阅读说明：本技术 成像位移装置及其制造方法 (Imaging displacement device and method of manufacturing the same ) 是由 陈明驰 许雅伶 于 2018-07-20 设计创作，主要内容包括：一种成像位移装置,包括投影镜头、可在绕射状态和非绕射状态切换的第一光栅、及设有反射面的光学元件。投影镜头设有透镜组,且透镜组包含第一透镜和第二透镜。第一光栅及光学元件均设于投影镜头内,且光学元件位于第一光栅的光路下游。第一透镜为最接近光学元件的透镜,且第一光栅到反射面于投影镜头的光轴上的距离,小于第一透镜到反射面于光轴上的距离。(an imaging displacement device includes a projection lens, an th grating capable of switching between a diffraction state and a non-diffraction state, and an optical element having a reflective surface, the projection lens has a lens set including a th lens and a second lens, a th grating and the optical element are both disposed in the projection lens, and the optical element is located at the downstream of the th grating in the optical path, a th lens is the lens closest to the optical element, and the distance between the th grating and the reflective surface on the optical axis of the projection lens is smaller than the distance between the th lens and the reflective surface on the optical axis.)

An imaging displacement device of the type , comprising:

projection lens provided with a lens group including th and th second lenses without any lenses provided between the second and th lenses, and

the grating capable of switching between a diffraction state and a non-diffraction state is disposed on the side of the th lens away from the second lens, wherein the distance from the th grating to the stop of the projection lens on the optical axis of the projection lens is smaller than the distance from the th grating to the second lens on the optical axis.

2. The imaging displacement device as claimed in claim 1, wherein image light passes through said grating in a substantially straight line direction and exits from in a direction when the grating is in a non-diffractive state, said image light is deflected by said grating and exits from in a second direction when said grating is in a diffractive state, and said direction is different from said second direction.

3. The imaging displacement device of claim 1, wherein the th lens is disposed between the second lens and the th grating.

An imaging displacement device of the type , comprising:

projection lens provided with a lens group including th lens and second lens;

a grating capable of switching between a diffraction state and a non-diffraction state, and is arranged in the projection lens

optical element, set in the projection lens, the optical element has reflection surface and located downstream of the light path of the grating, wherein the th lens is the lens closest to the optical element, and the distance between the th grating and the reflection surface on the optical axis of the projection lens is smaller than the distance between the th lens and the reflection surface on the optical axis.

5. The image shifting device of claim 4, wherein the th grating and the optical element are located within the lens group.

6. The imaging displacement device as claimed in claim 4, wherein image light is incident to the reflective surface and reflected by the reflective surface to the direction of when the th grating is in a non-diffractive state, the image light is deflected by the th grating and exits from in a second direction when the grating is in a diffractive state, and the direction is different from the second direction.

7. The image shifting device of claim 1 or 4, wherein the grating is disposed at a position coincident with or adjacent to an aperture of the projection lens.

8. The imaging displacement device of claim 1 or 4, further comprising a second grating switchable between a diffractive state and a non-diffractive state, wherein the grating arrangement of the second grating is different from the grating arrangement of the grating.

9. The imaging displacement device of any of claims 1 to 6, , wherein each of said gratings is a holographic polymer dispersed liquid crystal cell.

10, A method of making an imaging displacement device, comprising:

providing a lens barrel;

the th lens and the th lens are installed in the lens barrel, and

a grating capable of switching between a diffraction state and a non-diffraction state and a optical element with a reflecting surface are mounted in the lens barrel, wherein the th lens is closer to the reflecting surface than the second lens, and the distance from the th grating to the reflecting surface on the optical axis of the th lens is smaller than the distance from the th lens to the reflecting surface on the optical axis.

Technical Field

The invention relates to imaging displacement devices and a method for manufacturing the imaging displacement devices.

Background

In recent years, various image display technologies have been widely applied in daily life, and in image display devices, for example, an imaging displacement module can be disposed to change the light path of light traveling in the device, so as to provide various effects such as improving the imaging resolution and improving the image quality.

The background section is only provided to assist in understanding the present disclosure, and thus the disclosure in the background section may include , which does not constitute a prior art that is known to those of ordinary skill in the art, and the disclosure in the background section does not represent such a matter or problem to be solved by or embodiments of the present invention, which was known or recognized by those of ordinary skill in the art prior to the filing date of the present application.

Disclosure of Invention

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the embodiments of the present invention.

The invention provides kinds of imaging displacement devices, including projection lens and grating that can switch between diffraction state and non-diffraction state, the projection lens has lens group, the lens group includes 0 th lens and second lens, and there is no lens between the second lens and th lens, th grating locates the side far away from second lens of th lens, the distance between st grating and the aperture of projection lens on the optical axis of projection lens is smaller than the distance between st grating and the second lens on the optical axis of projection lens, when th grating switches between diffraction state and non-diffraction state, because of the persistence of vision of human eye, observer can see times more pixel image, obtain the effect of increasing the pixel resolution to 2 times for example.

The invention also provides kinds of imaging displacement devices, including projection lens, th grating that can be switched between diffraction state and non-diffraction state, and optical element with reflecting surface, the projection lens has lens group, and the lens group includes th lens and second lens, th grating and optical element are all set in projection lens, and optical element locates at th optical path downstream of grating, th lens is the lens closest to optical element, and the distance between th grating and reflecting surface on the optical axis of projection lens is smaller than the distance between th lens and reflecting surface on the optical axis of projection lens, when th grating is switched between diffraction state and non-diffraction state in turn, because of the phenomenon of vision persistence of human eyes, the observer can see times more pixel images, obtain the effect of raising pixel resolution to 2 times, for example.

The invention also provides a manufacturing method of imaging displacement devices, which comprises providing a lens cone, installing the th lens and the second lens in the lens cone, and installing th grating capable of switching between a diffraction state and a non-diffraction state and an optical element with a reflecting surface in the lens cone, wherein the th lens is closer to the reflecting surface than the second lens, and the distance from the st grating to the reflecting surface on the optical axis of the th lens is smaller than the distance from the th lens to the reflecting surface on the optical axis.

The imaging displacement device of the invention uses diffraction grating formed by holographic polymer dispersed liquid crystal element as light path adjusting element, and can obtain pixel image displacement effect without actuator, thereby avoiding high speed collision and noise, and prolonging service life of element. Moreover, the liquid crystal transition time is short, so that more luminous efficiency can be kept. In addition, the diffraction grating as the light path adjusting element has a simple structure and does not need to be modified with the size of the passive element (such as the light valve).

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIGS. 1A and 1B are schematic diagrams illustrating a grating formed by holographic polymer dispersed liquid crystal devices according to an embodiment of the present invention.

Fig. 2A and 2B are schematic diagrams illustrating an imaging shift module according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating an embodiment of displaying pixel image displacement effects.

Fig. 4A to 5D are schematic diagrams illustrating an imaging shift module according to another embodiment of the invention, wherein fig. 4A to 4D are side views of the imaging shift module, and fig. 5A to 5D are top views of the imaging shift module shown in fig. 4A to 4D, respectively, as viewed from above and downward.

FIG. 6 is a diagram illustrating an image displacement effect of pixels according to another embodiment of the present invention.

FIG. 7 is a diagram illustrating an image displacement effect of pixels according to another embodiment of the present invention.

Fig. 8 shows a schematic view of an imaging displacement device of an embodiment of the invention.

FIG. 9 is a diagram illustrating an image displacement effect of pixels according to another embodiment of the present invention.

FIG. 10 shows a schematic view of an imaging displacement device according to another embodiment of the invention.

FIG. 11 is a diagram illustrating an embodiment of an imaging shift module applied to a optical system.

FIG. 12 is a schematic diagram of an imaging displacement module according to another embodiment of the present invention applied to a optical system.

Detailed Description

The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

The disclosure in the following embodiments discloses kinds of imaging shift modules, which can be applied to different optical systems (e.g., display devices, projection devices, etc.) to adjust or change the optical path to provide, but not limited to, effects such as improving the imaging resolution, improving the image quality (eliminating dark areas, softening image edges), etc., and the arrangement position and arrangement manner of the imaging shift modules in the optical systems are not limited at all.

FIGS. 1A and 1B are diagrams showing a grating formed by a Holographic Polymer dispersed liquid Crystal element according to an embodiment of the present invention, in an embodiment , a Holographic Polymer dispersed liquid Crystal element (HPDLC) 10 is used as a grating switchable between a diffraction state and a non-diffraction state, as shown in FIG. 1A, when a power supply 22 applies a voltage to the Holographic Polymer dispersed liquid Crystal element 10, for example, a non-diffraction state is formed, refractive indexes of the liquid Crystal 12 and the Polymer 14 become almost identical, and an image light I can pass through the Holographic Polymer dispersed liquid Crystal element 10 without changing a traveling direction almost linearly without changing a diffraction phenomenon, as shown in FIG. 1B, if the Holographic Polymer dispersed liquid Crystal element 10 is not applied with a voltage, a difference in refractive index between the liquid Crystal 12 and the Polymer 14 causes a diffraction state, the image light I is deflected by the Holographic Polymer dispersed liquid Crystal element 10 by angles θ, so that an emission direction is different from an incident direction, and the switching manner is not limited, in another embodiment , a negative dielectric material, a material, and a material, when a diffraction material, such as a material, is applied to a diffraction voltage, is applied to the Holographic Polymer dispersed liquid Crystal element, and a non-diffraction state is changed.

Fig. 2A and 2B show schematic diagrams of the imaging displacement module of according to the embodiment of the invention, as shown in fig. 2A and 2B, the imaging displacement module 110 includes a th grating 112 and a second grating 114, the th grating 112 and the second grating 114 are switchable between a diffraction state and a non-diffraction state, and the th grating 112 and the second grating 114 are disposed side by side, the second grating 114 is disposed downstream of the optical path of the 585 th grating 112, i.e., the image light I passes through the th grating 112 and then the second grating 114, the th grating 112 has corresponding surfaces 112A and 112B, and the second grating 114 has corresponding surfaces 114a and 114B, the surface 112A of the th grating 112 receives image light I, and the image light I is received by the surface 114a of the second grating 114 after exiting from the surface 112B, and the image light I is finally emitted from the surface 114a of the second grating 114B by the surface 114B when the image light I passes through the surface 114a normal line of the second grating 114B, and is reflected by the normal to the second grating 112B, and is finally reflected by the image light t2 t, and is reflected by the normal to the second grating 112B, and is a linear image B, when the image light I is reflected off the image is reflected by the normal of the second grating 114B, the normal of the image x B, the image x-diffraction grating 112, the image B, the image I14B, the image is a , the image B, the image light l grating 114B, the image is a linear image B, the image B is a , the image B is a 366 when the image B, the image B is a linear image B, the image B is formed by the image B, the image B is a diffraction angle of the image B, the image B is changed, the image B, the.

Fig. 4A to 5D show schematic views of an imaging displacement module according to another embodiment of the invention, wherein fig. 4A to 4D are side views of the imaging displacement module, fig. 5A to 5D are top views of the imaging displacement module from above in fig. 4A to 4D respectively when the imaging displacement module 120 includes a second grating 122, a second grating 124, a third grating 132 and a fourth grating 134 that can be switched between a diffraction state and a non-diffraction state, the second grating 124 can be located downstream of the optical path of the second grating 122, the third grating 132 can be located downstream of the optical path of the second grating 122, and each grating can be, for example, disposed side by side, the second 1 grating 122 and the second grating 124 constitute a second 2 set of translation units, so that the pixel image can be translated along the dimension 3, the second set of translation units, so that the pixel image can be formed along the normal directions of the third grating 132 and the second set of translation units 132, when the image forming images through the image forming image i.e.g. the image pickup unit 132, the image pickup unit 132 can be formed by translating along the normal directions of the image pickup unit 132B, and image pickup unit 132, when the image pickup unit 122, the image pickup unit 132, the image pickup unit 122 can be formed by the image pickup unit 122, the image pickup unit 122, the image pickup unit, the.

Moreover, the grating arrangement of the second group of translation units (gratings 132, 134) and the grating arrangement of the group of translation units (gratings 122, 124) can obtain the biaxial adjustment effect in two dimensions only by being different, and thus only different grating arrangements need to be adjusted, and a non-right-angled parallelogram image track can be formed as shown in fig. 7 to meet different optical path adjustment requirements.

Fig. 8 shows a schematic diagram of an image shift device according to an embodiment of the invention, as shown in fig. 8, an image shift device 200 includes a projection lens 210, a grating 220 and an optical element 230, the grating 220 can be switched between a diffraction state and a non-diffraction state, the optical element 230 is provided with a reflection surface 230a and is located downstream of the grating 220 in an optical path, the projection lens 210 is provided with a lens group formed by a plurality of lenses ( e.g. lenses 212, 214, 216, 218), and the grating 220 and the optical element 230 can be located in the lens group of the projection lens 210. in this embodiment, the lens closest to the reflection surface 230a (e.g. based on a linear distance from a geometric center of the reflection surface) of the plurality of lenses is the lens 212, and a distance d1 from the grating 220 to the reflection surface 230a is smaller than a distance d2 from the lens 212 closest to the reflection surface 230a (d1 < d2), the distance between the grating 220, the reflection surface 230a and the lens 212 can be, e.g. the distance between the grating 220, the reflection surface 230a and the lens 212 can be such as when the two diffraction grating 220, reflection surfaces 230a diffraction grating 220, the diffraction grating 220 and the lens 214 are respectively arranged in a diffraction grating 230a diffraction grating 220 and a reflection surface 230a, the reflection surface 230a reflection state, the reflection effect can be adjusted when they are switched between the diffraction grating 220 and a diffraction grating 230a diffraction grating 220, the diffraction grating 220 can be changed to form an image, the diffraction grating 230a reflection image, the diffraction grating 230a reflection image 230a, the diffraction grating 230a, and a reflection image can be formed by two diffraction grating 230a reflection image 230a reflection effect when the diffraction grating 220, the diffraction grating 220 can be formed by two diffraction grating 220, the diffraction grating 230a diffraction grating 220, the diffraction grating 220 can be changed when the diffraction grating 220, the diffraction.

Fig. 10 shows a schematic diagram of an image shifting device 250 according to another embodiment of the present invention, as shown in fig. 10, the image shifting device 250 includes a projection lens 260 and a grating 270, the grating 270 is switchable between a diffractive state and a non-diffractive state, the projection lens 260 is provided with a lens assembly consisting of a plurality of lenses (e.g., nd lens 262, second lens 264 and third lens 266), and the grating 270 is provided in the projection lens 260. in this embodiment, no other lens is provided between the th lens 262 and the second lens 264, the grating 270 is provided on the side of the rd lens 262 remote from the second lens 264, and the grating 270 is provided at a position coinciding with or adjacent to the aperture 268 of the projection lens 260. in the embodiment, the distance D1 between the aperture stop of the grating 270 and the projection lens 260 on the optical axis of the projection lens may be smaller than the distance D2(D1 < D2) between the grating 270, the aperture stop 268 and the second lens 264 on the optical axis, e.g., the distance D2 (D8536) between the grating 270, the grating 268 and the second lens 264 may be equal to the distance D when the two diffraction grating 270, the grating may be switched between the grating 220, the grating may be in a linear image may be in a linear diffraction image-forming a linear diffraction image-obtained by means when the two diffraction grating 220, and a linear diffraction image-obtained by means, the two diffraction image-obtained by means, the two diffraction-image-obtained by means, the two diffraction-image-.

Fig. 11 is a schematic view illustrating an application of the image shift module to a 57 optical system, referring to fig. 11, an optical device 400 includes an illumination system 310, a light valve 320, a projection lens 260, and an image shift module 110, wherein the illumination system 310 has a light source 312 adapted to provide a light beam 314, and the light valve 320 is disposed on a transmission path of the light beam 314, the light valve 320 is adapted to convert the light beam 314 into a plurality of sub-images 314a, furthermore, the projection lens 260 is disposed on the transmission path of the sub-images 314a, and the light valve 320 is disposed between the illumination system 310 and the projection lens 260, the image shift module 110 is disposed between the light valve 320 and the projection lens 260 or within the projection lens 260, such as between the light valve 320 and the internal reflection Prism 319, or between the internal reflection Prism 319 and the projection lens 260, and on the transmission path of the sub-images 314a, the light source 312 may include a red light emitting diode 312R, a green light emitting diode 312G, and blue light emitting diode 312B, the light emitting diodes 312R are combined by the optical device 316 to form a combined light beam 314, the image shift module 314a horizontal diffraction sub-image 314a displacement of the image 314a, the image shift module 314 is obtained by the imaging sub-image shift module 314a horizontal image shift of the imaging sub-image shift module 210, the image shift module 314a horizontal image shift module 314, the image shift module 314 is performed by the imaging sub-projection lens 320 a, the imaging sub-image shift module 210, the imaging sub-screen 210 is not the imaging sub-210, and the image shift module 210 is disposed in a horizontal image shift module 210, and the image shift module 210 is a, and the image shift module 210 is not the image shift of the image shift module 314a, and the image shift module 210 is not the image projection lens 314a, and the image shift module 210 is not changed in the image shift of the image projection lens 314a, and the image shift module 210, and the image projection lens 314a, the image projection lens 320 when the image projection lens 314a, the image projection lens 320 is not the image projection lens 314a, the image shift of the image projection lens 314a, the image projection lens 320 is not changed in the image projection lens 314a, the image projection system 210 is not changed in the image projection lens 210, the image 314a, the image projection lens 314, the image shift module 210 is not changed in the image projection lens 210 is not changed in the image 314a, the image projection system 210, the image.

The embodiment of the present invention provides methods for manufacturing an imaging shift module, which includes steps of providing a housing and mounting a th grating switchable between a diffractive state and a non-diffractive state and a second grating switchable between the diffractive state and the non-diffractive state in the housing, wherein the th grating has a nd surface and a second surface corresponding thereto, the th surface receives image light and the image light exits from the second surface, the second grating is located downstream of the th grating in an optical path and has a third surface and a fourth surface corresponding thereto, the third surface receives image light and the image light exits from the fourth surface, an incident direction of the image light incident on the th grating and an exiting direction of the image light exiting from the second grating are substantially shifted by in a direction in a direction, and embodiments of the embodiment of the present invention provide methods for manufacturing an imaging shift module, which includes steps of providing a barrel and mounting a second lens 6329 and a second lens 68692 in a state, and mounting a reflective surface of the second lens barrel closer to an optical axis than a reflective surface of the diffractive surface of the second lens barrel and a reflective surface of the second lens barrel.

By the design of the above embodiments, the diffraction grating formed by the holographic polymer dispersed liquid crystal device is used as the optical path adjusting device, and the effect of pixel image displacement can be obtained without the actuator, so that the problems of high-speed collision, noise, etc. can be avoided and the service life of the device can be prolonged. Moreover, the liquid crystal transition time is short, so that more luminous efficiency can be kept. In addition, the diffraction grating as the light path adjusting element has a simple structure and does not need to be modified with the size of the passive element (such as the light valve).

The term "optical element" as used herein refers to an element made of a material having light reflective properties, typically comprising glass or plastic. For example, the optical element may be a reflective mirror (reflective mirror), a total reflection Prism (TIRPrism), a total reverse reflection Prism set (RTIR Prism), or the like.

The term "light valve" is used in the industry to refer to most of the individual optical cells in Spatial Light Modulators (SLMs). the so-called spatial light Modulator includes a plurality of individual cells (individual optical cells) spatially arranged in -dimensional or two-dimensional arrays, each of which can be controlled independently by optical or electrical signals, and can modulate the illumination light beams illuminating the individual cells and output image light beams by using various physical effects (such as the pockels effect, the kerr effect, the acousto-optic effect, the magneto-optic effect, the electro-optic effect of semiconductors, or the photorefractive effect).

In the projector industry, generally includes Cathode Ray Tube (Cathode Ray Tube) projectors, Liquid Crystal Display (LCD) projectors, Digital Light Projectors (DLP) and Liquid Crystal On Silicon (LCOS) projectors, which are classified according to the difference in the light valves used therein, and belong to a transmissive projector because light passes through the LCD panel as the light valve when the projectors are operated, while projectors using light valves such as DLP and LCOS are called reflective projectors because light is reflected.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.