parabolas, such that the first paraboloid of the first reflector and the first paraboloid of the second reflector are configured to reflect energy along the first energy propagation path. The focal length of the first paraboloid of the first reflector may be the same as the focal length of the first paraboloid of the second reflector or may be different from the focal length of the first paraboloid of the second reflector.

In an embodiment, an additional energy suppressing element may be located between the first and second sides of the reflector element.

In an embodiment, the energy waveguide system propagates energy bi-directionally.

In an embodiment, the energy waveguide is configured to propagate mechanical energy

In an embodiment, the energy waveguide is configured to propagate electromagnetic energy.

In embodiments, the energy waveguide is configured to simultaneously propagate mechanical, electromagnetic, and/or other forms of energy.

In an embodiment, the energy waveguide propagates energy at different ratios of u and v, respectively, within the 4D coordinate system.

In an embodiment, the energy waveguide propagates energy as a composite function.

In an embodiment, the energy waveguide comprises a plurality of elements along said energy propagation path.

In an embodiment, the energy waveguide is formed directly from the fiber optic repeater polished surface.

In an embodiment, the energy waveguide system comprises a material exhibiting lateral anderson localization.

In an embodiment, the energy suppression element is configured to suppress electromagnetic energy.

In an embodiment, the energy suppression element is configured to suppress mechanical energy.

In embodiments, the energy suppression element is configured to suppress mechanical energy, electromagnetic energy, and/or other forms of energy.

These and other advantages of the present disclosure will become apparent to those skilled in the art from the following detailed description and the appended claims.

Drawings

FIG. 1 is a schematic diagram illustrating design parameters for an energy guiding system;

FIG. 2 is a schematic diagram illustrating an energy system with a mechanical enclosure having an active device region;

FIG. 3 is a schematic diagram illustrating an energy repeater system;

FIG. 4 is a schematic diagram illustrating an embodiment of energy repeater elements bonded together and secured to a base structure;

FIG. 5A is a schematic diagram illustrating an example of an image relayed through a multicore fiber;

FIG. 5B is a schematic diagram illustrating an example of an image relayed by an optical relay having characteristics of the lateral Anderson localization principle;

FIG. 6 is a schematic diagram showing light rays propagating from an energy surface to a viewer;

FIG. 7 illustrates a top-down perspective view of an embodiment of an energy waveguide system that may be used to define multiple energy propagation paths;

FIG. 8 illustrates a front perspective view of the embodiment shown in FIG. 7;

FIGS. 9A-H illustrate various embodiments of energy-suppressing elements;

FIG. 10 illustrates another embodiment of an energy waveguide system;

FIG. 11 illustrates another embodiment of an energy waveguide system;

FIG. 12 highlights the differences between square, hexagonal and irregular packaging for energy waveguide design considerations;

FIG. 13 illustrates an embodiment having an array of energy waveguides arranged in a curved configuration;

FIG. 14 illustrates an embodiment highlighting how a waveguide element can affect the spatial distribution of energy passing therethrough;

FIG. 15 illustrates another embodiment that further highlights how the waveguide elements can affect the spatial distribution of energy passing therethrough;

FIG. 16 illustrates an embodiment in which multiple energy waveguides include diffractive waveguide elements;

FIG. 17 illustrates a microlens configuration for providing full intensity illumination of light for a desired viewing angle.

Detailed Description

Embodiments of the holographic deck (collectively, "holographic deck design parameters") provide energy stimuli sufficient to confuse human sensory receptors to believe that energy pulses received within virtual, social, and interactive environments are realistic, providing: 1) binocular parallax without external accessories, head-worn glasses, or other peripherals; 2) exact motion parallax, occlusion and opacity throughout the view volume for any number of viewers at the same time; 3) a visual focus for synchronous convergence, accommodation and miosis of all perceived light by the eye; and 4) converging energy wave propagation with sufficient density and resolution to exceed the human sensory "resolution" of vision, hearing, touch, taste, smell, and/or balance.

Based on conventional techniques to date, we are able to achieve all of the receptive fields in a convincing way as proposed by holographic deck design parameters (including vision, hearing, somatosensory, taste, smell and vestibular systems) for decades or even centuries.

In the present disclosure, the terms light field and hologram are used interchangeably to define energy propagation for stimulating any sensory receptor response. Although the initial disclosure may refer to examples of electromagnetic and mechanical energy propagation through holographic images and stereotactual energy surfaces, all forms of sensory receptors are contemplated in this disclosure. Furthermore, the principles of energy propagation along a propagation path disclosed herein may be applied to energy emission and energy capture.

Many of the technologies that exist today are often unfortunately confused with holograms, including lenticular printing, Pepper's Ghost, glasses-free stereoscopic displays, horizontal parallax displays, head-mounted VR and AR displays (HMDs), and other such ghosts summarized as "fitting glasses". These techniques may exhibit some of the desirable characteristics of a true holographic display, but they fail to stimulate human visual responses in any manner sufficient to achieve at least two of the four identified holographic deck design parameters.

Conventional techniques have not successfully achieved these challenges to produce a seamless energy surface sufficient for holographic energy propagation. There are various approaches to implementing stereoscopic and directionally multiplexed light field displays, including parallax barriers, hogels, voxels, diffractive optics, multi-view projection, holographic diffusers, rotating mirrors, multi-layer displays, time sequential displays, head mounted displays, etc., but conventional approaches may involve impairments to image quality, resolution, angular sampling density, size, cost, security, frame rate, etc., which ultimately makes the technology unfeasible.

To implement the holographic deck design parameters of visual, auditory, and somatosensory systems, the human acuity of each of the respective systems needs to be studied and understood to propagate energy waves in order to sufficiently confuse human sensory receptors. The visual system can resolve roughly 1 arc minute, the auditory system can distinguish position differences as small as three degrees, and the somatosensory system of the hand can distinguish points separated by 2-12 mm. While the ways of measuring these acuity are various and contradictory, these values are sufficient to understand the systems and methods of perception of the propagation of stimulation energy.

Among the mentioned sensory receptors, the human visual system is by far the most sensitive, since even a single photon can induce a sensation. For this reason, much of this introduction will focus on visual energy wave propagation, and a much lower resolution energy system coupled within the disclosed energy waveguide surface can converge appropriate signals to induce holographic perceptual perception. Unless otherwise indicated, all disclosures apply to all energy and sensory domains.

In calculating the effective design parameters for energy propagation for a vision system given the viewing volume and viewing distance, the desired energy surface can be designed to include an effective energy location density of gigapixels. For wide-view or near-field viewing, design parameters for a desired energy surface may include an effective energy location density of hundreds of gigapixels or more. In contrast, the desired energy source may be designed to have 1 to 250 effective megapixels of energy position density for ultrasonic propagation of the stereophonic sensation, or an array of 36 to 3,600 effective energy positions for acoustic propagation of the holographic sound, depending on the input environmental variables. It is important to note that with the disclosed bi-directional energy surface architecture, all components can be configured to form structures suitable for any energy domain to achieve holographic propagation.

However, the main challenge of current implementations of holographic decks relates to the limitations of available visual technology and electromagnetic devices. Acoustic and ultrasonic devices are less challenging in view of the magnitude difference in the desired density based on the sensory acuity in the respective receptive fields, but the complexity should not be underestimated. While holographic emulsions exist that have resolutions exceeding the desired density to encode the interference patterns in the static image, prior art display devices suffer from limitations in resolution, data throughput, and manufacturing feasibility. To date, no single display device has been able to meaningfully generate a light field with near holographic resolution of visual acuity.

The production of a single silicon-based device capable of meeting the desired resolution of a convincing light field display may be impractical and may involve extremely complex manufacturing processes beyond the current manufacturing capabilities. Limitations on tiling multiple existing display devices together involve gaps and voids formed by the physical size of the packages, electronics, housings, optics, and several other challenges that inevitably lead to technical infeasibility from an imaging, cost, and/or size perspective.

Embodiments disclosed herein may provide a realistic path to build a holographic deck.

Example embodiments will now be described hereinafter with reference to the accompanying drawings, which form a part hereof and illustrate example embodiments that may be practiced. As used in this disclosure and the appended claims, the terms "embodiment," "example embodiment," and "exemplary embodiment" do not necessarily refer to a single embodiment, but they may refer to a single embodiment, and the various example embodiments may be readily combined and interchanged without departing from the scope or spirit of the example embodiments. Furthermore, the terminology used herein is for the purpose of describing various example embodiments only and is not intended to be limiting. In this regard, as used herein, the terms "in … …" may include "in … …" and "on … …," and the terms "a," "an," and "the" may include both singular and plural references. Additionally, as used herein, the term "by" may also mean "from" in accordance with the context. Further, as used herein, the term "if" may also mean "when … …" or "when … …" depending on the context. Further, as used herein, the word "and/or" may refer to and encompass any and all possible combinations of one or more of the associated listed items.

Holographic system considerations:

overview of light field energy propagation resolution

Light fields and holographic displays are the result of multiple projections, where energy surface locations provide angular, color, and brightness information that propagates within the viewing volume. The disclosed energy surface provides the opportunity for additional information to co-exist and propagate through the same surface to induce other sensory system responses. Unlike stereoscopic displays, the observed position of the focused energy propagation path in space does not change as the observer moves around in the viewing volume, and any number of observers can see the propagated object in real space at the same time as if it were really in real space. In some embodiments, the propagation of energy may be located in the same energy propagation path, but in opposite directions. For example, in some embodiments of the present disclosure, both energy emission and energy capture along the energy propagation path are possible.

FIG. 1 is a schematic diagram illustrating variables associated with stimulation of sensory receptor responses. These variables may include surface diagonal 01, surface width 02, surface height 03, determined target seat distance 18, target seat field of view from the center of display 04, number of intermediate samples shown herein as samples between eyes 05, average adult interocular spacing 06, average resolution 07 of human eyes in arc minutes, horizontal field of view 08 formed between target observer position and surface width, vertical field of view 09 formed between target observer position and surface height, resulting horizontal waveguide element resolution or total number of elements on surface 10, resulting vertical waveguide element resolution or total number of elements on surface 11, sample distance 12 based on the number of intermediate samples of interocular spacing between eyes and angular projection between eyes. The angular sampling may be based on the sample distance and target seat distance 13, the total resolution per waveguide element horizon 14 derived from the desired angular sampling, and the total resolution per waveguide element Vertical 15 derived from the desired angular sampling. The device horizon is a count 16 of the determined number of desired precision energy sources and the device Vertical is a count 17 of the determined number of desired precision energy sources.

One way to understand the desired minimum resolution can be to ensure adequate stimulation of the visual (or other) sensory receptor response based on the following criteria: surface size (e.g., 84 "diagonal), surface aspect ratio (e.g., 16:9), seat distance (e.g., from display 128"), seat field of view (e.g., 120 degrees or +/-60 degrees around the center of the display), desired intermediate samples at a distance (e.g., one additional propagation path between the eyes), average interocular spacing for adults (approximately 65mm), and average resolution for the human eye (approximately 1 arc minute). These instance values should be treated as placeholders depending on the application-specific design parameters.

In addition, each of these values attributed to the visual perception receptors may be replaced by other systems to determine the desired propagation path parameters. For other energy propagation embodiments, the angular sensitivity of the auditory system down to three degrees, and the spatial resolution of the somatosensory system down to 2-12mm of the hand, may be considered.

Although the methods of measuring these sensory acuity are various and contradictory, these values are sufficient to understand the systems and methods that stimulate the perception of virtual energy propagation. There are many ways to consider design resolution, and the approach presented below combines practical product considerations with the biological resolution limit of sensory systems. As will be appreciated by those of ordinary skill in the art, the following summary is a simplification of any such system design and should be considered for exemplary purposes only.

Given the resolution limits of the sensory system, the total energy waveguide element density can be calculated such that the receiving sensory system cannot distinguish a single energy waveguide element from neighboring elements, given the following equation:

·

·

·

·

·

·

·

the above calculations result in an approximately 32x18 ° field of view, resulting in the desired approximately 1920x1080 (rounded to nearest format) energy waveguide element. The variables may also be constrained such that the field of view is consistent for (u, v), providing more regular spatial sampling of energy locations (e.g., pixel aspect ratio). Angular sampling of the system takes a defined target view volume position and an additional propagation energy path between two points at an optimized distance, given the following equation:

·

·

in this case, the sample distance is calculated using the inter-eye distance, but an appropriate number of samples may be regarded as a given distance using any metric. In view of the above variables, one ray may be required approximately every 0.57 °, and given the following equation, the total system resolution per independent sensory system may be determined:

·

total resolution H ═ N × horizontal element resolution

Total resolution V ═ N × vertical element resolution

In the above case, given the size of the energy surface and the angular resolution achieved by the visual acuity system, the resulting energy surface may ideally contain energy resolution locations of approximately 400k x 225k pixels, or a holographic propagation density of 90 gigapixels. These variables are provided for exemplary purposes only, and many other sensory and energy metering considerations should be considered to optimize the holographic propagation of energy. In another embodiment, based on input variables, an energy resolution position of 1 gigapixel may be required. In another embodiment, based on input variables, an energy resolution position of 1,000 gigapixels may be required.

The current technical limitations are as follows:

active area, device electronics, packaging and mechanical enclosure

Fig. 2 illustrates a device 20 having an active region 22 with specific mechanical aspect dimensions. The apparatus 20 may include a driver 23 and electronics 24 for powering and interfacing to an active region 22 having dimensions as shown by the x and y arrows. This device 20 does not take into account the wiring and mechanical structure for the drive, power and cooling components, and the mechanical footprint can be further minimized by introducing flex cables into the device 20. The minimum footprint of such a device 20 may also be referred to as a mechanical enclosure 21 having dimensions as shown by the M: x and M: y arrows. This apparatus 20 is for illustration purposes only, and custom electronics design may further reduce mechanical housing overhead, but may not be the exact size of the active area of the apparatus in almost all cases. In an embodiment, this apparatus 20 illustrates the dependence of the electronic device on its active image area 22 with respect to micro-OLEDs, DLP chips or LCD panels or any other technology whose purpose is image illumination.

In some embodiments, other projection techniques that aggregate multiple images onto a larger, monolithic display are also contemplated. However, these techniques may come at the expense of greater complexity in standoff distance, shortest focus, optical quality, uniform field resolution, chromatic aberration, thermal characteristics, calibration, alignment, extra size, or apparent size. Hosting tens or hundreds of these projection sources 20 may result in a much larger and less reliable design for most practical applications.

Assuming, for exemplary purposes only, an energy device with an energy location density of 3840x 2160 sites, given the following equation, the number of individual energy devices (e.g., device 10) required for an energy surface may be determined:

·

·

in view of the above resolution considerations, approximately 105x105 devices similar to those shown in fig. 2 may be required. It should be noted that many devices are composed of various pixel structures, which may or may not be mapped onto a regular grid. These may be used to generate additional resolution or angular density where there are additional sub-pixels or locations within each full pixel. Additional signal processing may be used to determine how to convert the light field to the correct (u, v) coordinates depending on the specified position of the pixel structure, and may be an explicit feature of each device that is known and calibrated. In addition, other energy domains may involve different treatment of these ratios and device structures, and one skilled in the art will understand the direct intrinsic relationship between each of the desired frequency domains. This will be shown and discussed in more detail in the subsequent disclosure.

The resulting calculations can be used to understand how many of these individual devices may be needed to produce a full resolution energy surface. In this case, reaching the visual acuity threshold may require approximately 105x105 or approximately 11,080 devices. Creating a seamless energy surface from these available energy locations for adequate sensory holographic propagation presents challenges and novelty.

Seamless energy surface overview:

configuration and design of energy repeater arrays

In some embodiments, methods are disclosed that achieve the challenge of seamlessly generating high energy site densities from an array of individual devices due to limitations of the mechanical structure of the devices. In embodiments, the energy propagating repeater system may allow the effective size of the active device area to be increased to meet or exceed the mechanical dimensions, configuring the repeater array and forming a single seamless energy surface.

Fig. 3 illustrates an embodiment of such an energy repeater system 30. As shown, the repeater system 30 may include a device 31 mounted to a mechanical housing 32, with an energy repeater element 33 propagating energy from the device 31. The repeater element 33 may be configured to have the ability to reduce any gaps 34 that may be created when multiple mechanical housings 32 of a device are placed into an array of multiple devices 31.

For example, if the active area 310 of the device is 20mm x10 mm and the mechanical housing 32 is 40mm x20mm, the energy repeater elements 33 can be designed with a 2:1 magnification to produce a tapered form of approximately 20mm x10 mm on the reduced end (arrow a) and 40mm x20mm on the enlarged end (arrow B), providing the ability to seamlessly align the array of these elements 33 together without altering the mechanical housing 32 of each device 31 or colliding with the mechanical housing 32. Mechanically, the relay elements 33 may be bonded or fused together for alignment and polishing to ensure a minimum of gap spacing 34 between the devices 31. In one such embodiment, it is possible to achieve a gap 34 that is less than the visual acuity limit of the eye.

Fig. 4 illustrates an example of a base structure 400 having energy relay elements 410 formed together and securely fastened to an additional mechanical structure 430. The mechanical structure of the seamless energy surface 420 provides the ability to serially couple multiple energy relay elements 410, 450 to the same base structure through other mechanical processes that incorporate or install the relay elements 410, 450. In some embodiments, each repeater element 410 may be fused, bonded, glued, press fit, aligned, or otherwise attached together to form the resulting seamless energy surface 420. In some embodiments, the device 480 may be mounted onto the rear of the repeater element 410 and passively or actively aligned to ensure proper energy positional alignment is maintained within a determined tolerance.

In an embodiment, the seamless energy surface comprises one or more energy locations and the one or more energy relay element stacks comprise first and second sides, and each energy relay element stack is arranged to form a single seamless display surface, thereby directing energy along a propagation path extending between the one or more energy locations and the seamless display surface, wherein a spacing between edges of any two adjacent second sides of the terminal energy relay elements is less than a minimum perceivable profile as defined by the visual acuity of a human eye with vision better than 20/40 at a distance greater than a width of the single seamless display surface.

In an embodiment, each of the seamless energy surfaces comprises one or more energy relay elements, each energy relay element having one or more structures forming first and second surfaces with a transverse and longitudinal orientation. The first repeater surface has a different area than the second repeater surface, resulting in either positive or negative power, and is configured with a well-defined surface profile for the first and second surfaces to transfer energy through the second repeater surface, substantially filling an angle of +/-10 degrees relative to a normal to the surface profile across the second repeater surface.

In embodiments, multiple energy domains may be configured within a single energy relay or between multiple energy relays to direct one or more sensory holographic energy propagation paths including visual, acoustic, tactile, or other energy domains.

In an embodiment, the seamless energy surface is configured with an energy repeater comprising two or more first sides for each second side to simultaneously receive and transmit one or more energy domains, thereby providing bidirectional energy propagation throughout the system.

In an embodiment, an energy repeater is provided as a loose coherent element.

Introduction of the component engineering structure:

open development of transverse Anderson localized energy repeater

The characteristics of the energy repeater can be significantly optimized according to the principles disclosed herein for energy repeater elements inducing lateral anderson localization. Transverse anderson localization is the propagation of light transmitted through a transversely disordered but longitudinally uniform material.

This means that the effect of the material producing the anderson localization phenomenon may be less affected by total internal reflection than randomization between multiple scattering paths where wave interference may completely limit propagation in the transverse orientation as it continues in the longitudinal orientation.

The most significant additional benefit is the removal of the cladding of conventional multi-core fiber materials. The cladding is to functionally eliminate scattering of energy between fibers, but at the same time acts as a barrier to energy rays, thereby reducing transmission at least by the core coverage ratio (e.g., core coverage ratio 70:30 will transmit up to 70% of the received energy transmission), and additionally forms a strongly pixilated pattern in the propagating energy.

Fig. 5A illustrates an end view of an example of such a non-anderson localized energy repeater 500, where the image is repeated through a multi-core fiber, where pixelation and fiber noise may be exhibited due to the inherent characteristics of the fiber. For conventional multimode and multicore fibers, the relayed image may be pixelated in nature due to the nature of total internal reflection of a dispersed array of cores, where any crosstalk between cores will reduce the modulation transfer function and increase the blur. The resulting images produced with conventional multi-core fibers tend to have residual fixed noise fiber patterns similar to those shown in fig. 3.

Fig. 5B illustrates an example of the same image 550 relayed by an energy relay comprising a material having the property of lateral anderson localization, wherein the relayed pattern has a greater density of grain structures than the fixed fiber pattern of fig. 5A. In an embodiment, a repeater comprising a randomized microscopic component engineered structure induces lateral anderson localization and transmits light more efficiently with higher resolvable resolution of the propagation compared to commercially available multimode glass fibers.

The lateral anderson localized material properties are uniformly significant in both cost and weight, where the cost and weight of similar optical grade glass materials may be 10 to 100 times higher than the cost of the same materials generated within an embodiment, where the disclosed systems and methods include randomized microscopic component engineered structures, which have a number of opportunities to improve cost and quality over other techniques known in the art.

In an embodiment, a repeater element exhibiting transverse anderson localization may comprise a plurality of at least two different component engineered structures in each of three orthogonal planes arranged in a three-dimensional grid, and the plurality of structures form a channel of randomized distribution of material wave propagation properties in transverse planes within the three-dimensional grid and similar values of material wave propagation properties in longitudinal planes within the three-dimensional grid, wherein localized energy waves propagating through the energy repeater have higher transmission efficiency in the longitudinal orientation than in the transverse orientation.

In embodiments, multiple energy domains may be configured within a single transverse anderson localized energy repeater or between multiple transverse anderson localized energy repeaters to direct one or more sensory holographic energy propagation paths including visual, acoustic, tactile, or other energy domains.

In an embodiment, the seamless energy surface is configured with a transverse anderson localized energy repeater comprising two or more first sides for each second side to simultaneously receive and transmit one or more energy domains, thereby providing bidirectional energy propagation throughout the system.

In an embodiment, the transverse anderson localized energy repeaters are configured as loosely coherent or flexible energy repeater elements.

Considerations for 4D plenoptic function:

selective propagation of energy through holographic waveguide array

As discussed above and herein, light field display systems generally include an energy source (e.g., an illumination source) and a seamless energy surface configured with sufficient energy location density, as set forth in the discussion above. Multiple repeater elements may be used to repeat energy from the energy device to the seamless energy surface. Once energy is delivered to a seamless energy surface with the requisite energy location density, the energy can propagate through the disclosed energy waveguide system according to a 4D plenoptic function. As will be appreciated by those of ordinary skill in the art, 4D plenoptic functions are well known in the art and will not be further detailed herein.

An energy waveguide system selectively propagates energy through a plurality of energy locations along a seamless energy surface representing spatial coordinates of a 4D plenoptic function, wherein the structure is configured to change an angular direction of energy waves passing therethrough, the angular direction representing an angular component of the 4D plenoptic function, wherein the propagated energy waves can converge in space according to a plurality of propagation paths guided by the 4D plenoptic function.

Referring now to fig. 6, fig. 6 illustrates an example of a light-field energy surface in 4D image space according to a 4D plenoptic function. This figure shows the ray trace from the energy surface 600 to the viewer 620, which describes how the energy rays converge in the space 630 from various locations within the viewing volume. As shown, each waveguide element 610 defines four information dimensions describing energy propagation 640 through the energy surface 600. The two spatial dimensions (referred to herein as x and y) are the physical multiple energy positions that can be observed in image space, the angular components θ and(referred to herein as u and v) can be observed in virtual space when projected through an array of energy waveguides. In general, according to the 4D plenoptic function, in forming the holographic or light field systems described herein, a plurality of waveguides (e.g., microlenses) are capable of guiding energy positions from x, y dimensions to unique positions in virtual space along directions defined by u, v angular components.

However, those skilled in the art will appreciate that the significant challenges of light field and holographic display techniques stem from uncontrolled energy propagation, as the design does not accurately account for any of the following: diffraction, scattering, diffusion, angular orientation, collimation, focus, collimation, curvature, uniformity, element cross-talk, and a number of other parameters that contribute to reduced effective resolution and inability to accurately focus energy with sufficient fidelity.

In an embodiment, a method for achieving selective energy propagation of challenges associated with holographic displays may include an energy suppression element and a substantially filled waveguide aperture, with near-collimated energy entering an environment defined by a 4D plenoptic function.

In an embodiment, the energy waveguide array may define, for each waveguide element, a plurality of energy propagation paths configured to extend through and substantially fill an effective aperture of the waveguide element in a unique direction defined by a 4D function specified for a plurality of energy positions along the seamless energy surface, the plurality of energy positions being suppressed by one or more elements positioned to limit propagation of each energy position to only a single waveguide element.

In embodiments, multiple energy domains may be configured within a single energy waveguide or between multiple energy waveguides to guide one or more sensory holographic energy propagations including visual, acoustic, tactile, or other energy domains.

In an embodiment, the energy waveguide and the seamless energy surface are configured to receive and transmit one or more energy domains to provide bidirectional energy propagation throughout the system.

In embodiments, the energy waveguides are configured to propagate a non-linear or irregular distribution of energy, including non-transmission interstitial regions, with digitally encoded, diffractive, refractive, reflective, grin, holographic, Fresnel (Fresnel), etc. waveguide configurations for any seamless energy surface orientation including walls, tables, floors, ceilings, rooms or other geometry based environments. In another embodiment, the energy waveguiding element may be configured to produce various geometries that provide any surface contour and/or desktop navigation to enable a user to view holographic images from various locations of the energy surface in a 360 degree configuration.

In embodiments, the energy waveguide array elements may be reflective surfaces, and the arrangement of the elements may be hexagonal, square, irregular, semi-regular, curved, non-planar, spherical, cylindrical, tilted regular, tilted irregular, spatially varying, and/or multilayered.

For any component within the seamless energy surface, the waveguide or repeater component may include, but is not limited to, an optical fiber, silicon, glass, polymer, optical repeater, diffractive, holographic, refractive or reflective element, optical panel, energy combiner, beam splitter, prism, polarizing element, spatial light modulator, active pixel, liquid crystal cell, transparent display, or any similar material that exhibits anderson localization or total internal reflection.

Realize holographic deck:

polymerization of bi-directional seamless energy surface system for stimulation of human sensory receptors within holographic environment

It is possible to build a large environment of seamless energy surface systems, including an entire room, by tiling, fusing, joining, attaching and/or splicing together multiple seamless energy surfaces to form any size, shape, contour or apparent dimension. Each energy surface system may include an assembly having a base structure, an energy surface, a relay, a waveguide, a device, and electronics collectively configured for bi-directional holographic energy propagation, emission, reflection, or sensing.

In an embodiment, the environments of a tiled seamless energy system are aggregated to form a large seamless planar or curved wall comprising facilities including up to all surfaces in a given environment, and configured in any combination of seamless, discontinuous planar, faceted, curved, cylindrical, spherical, geometric, or irregular geometric structures.

In an embodiment, for drama or venue-based holographic entertainment, a collective tile of planar surfaces forms a wall-sized system. In an embodiment, for a cave-based holographic facility, a flat-surfaced aggregate tile covers a room having four to six walls, including a ceiling and a floor. In an embodiment, for an immersive holographic facility, the aggregated tiles of curved surfaces create a cylindrical seamless environment. In an embodiment, for a holographic deck based immersive experience, the aggregated tiles of the seamless spherical surface form a holographic dome.

In an embodiment, the polymeric tiles of seamless curved energy waveguides provide mechanical edges along the boundaries of the energy suppressing elements within the energy waveguide structure in a precise pattern to bond, align, or fuse adjacent tiled mechanical edges of adjacent waveguide surfaces, thereby creating a modular seamless energy waveguide system.

In another embodiment of the aggregated tiled environment, energy is propagated bi-directionally for multiple simultaneous energy domains. In another embodiment, the energy surface provides the ability to be displayed and captured simultaneously from the same energy surface, wherein the waveguide is designed such that light field data can be projected by the illumination source through the waveguide and received simultaneously through the same energy surface. In another embodiment, additional depth sensing and active scanning techniques can be utilized to enable energy propagation and interaction between observers in the correct world coordinates. In another embodiment, the energy surface and waveguide may be used to transmit, reflect, or focus frequencies to induce haptic sensations or volumetric haptic feedback. In some embodiments, any combination of bidirectional energy propagation and converging surfaces is possible.

In an embodiment, a system includes an energy waveguide capable of bi-directionally emitting and sensing energy through an energy surface, where one or more energy devices are independently paired with two or more path energy combiners to pair at least two energy devices to the same portion of a seamless energy surface, or one or more energy devices are fixed behind an energy surface and near an additional component fixed to a base structure, or near a location in front of and outside the FOV of a waveguide used for off-axis direct or reflected projection or sensing, and the resulting energy surface enables bi-directional transmission of energy, enabling the waveguide to concentrate energy, a first device capable of emitting energy, a second device capable of sensing energy, and where information is processed to perform computer vision related tasks, including but not limited to tracking or sensing of interference within a propagating energy pattern by a 4D plenoptic eye and retina, Depth estimation, proximity, motion tracking, image, color or sound formation, or other energy frequency analysis. In another embodiment, the tracked position is actively calculated and the energy position is corrected based on interference between the bi-directionally captured data and the projection information.

In some embodiments, multiple combinations of three energy devices including an ultrasonic sensor, a visible electromagnetic display, and an ultrasonic transmitting device are collectively configured for each of three first repeater surfaces of propagating energy combined into a single second energy repeater surface, wherein each of the three first surfaces includes engineered properties specific to an energy domain of each device, and two engineered waveguide elements are configured for ultrasonic and electromagnetic energy, respectively, to provide the ability to independently guide and concentrate the energy of each device, and are substantially unaffected by other waveguide elements configured for separate energy domains.

In some embodiments, a calibration procedure is disclosed that enables efficient manufacturing to remove system artifacts and produce a geometric mapping of the resulting energy surface for use with encoding/decoding techniques, and an application specific integration system for converting data into calibration information suitable for energy propagation based on a calibration profile.

In some embodiments, an additional energy waveguide and one or more energy devices in series may be integrated into the system to produce opaque holographic pixels.

In some embodiments, additional waveguide elements including energy suppression elements, beam splitters, prisms, active parallax barriers, or polarization techniques may be integrated in order to provide spatial and/or angular resolution greater than the waveguide diameter or for other super-resolution purposes.

In some embodiments, the disclosed energy system may also be configured as a wearable two-way device, such as a Virtual Reality (VR) or Augmented Reality (AR). In other embodiments, the energy system may include an adjustment optical element that focuses the displayed or received energy near a determined plane in space of the observer. In some embodiments, the waveguide array may be incorporated into a holographic head mounted display. In other embodiments, the system may include multiple optical paths to enable an observer to see the energy system and the real world environment (e.g., a transparent holographic display). In these cases, the system may appear to be near-field, among other methods.

In some embodiments, the transmission of data includes an encoding process with a selectable or variable compression ratio that receives an arbitrary data set of information and metadata; analyzing the data set and receiving or assigning material properties, vectors, surface IDs, new pixel data to form a more sparse data set, and wherein the received data may comprise: 2D, stereo, multi-view, metadata, light field, holographic, geometry, vector, or vectorized metadata, and the encoder/decoder may provide the capability to transform the data, including image processing, in real-time or offline for: 2D; 2D plus depth, metadata, or other vectorized information; stereo, stereo plus depth, metadata, or other vectorized information; a plurality of views; multi-view plus depth, metadata, or other vectorized information; holography; or light field content; by a depth estimation algorithm with or without depth metadata; and the inverse ray tracing method maps the resulting transformed data generated by inverse ray tracing of the various 2D, stereo, multi-view, stereo, light-field or holographic data into real world coordinates in an appropriate manner by characterizing the 4D plenoptic function. In these embodiments, the total data transmission required may be many orders of magnitude less transmitted information than the original light field data set.

Selective propagation of energy in optical fields and holographic waveguide arrays

Fig. 7 illustrates a top-down perspective view of an embodiment of an energy waveguide system 100 that may be used to define multiple energy propagation paths 108. The energy waveguide system 100 includes an energy waveguide array 112 configured to guide energy therethrough along the plurality of energy propagation paths 108. In an embodiment, the plurality of energy propagation paths 108 extend through a plurality of energy locations 118 on a first side 116 of the array to a second side 114 of the array.

Referring to fig. 7 and 9H, in an embodiment, a first subset 290 of the plurality of energy propagation paths 108 extends through the first energy location 122. The first energy waveguide 104 is configured to guide energy along a first energy propagation path 120 in a first subset 290 of the plurality of energy propagation paths 108. The first energy propagation path 120 may be defined by a first chief ray 138 formed between the first energy location 122 and the first energy waveguide 104. The first energy propagation path 120 may include light rays 138A and 138B formed between the first energy location 122 and the first energy waveguide 104, the light rays 138A and 138B being guided by the first energy waveguide 104 along the energy propagation paths 120A and 120B, respectively. A first energy propagation path 120 may extend from the first energy waveguide 104 toward the second side 114 of the array. In an embodiment, the energy directed along the first energy propagation path 120 includes one or more energy propagation paths between or including the energy propagation paths 120A and 120B, the one or more energy propagation paths being directed through the first energy waveguide 104 in a direction substantially parallel to an angle at which the first principal ray 138 propagates through the second side 114.

Embodiments may be configured such that energy directed along first energy propagation path 120 may exit first energy waveguide 104 in a direction substantially parallel to energy propagation paths 120A and 120B and parallel to first principal ray 138. It may be assumed that the energy propagation path extending through the energy waveguide elements 112 on the second side 114 comprises a plurality of energy propagation paths having substantially similar propagation directions.

Fig. 8 is a front view illustration of an embodiment of an energy waveguide system 100. The first energy propagation path 120 may extend in a unique direction 208 extending from the first energy waveguide 104 and determined by at least the first energy location 122 toward the second side 114 of the array 112 shown in fig. 7. The first energy waveguide 104 may be defined by spatial coordinates 204, and at least a unique direction 208 determined by the first energy location 122 may be defined by an angular coordinate 206 defining a direction of the first energy propagation path 120. The spatial coordinates 204 and the angular coordinates 206 may form a four-dimensional plenoptic coordinate set 210, the four-dimensional plenoptic coordinate set 210 defining a unique direction 208 of the first energy propagation path 120.

In an embodiment, energy guided through the first energy waveguide 104 along the first energy propagation path 120 substantially fills the first aperture 134 of the first energy waveguide 104 and propagates along one or more energy propagation paths located between the energy propagation paths 120A and 120B and parallel to the direction of the first energy propagation path 120. In an embodiment, the one or more energy propagation paths that substantially fill the first aperture 134 may comprise greater than 50% of the diameter of the first aperture 134.

In a preferred embodiment, the energy directed through the first energy waveguide 104 along the first energy propagation path 120 substantially filling the first aperture 134 may comprise 50% to 80% of the diameter of the first aperture 134.

Turning back to fig. 7 and 9A-H, in an embodiment, the energy waveguide system 100 can further include an energy suppression element 124, the energy suppression element 124 positioned to limit propagation of energy between the first side 116 and the second side 114 and to suppress propagation of energy between adjacent waveguides 112. In an embodiment, the energy suppression element is configured to suppress energy propagation along a portion of the first subset 290 of the plurality of energy propagation paths 108 that does not extend through the first aperture 134. In an embodiment, energy suppression element 124 may be located on first side 116 between energy waveguide array 112 and plurality of energy locations 118. In an embodiment, the energy-suppressing element 124 may be located on the second side 114 between the plurality of energy locations 118 and the energy propagation path 108. In an embodiment, the energy suppression element 124 may be located on the first side 116 or the second side 114 orthogonal to the energy waveguide array 112 or the plurality of energy locations 118.

In an embodiment, energy guided along the first energy propagation path 120 may converge with energy guided along the second energy propagation path 126 through the second energy waveguide 128. The first and second energy propagation paths may converge at a location 130 on the second side 114 of the array 112. In an embodiment, the third energy propagation path 140 and the fourth energy propagation path 141 may also converge at a location 132 on the first side 116 of the array 112. In an embodiment, the fifth energy propagation path 142 and the sixth energy propagation path 143 may also converge at a location 136 between the first side 116 and the second side 114 of the array 112.

In an embodiment, the energy waveguide system 100 may include structures for guiding energy, such as: structures configured to change the angular direction of energy passing therethrough, such as refractive, diffractive, reflective, gradient index, holographic or other optical elements; a structure comprising at least one numerical aperture; a structure configured to redirect energy away from at least one interior surface; an optical relay; and so on. It should be appreciated that the waveguide 112 may include any one or combination of bi-directional energy guiding structures or materials, such as:

a) refraction, diffraction, or reflection;

b) single or composite multilayer elements;

c) holographic optical elements and digitally encoded optics;

d)3D printing elements or lithographic masters or replicas;

e) fresnel lens, grating, zone plate, binary optical element;

f) a retroreflective element;

g) fiber, total internal reflection, or anderson localization;

h) gradient index optics or various index matching materials;

i) glass, polymer, gas, solid, liquid;

j) an acoustic waveguide;

k) micro-scale and nano-scale elements; or

l) polarization, prism or beam splitter.

In an embodiment, the energy waveguide system propagates energy bi-directionally.

In an embodiment, the energy waveguide is configured to propagate mechanical energy.

In an embodiment, the energy waveguide is configured to propagate electromagnetic energy.

In embodiments, the energy waveguide is configured to simultaneously propagate mechanical, electromagnetic, and/or other forms of energy by interleaving, layering, reflecting, combining, or otherwise providing appropriate material properties within one or more structures within the energy waveguide element and within one or more layers comprising the energy waveguide system.

In an embodiment, the energy waveguide propagates energy at different ratios of u and v, respectively, within the 4D coordinate system.

In an embodiment, the energy waveguide propagates energy as a composite function. In an embodiment, the energy waveguide comprises a plurality of elements along said energy propagation path.

In an embodiment, the energy waveguide is formed directly from the fiber optic repeater polished surface.

In an embodiment, the energy waveguide system comprises a material exhibiting lateral anderson localization.

In an embodiment, the energy waveguide system propagates hypersonic frequencies to converge haptic sensations in a volume.

Fig. 9A-H are illustrations of various embodiments of energy suppression element 124. For the avoidance of doubt, these examples are provided for illustrative purposes and are in no way limited to the scope of the combinations or embodiments provided within the scope of the present disclosure.

Fig. 9A illustrates an embodiment of a plurality of energy locations 118 in which energy suppressing elements 251 are placed adjacent to the surface of the energy locations 118 and include specified refractive, diffractive, reflective, or other energy altering characteristics. The energy suppression element 251 may be configured to limit the first subset of energy propagation paths 290 to a smaller range of propagation paths 253 by suppressing propagation of energy along the energy propagation paths 252. In an embodiment, the energy suppressing element is an energy relay having a numerical aperture less than 1.

Fig. 9B illustrates an embodiment of the plurality of energy locations 118 in which the energy-suppressing structures 254 are placed orthogonal to the energy locations 118 between regions, and in which the energy-suppressing structures 254 exhibit absorption properties, and in which the energy-suppressing structures 254 have a defined height along the energy propagation path 256 such that certain energy propagation paths 255 are suppressed. In an embodiment, the shape of the energy-suppressing structure 254 is hexagonal. In an embodiment, the shape of the energy-suppressing structure 254 is circular. In an embodiment, any orientation of the shape or size of the energy-suppressing structure 254 along the propagation path is non-uniform. In an embodiment, the energy-suppressing structure 254 is embedded within another structure having additional characteristics.

Fig. 9C illustrates a plurality of energy locations 118 in which first energy suppressing structure 257 is configured to substantially direct energy 259 propagating therethrough into a first state. Second energy inhibiting structure 258 is configured to allow energy 259, which is oriented substantially in the first state, to propagate therethrough and to limit propagation of energy 260, which is oriented substantially in a manner dissimilar to the first state. In an embodiment, the energy suppressing elements 257, 258 are a pair of energy polarizing elements. In an embodiment, the energy suppression elements 257, 258 are a pair of energy band pass elements. In an embodiment, the energy suppressing elements 257, 258 are diffractive waveguide pairs.

Fig. 9D illustrates an embodiment of the plurality of energy locations 118 in which the energy suppression element 261 is configured to alter the energy propagation path 263 to some extent depending on which of the plurality of energy locations 118 the energy propagation path 263 extends through. The energy suppression element 261 may alter the energy propagation path 263 in a uniform or non-uniform manner along the energy propagation path 263 such that certain energy propagation paths 262 are suppressed. The energy-suppressing structure 254 is positioned between regions orthogonal to the energy locations 118, and wherein the energy-suppressing structure 254 exhibits absorption properties, and wherein the energy-suppressing structure 254 has a defined height along the energy propagation path 263 such that some of the energy propagation path 262 is suppressed. In an embodiment, the suppression element 261 is a field lens. In an embodiment, the suppression element 261 is a diffractive waveguide. In an embodiment, the inhibiting element 261 is a curved waveguide surface.

Fig. 9E illustrates an embodiment of the plurality of energy locations 118 in which the energy suppression element 264 provides an absorption characteristic to limit the propagation of the energy 266 while allowing other propagation paths 267 to pass.

Fig. 9F illustrates an embodiment of the plurality of energy locations 118 and the plurality of energy waveguides 112 in which the first energy containment structure 268 is configured to generally direct energy 270 propagating therethrough into a first state. The second energy suppressing structure 271 is configured to allow energy 270 directed substantially to the first state to propagate therethrough and to restrict propagation of energy 269 directed substantially in a manner not similar to the first state. To further control energy propagation through the system, such as stray energy propagation 272, the energy suppression structures 268, 271 may require composite energy suppression elements to ensure that the energy propagation maintains an accurate propagation path.

Fig. 9G illustrates an embodiment of the plurality of energy locations 118, and wherein the energy suppression element 276 provides absorption characteristics to limit the propagation of energy along the energy propagation path 278 while allowing other energy along the energy propagation path 277 to pass through a pair of energy waveguides 112 for the effective apertures 284 within the waveguide array 112. In an embodiment, the energy dampening element 276 comprises black chrome. In an embodiment, the energy dampening element 276 comprises an absorbing material. In an embodiment, the energy suppression element 276 comprises a transparent pixel array. In an embodiment, the energy suppression element 276 comprises an anodized material.

Fig. 9H illustrates an embodiment including a plurality of energy locations 118 and a plurality of energy waveguides 112, wherein a first energy suppressing structure 251 is placed adjacent to a surface of the energy locations 118 and includes specified refractive, diffractive, reflective, or other energy altering characteristics. The energy suppression structure 251 may be configured to limit the first subset of energy propagation paths 290 to a smaller range of propagation paths 275 by suppressing propagation of energy along the energy propagation paths 274. The second energy dampening structure 261 is configured to alter the energy propagation path 275 to some extent depending on which of the plurality of energy locations 118 the energy propagation path 275 extends through. The energy-suppressing structure 261 may alter the energy propagation paths 275 in a uniform or non-uniform manner such that certain energy propagation paths 274 are suppressed. The third energy suppressing structure 254 is placed between the regions orthogonal to the energy locations 118. The energy-suppressing structure 254 exhibits absorption properties and has a defined height along the energy propagation path 275 such that certain energy propagation paths 274 are suppressed. The energy suppression element 276 provides absorption characteristics to limit the propagation of the energy 280 while allowing the energy 281 to pass therethrough. The composite system of similar or dissimilar waveguide elements 112 is positioned to substantially fill the effective waveguide element aperture 285 with energy from the plurality of energy locations 118 and alter the propagation path 273 of the energy as defined by the particular system.

In an embodiment, the energy-suppressing element 124 may include a structure for attenuating or modifying the energy propagation path. In an embodiment, the energy-suppressing element 124 may include one or more energy-absorbing elements or walls positioned within the system to limit the propagation of energy to or from the waveguide 112. In an embodiment, the energy-suppressing element 124 may include a specified numerical aperture positioned within the system 100 to limit the angular distribution of energy to and from the waveguide 112.

In embodiments, the energy-suppressing elements 124 may comprise one or more energy-blocking walls, structures, metals, plastics, glass, epoxies, pigments, liquids, display technologies, or other absorbing or structural materials with a defined thickness between the plane of the energy locations 122 and the plane of the waveguide array with voids or structures spaced up to the diameter of the waveguide opening.

In an embodiment, the energy-suppressing structure 124 is located near the first energy location 122 and includes an optical repeater panel adjacent to the first energy location 122. In an embodiment, the energy-suppressing element 124 may comprise an optical relay panel comprising one or more spatially uniform or variable numerical apertures, wherein the value of the numerical aperture is meaningfully limited to the energy of the waveguide 112 and the angular distribution of the energy from the waveguide 112. For example, embodiments of numerical apertures may be designed to provide an angular distribution equal to or near twice the field of view formed between energy locations and perpendicular to the center of the effective waveguide element size, entrance pupil, aperture, or other physical parameter for energy propagation, providing an off-axis fill factor for a given waveguide aperture 134.

In embodiments, the energy suppression element 124 may include a binary, gradient index, fresnel, holographic optical element, zone plate, or other diffractive optical element that alters the path of the energy wave through the system to reduce scattering, diffusion, stray light, or chromatic aberration. In an embodiment, the energy suppression element 124 may include a positive or negative optical element at or around the location, with the energy propagation path being changed to further increase the fill factor of the waveguide aperture 134 or reduce stray light. In embodiments, the energy suppression element 124 may include an active or passive polarizing element and a second active or passive polarizing element designed to provide spatial or temporal multiplexing attenuation of the energy location 122, the waveguide aperture 134, or a defined region of other regions. In embodiments, the energy suppression element 124 may include an active or passive aperture stop barrier designed to provide spatial or temporal multiplexing attenuation of the energy location 122, the waveguide aperture 134, or a defined region of other regions. In an embodiment, the energy-suppressing element 124 may include any one of the following or any combination thereof:

a) a physical energy baffle structure;

b) a solid, conical, or faceted mechanical structure;

c) an aperture stop or mask;

d) an optical relay and a controlled numerical aperture;

e) refraction, diffraction, or reflection;

f) a retroreflective element;

g) single or composite multilayer elements;

h) holographic optical elements and digitally encoded optics;

i)3D printing elements or lithographic masters or replicas;

j) fresnel lens, grating, zone plate, binary optical element;

k) fiber, total internal reflection, or anderson localization;

l) gradient index optics or various index matching materials;

m) glass, polymer, gas, solid, liquid;

n) millimeter, micro and nano-scale elements; and

o) polarization, prism or beam splitter.

In an embodiment, the energy-suppressing structure 124 may be configured to contain energy-blocking baffles packed in a hexagon configured to form a void that tapers along the Z-axis, thereby reducing the void size when reaching the aperture stop position of the waveguide system. In another embodiment, the energy-suppressing structure 124 may be configured to contain energy-blocking baffles packed in a hexagon in combination with the optical relay panel. In another embodiment, the energy-suppressing structure 124 may be configured to contain energy-blocking baffles packed in a hexagon that is filled with a prescribed index of refraction to further alter the energy wave projection path to and from the energy waveguide array. In another embodiment, diffractive or refractive elements may be placed, attached or bonded to the energy blocking baffle using a defined waveguide prescription to further alter the energy projection path to and from the waveguide element 112. In another example, energy-suppressing structure 124 may be formed as a single mechanical assembly, and energy waveguide array 112 may be placed, attached, or bonded onto assembled energy-suppressing elements 124. It should be appreciated that other embodiments may be utilized to achieve other energy waveguide configurations or super-resolution considerations.

In an embodiment, the energy-suppressing structure 124 may be located near the first energy location 122 and extend generally toward the first energy waveguide 104. In an embodiment, the energy-suppressing structure 124 may be located adjacent to the first energy waveguide 104 and extend generally toward the first energy location 122.

In an embodiment, the energy suppression element is configured to suppress electromagnetic energy.

In an embodiment, the energy suppression element is configured to suppress mechanical energy.

In an embodiment, the energy suppression element is configured to simultaneously attenuate mechanical, electromagnetic, and/or other forms of energy by interleaving, layering, reflecting, combining, or otherwise providing appropriate material properties within one or more structures within the energy suppression element and within one or more layers comprising the energy waveguide system.

In embodiments, the array of energy waveguides may be arranged to form a planar surface, or a curved surface having a desired shape. Fig. 13 is an illustration of an embodiment 1100 having an array of energy waveguides 1102 arranged in a curved configuration.

Embodiments of the present disclosure may be configured to direct energy having any wavelength belonging to the electromagnetic spectrum, including visible light, ultraviolet light, infrared light, x-rays, and the like. The present disclosure may also be configured to direct other forms of energy, such as acoustic sound vibrations and tactile pressure waves.

Fig. 10 is a diagram of another embodiment of an energy waveguide system 300. The energy waveguide system 300 may define a plurality of energy propagation paths 304, and may include a reflector element 314, the reflector element 314 including: a first reflector 306 located on a first side 310 of a reflector element 314, the first reflector 306 comprising one or more aperture stops 316 formed therethrough; and a second reflector 308 positioned on a second side 312 of reflector element 314, the second reflector 308 including one or more aperture stops 318 formed therethrough. First reflector 306 and second reflector 308 are configured to direct energy along a plurality of energy propagation paths 304, the energy propagation paths 304 extending through aperture stops of first reflector 316 and second reflector 318 and a plurality of energy locations 320 on first side 310 of reflector element 314. A first subset 322 of the plurality of energy propagation paths 304 extends through a first energy location 324. Reflector element 314 is configured to direct energy along a first energy propagation path 326 in first subset 322 of plurality of energy propagation paths 304.

In an embodiment, the first energy propagation path 326 may be defined by a first chief ray 338 formed between the first energy location 324 and a first aperture stop 328 of the first reflector 306. The first energy propagation path 326 may extend from the first aperture stop 330 of the second reflector 308 toward the second side 312 of the reflector element 314 in a unique direction that extends from the first aperture stop 330 of the second reflector 308 and is determined by at least the first energy location 324.

In an embodiment, energy directed along the first energy propagation path 326 substantially fills the first aperture stop 328 of the first reflector 306 and the first aperture stop 330 of the second reflector 308.

In an embodiment, the energy suppression element 332 may be positioned to limit the propagation of energy along a portion of the first subset 322 of the plurality of energy propagation paths 304 that does not extend through the first aperture stop 328 of the first reflector 306.

In embodiments where the energy is light and an energy waveguide can be used to guide the light, with a perfect parabolic structure, any rays passing through or from the focal point of the first reflector will be reflected parallel to the optical axis, reflected by the second reflector, and then relayed at the same angle in a reverse orientation.

In an embodiment, the first reflector and the second reflector have different focal lengths in order to produce different magnifications of the energy information and/or to change the field angle range at which the viewer observes the reflected information from above the surface of the second reflector. The aperture stop may have different sizes and different focal lengths for different design purposes.

Another embodiment is provided in which both reflective surfaces are tapered, faceted, curved in a non-linear shape, or otherwise shaped. The design of this bend is critical to ensure that the displayed information and the observed information can have a non-linear relationship to alter or simplify signal processing.

In an embodiment, the energy waveguide includes a flexible reflective surface that can dynamically change a reflective surface profile to change a propagation path of energy through the energy waveguide system.

In embodiments, additional waveguides including, but not limited to, reflective or optical elements, birefringent materials, liquid lenses, refraction, diffraction, holography, and the like, may be located anywhere within the energy propagation path. By this means, such an embodiment provides a design such that, when viewed, the viewing angle is at a significantly different position than the aperture stop and focal length that would otherwise be provided. Fig. 11 shows such an application of this method.

Fig. 11 is an illustration of an embodiment of an energy waveguide system 700. Energy waveguide system 700 includes first and second reflectors 702 and 704, respectively. Positioned at the focal point of the second reflector 702 is an additional optical element 706 and an energy suppressor 707 perpendicular to the energy location 708. The additional optical elements are designed to affect the energy propagation path of the energy propagating through the energy waveguide system 700. Additional waveguide elements may be included within the energy waveguide system 700 or the additional energy waveguide system may be placed into the energy propagation path.

In an embodiment, the array of energy waveguide elements may comprise:

a) hexagonal packing of the energy waveguide array;

b) a square package of energy waveguide arrays;

c) irregular or semi-regular packing of the energy waveguide array;

d) an array of curved or non-planar energy waveguides;

e) an array of spherical energy waveguides;

f) a cylindrical energy waveguide array;

g) a tilted regular array of energy waveguides;

h) an array of slanted irregular energy waveguides;

i) an array of spatially varying energy waveguides;

j) a multi-layer energy waveguide array;

fig. 12 highlights the differences between square packages 901, hexagonal packages 902 and irregular packages 903 of the array of energy waveguide elements.

The energy waveguides can be fabricated on glass or plastic substrates to specifically contain the optical relay elements when desired, and can be designed with glass or plastic optical elements to specifically contain the optical relays when desired. Furthermore, the energy waveguides may be faceted for designs providing multiple propagation paths or other column/row or checkerboard orientations, particularly considering, but not limited to, multiple propagation paths separated by beam splitters or prisms, or tiled for waveguide configurations allowing tiling or a single monolithic slab, or tiled into a curved arrangement (e.g., faceted cylinders or geometries become tiled so as to match spheres), curved surfaces including, but not limited to, spheres and cylinders or any other arbitrary geometry as required for a particular application.

In embodiments where the array of energy waveguides comprises a curved configuration, the curved waveguides may be produced by thermal processing or by fabrication directly on a curved surface to contain the optical repeater elements.

In embodiments, the array of energy waveguides may abut other waveguides, and may cover the entire wall and/or ceiling and or room depending on the particular application. The waveguide can be explicitly designed for either on-substrate or off-substrate mounting. The waveguide can be designed to be directly matched to the energy surface, or offset with an air gap or other offset medium. The waveguide may include an alignment device that provides the ability to actively or passively focus the plane as a permanent fixture or tool element. The purpose of the described geometry is to help optimize the viewing angle defined by the normal to the waveguide element and the image represented. For extremely large energy surface plane surfaces, most of the angular samples at the far left and far right of the surface are primarily outside the view volume of the environment. The ability to use more of these propagating rays to form a converging volume is significantly improved by the curved profile and curved waveguide for the same energy surface. However, this is at the expense of available information when off-axis. The application specific nature of the design generally dictates which of these proposed designs are to be implemented. Furthermore, the waveguide can be designed with regular, graded or regional element structures that are fabricated with additional waveguide elements to tilt the elements towards a predetermined waveguide axis.

In embodiments where the energy waveguide is a lens, embodiments may include convex and concave microlenses, and may include lenses fabricated directly onto the optical relay surface. This may involve a destructive or additive microlens fabrication process, including the removal of the material to be formed or stamped and the microlens contours, or the direct fabrication of a direct replica onto this surface.

Embodiments may include multiple layered waveguide designs for additional energy propagation optimization and angle control. All of the above embodiments can be combined together, either independently or in conjunction with this method. In an embodiment, a plurality of layered designs may be envisaged, with a slanted waveguide structure on the first waveguide element and a regionally varying structure of the second waveguide element.

Embodiments include the design and fabrication of per-element or per-region liquid lens waveguides bonded together as a single waveguide. Additional designs of this approach include a single birefringent or liquid lens waveguide electrical cell that can modify the entire waveguide array simultaneously. This design enables dynamic control of the effective waveguide parameters of the system without redesigning the waveguide.

In embodiments configured to guide light, it is possible to generate wall-mounted 2D, light field, or holographic displays by any combination of the present disclosure provided herein. The wall-mounted configuration is designed such that the viewer sees images that may float in front of, at, or behind the designed display surface. By this approach, the angular distribution of light may be uniform, or have increased density at any particular location in space, depending on the particular display requirements. In this way, it is possible to configure the waveguide to change the angular distribution in accordance with the surface profile. For example, for a given distance perpendicular to the display surface and the planar waveguide array, an optically perfect waveguide will provide increased density at the vertical center of the display, with the ray separation distance gradually increasing along the given vertical distance to the display. Conversely, if the light rays are viewed radially around the display, with the viewer maintaining the distance between the eye and the center point of the display, the observed light rays will maintain a consistent density throughout the field of view. Depending on the intended viewing conditions, the characteristics of each element can be optimized by varying the waveguide function to produce any potential light distribution that optimizes the viewing experience of any such environment.

Fig. 14 is an illustration of an embodiment 1200 that highlights how a single waveguide element function 1202 may produce the same energy distribution 1204 on a radial viewing environment 1206, while the same waveguide element function 1202 appears to exhibit increasing density at a waveguide element center 1212 of the waveguide surface and decreasing density at locations further from the center 1212 of the waveguide surface when propagating at a constant distance 1208 parallel to the waveguide surface 1210.

Fig. 15 is a diagram of an embodiment 1300 illustrating a waveguide element function 1302 configured to exhibit a uniform density at a constant distance 1304 parallel to a waveguide surface 1306, as measured around a radius 1308 around the center of the waveguide surface 1306, while producing a significantly lower density at the center 1310 of the waveguide surface 1306.

The ability to generate a waveguide function that varies the sampling frequency over field distance is a feature of various waveguide distortions and is known in the art. Traditionally, it has not been desirable to include distortions in the waveguide function, however, for the purposes of waveguide element design, these are all features that claim to be beneficial in terms of the ability to further control and distribute energy propagation depending on the particular volume of view desired. Depending on the apparent requirements, it may be desirable to add multiple functions or layers or function gradients across the waveguide array.

In an embodiment, the function is further optimized by the energy surface and/or the curved surface of the waveguide array. The variation of the normal of the chief ray angle relative to the energy surface itself may also improve efficiency and require a function other than a planar surface, but the gradient, variation and/or optimization of the waveguide function still applies.

In addition, with the resulting optimized waveguide array, it is possible to further increase the effective size of the waveguides by tiling each waveguide and system to produce any size with a desired form factor, in view of the waveguide splicing approach. It is important to note that waveguide arrays may exhibit gap artifacts different from the energy surface due to reflections created between any two separate substrates, significant contrast differences at mechanical gaps, or due to any form of non-square grid packing pattern. To eliminate this effect, either larger individual waveguides can be created, a refractive matching material can be used between the edges of any two surfaces, a regular waveguide grid structure can be employed to ensure that no elements are separated between the two waveguide surfaces, and/or precise cuts between elements and seams along a non-square waveguide grid structure can be used to suppress energy.

With this method it is possible to produce room-scale 2D, light-field and/or holographic displays. These displays can seamlessly span large planar or curved walls, can be produced to cover all walls in a cubic fashion, or can be produced in a curved configuration where a cylindrical or spherical-type shape is formed to improve the viewing angle efficiency of the overall system.

Alternatively, it is possible to design a waveguide function that distorts the propagated energy to virtually remove regions not needed for the desired viewing angle, thereby causing an uneven distribution of energy propagation. To accomplish this, a mount-shaped optical profile, toroidal lens, concentric prism array, fresnel or diffractive function may be implemented, binary, refractive, holographic and/or any other waveguide design may achieve larger aperture and shorter focal length (which will be referred to herein as "fresnel microlenses") to provide the ability to actually form a single-element or multi-element (or multi-sheet) fresnel waveguide array. Depending on the waveguide configuration, this may or may not be combined with additional optics, including additional waveguide arrays.

To produce a wide angle of energy propagation (e.g., 180 degrees), a very low effective f/number is required (e.g., < f/.5), and to ensure that 4D "disk flipping" (the ability of light rays from one waveguide element to see undesired energy locations beneath any second waveguide element) does not occur, it is also required that the focal length closely match the desired viewing angle in an appropriate manner. This means that to produce a view volume of about 160 degrees, a lens of about f/.17 and a nearly matching focal length of about.17 mm are required.

FIG. 16 illustrates an embodiment 1400 in which multiple energy waveguides comprise diffractive waveguide elements 1402, and shows one proposed structure for a modified Fresnel waveguide element structure 1404 that produces an effectively very short focal length and low f/number while directing energy at well-defined locations 1406.

Fig. 17 illustrates an embodiment 1500 in which multiple energy waveguides comprise elements 1502, and shows how such waveguide configurations 1506 can be used in an array to provide full density light propagation of a desired volume 1504.

Another embodiment of the proposed modified waveguide configuration provides a method of producing radially symmetric or helical rings or gradients of two or more materials with a certain refractive index along either or both of the transverse or longitudinal orientations, spaced a predetermined amount, with each ring spacing having a diameter X, where X may be constant or variable.

In another embodiment, an equal or non-linear distribution of all light rays results with or without a modified waveguide configuration for wall-mounted and/or desk-mounted waveguide structures and all room or environment based waveguide structures, where multiple waveguides are tiled.

By means of the waveguide array it is possible to generate a plane of projected light that converges in space at a position that is not located on the surface of the display itself. By ray tracing these rays, it is clear how the geometry involved and how the converging rays can be rendered both in the screen (away from the viewer) and out of the screen (towards the viewer) or both. When a plane is moved away from the viewer on a flat display with a conventional waveguide array design, the plane grows with the viewing scene and may be obscured by the physical frame of the display itself, depending on the number of active illumination sources. In contrast, when a plane moves towards the viewer on a flat display with a conventional waveguide array design, the plane shrinks with the viewpoint scene, but can be seen from all angles at a given position, as long as the viewer is at an angle that presents energy to the eye, and the virtual plane does not move beyond the angle formed between the viewer and the far edge of the active display area.

In one embodiment, the observed 2D image is presented off-screen.

In another embodiment, the observed 2D image is presented in a screen.

In another embodiment, the observed 2D images are presented simultaneously in and/or out of the screen.

In another embodiment, the observed 2D image is presented with other stereo elements, or as text for other flat design or interactive reasons.

In another embodiment, the observed 2D image exhibits a higher effective 2D resolution than the physical number of X and Y waveguide elements that would otherwise be present, since the light rays can converge in space at a higher density than the physical elements.

The novelty of this approach is that it is entirely possible to make a holographic display that can both stereoscopically image and produce extremely high resolution 2D images, so that no other mechanical or electronic devices or changes are required to seamlessly move the waveguides in the display between flat and stereoscopic images or to produce other interesting effects.

By this feature it is possible to programmatically isolate certain illumination sources for presentation to a viewer who is only visible to the display at some significant angles.

In one embodiment, a single pixel or group of pixels is illuminated under each waveguide element at an angle that is triangular to the viewer's eye and presents an image that is only visible from the viewer's position in space.

In another embodiment, the second illumination source or set of illumination sources is presented simultaneously to be triangulated with a location that is seen only by the second viewer and that contains an image that may be the same as or different from the first image presented to the first viewer. For the avoidance of doubt, this may be X addressable views, where X represents the number of separately addressable views which may be one or more.

In another embodiment, the images are presented using tracking with sensors and algorithms known in the art of the eye, retina, object, etc., such that the illuminated pixel locations dynamically change to dynamically present the images to the viewer and the triangulated position between the pixels beneath each waveguide element. This may apply to one or more observers. The tracking may be performed as a 2D process or a 3D/stereo process, or with other depth sensing techniques known in the art.

In one embodiment, the first and second regions are each parabolic in profile, wherein the focal point of the first region is located at the apex of the second region and the focal point of the second region is located at the apex of the first region, and the display surface is located at an opening at the apex of the second region, and an opening equivalent to the diameter of the display surface is presented to the apex of the second region located at the apex of the first region. In this way, the display surface image appears to float on a surface that does not have any physical surface, since light rays passing through the focal point of the second region, as viewed from an off-axis viewpoint, will reflect from the second region surface and be de-aligned from the first surface and then make the same angle with the viewing position in the reverse orientation from the first region to the display surface.

In an embodiment, the dual paraboloid repeater system includes two reflective regions, in each reflective region, a focal point at the vertex of the other reflector, a display surface at the vertex of the second region, and an opening equal to the diameter of the display surface presented, and at the first region to generate a virtual image of the display surface. In the case of waveguide arrays, holographic or light field displays, the observed image will retain the properties of holographic data and appear to float in space without a physical display surface.

In another embodiment, the focal position of zone two is different, resulting in zooming in or out. In a second embodiment, the two regions have matching focal lengths and are offset from each other by a distance greater than the focal length in order to produce a virtual image at increased magnification.

In another embodiment, the parabolic profile is fabricated to accommodate a particular shape, such that different viewing positions from the display accommodate various display surface geometries or other desired viewing angles or conditions.

In another embodiment, the two regions comprise a plurality of facets such that light propagates through the faceted regions independently, rather than as a single surface.

In another embodiment, the reflective surfaces are formed by energy repeaters such that the CRA of the energy surface exceeds the possible viewing angle of the curved surface applied to the surface or surfaces, where the first surface, which would otherwise be a reflective surface, has a specific geometric profile and the second surface at the other end of the waveguide element has a specific geometric profile, which cumulatively have the CRA of reflected energy from the position of the observer, the addition of energy surface panels at the second surface can be implemented, providing energy information that is not visible from the direct position of the observer but can be provided indirectly through the reflective surface or surfaces, and the associated calibration procedures needed to calculate the reflected imaging data about the final observed data.

While various embodiments in accordance with the principles disclosed herein have been described above, it should be understood that they have been presented by way of example only, and not limitation. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the claims and their equivalents issuing from the present disclosure. Moreover, the above advantages and features are provided in described embodiments, and the application of such issued claims should not be limited to processes and structures accomplishing any or all of the above advantages.

It is to be understood that the primary features of the present disclosure may be employed in various embodiments without departing from the scope of the disclosure. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific methods described herein. Such equivalents are considered to be within the scope of this disclosure and are encompassed by the claims.

Additionally, section headings herein are provided for consistency with the suggestions under 37CFR 1.77, or to otherwise provide organizational cues. These headings should not be used to limit or characterize the invention as set forth in any claims that may issue from this disclosure. Rather, and by way of example, although the headings refer to a "technical field," such claims should not be limited by the language describing the so-called technical field under this heading. Furthermore, the description of technology in the "background" section should not be taken as an admission that technology is prior art to any invention in this disclosure. The summary of the invention should not be considered a feature of the invention set forth in the issued claims. Furthermore, any reference in the singular to "the invention" should not be used to argue that there is only a single point of novelty in the present invention. Multiple inventions may be set forth according to the limitations of the multiple claims issuing from this disclosure, and such claims accordingly define the inventions protected thereby and their equivalents. In all cases, the scope of such claims should be considered in light of the present disclosure based on its own advantages, and should not be constrained by the headings set forth herein.

The use of the words "a" or "an" when used in conjunction with the term "comprising" in the claims and/or the specification may mean "one" and also conform to the meaning of "one or more," at least one, "and" one or more than one. Although this disclosure supports the definition of "and/or" in reference to an individual alternative, the term "or" as used in the claims is intended to mean "and/or" unless the specific reference to an individual alternative or an alternative is mutually exclusive. Throughout this application, the term "about" is used to indicate that a value includes the inherent variation in error of the apparatus, method used to determine the value, or the variation that exists between study subjects. In general, but consistent with the foregoing discussion, numerical values modified herein by approximating words such as "about" may vary by at least ± 1, 2, 3, 4, 5, 6, 7, 10, 12, or 15% from the stated values.

As used in this specification and claims, the words "comprise" (and any form comprising (comprising), such as "comprises" and "comprises"), "have" (and any form having (e.g., "has" and "has"), "include" (and any form containing (including), such as "includes" and "includes") or "contain" (and any form containing (including), such as "contains" and "contains") are inclusive or open-ended, and do not exclude other unrecited elements or method steps.

Comparison, measurement, and timing words such as "at …," "equivalent," "during …," "full," and the like are to be understood as meaning "substantially at …," "substantially equivalent," "substantially during …," "substantially full," and the like, wherein "substantially" means that such comparison, measurement, and timing can be used to achieve the desired results, implicitly or explicitly stated. The terms "proximate," "proximity to," and "adjacent" relative to the relative positions of elements shall mean sufficiently close to have a substantial effect on the corresponding system element interaction. Other approximating language similarly refers to conditions, which when so modified are understood to not necessarily be absolute or perfect, but would be considered close enough to allow a person of ordinary skill in the art to assuredly specify the conditions present. The extent to which the description may vary will depend on how much variation can be made and still allow one of ordinary skill in the art to recognize the modified features as still having the desired characteristics and capabilities of the unmodified features.

The term "or combinations thereof" as used herein refers to all permutations and combinations of the listed items preceding the term. For example, A, B, C or a combination thereof is intended to include at least one of: A. b, C, AB, AC, BC, or ABC, and if the order is more important in a particular case, BA, CA, CB, CBA, BCA, ACB, BAC, or CAB. Continuing this example, combinations containing one or more repetitions of the item or items are expressly included, such as BB, AAA, AB, BBC, aaabccccc, CBBAAA, CABABB, and the like. Those of skill in the art will appreciate that there is typically no limitation on the items or number of items in any combination, unless otherwise apparent from the context.

All of the compositions and/or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this disclosure have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the methods described herein without departing from the concept, spirit and scope of the disclosure. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the disclosure as defined by the appended claims.