阅读说明：本技术 一种单列多排等效负折射率平板透镜的加工工艺 (Processing technology of single-row multi-row equivalent negative refractive index flat lens ) 是由 范超 韩东成 张亮亮 于 2018-07-04 设计创作，主要内容包括：本发明提供一种单列多排等效负折射率平板透镜的加工工艺,包括：将光学材料加工成上下表面为抛光面的平行平板；沿平行平板其中一条边切割成条形光波导；将条形光波导的两抛光面镀上铝膜；将各个条形光波导的镀膜面相互贴合形成单列多排条形光波导阵列；将条形光波导阵列置于热敏胶中浸泡,并压紧使贴合面之间的气泡以及多余胶排出；采用加热处理的办法将条形光波导阵列固化；将条形光波导阵列平板切割成沿45°方向排布的两组条形光波导阵列平板；将两组条形光波导阵列平板按照排列方向相互垂直的方式进行胶合后在其两侧添加保护窗片既得。本发明可大大减小传统加工条形光波导之间存在的个体差异,实现拼接阵列清晰三维成像的目的。(The invention provides a processing technology of a single-row multi-row equivalent negative refractive index flat lens, which comprises the following steps: processing an optical material into parallel flat plates with upper and lower surfaces as polishing surfaces; cutting the parallel flat plate into strip-shaped optical waveguides along one edge of the parallel flat plate; plating aluminum films on two polished surfaces of the strip-shaped optical waveguide; coating surfaces of the strip-shaped optical waveguides are mutually attached to form a single-row multi-row strip-shaped optical waveguide array; soaking the strip-shaped optical waveguide array in thermosensitive adhesive, and pressing to discharge bubbles and excess adhesive between the binding surfaces; curing the strip-shaped optical waveguide array by adopting a heating treatment method; cutting the strip-shaped optical waveguide array flat plate into two groups of strip-shaped optical waveguide array flat plates which are arranged along the direction of 45 degrees; and gluing the two groups of strip-shaped optical waveguide array flat plates in a mode that the arrangement directions are mutually vertical, and adding protective window sheets on two sides of the flat plates to obtain the optical waveguide array. The invention can greatly reduce the individual difference existing between the traditional processing strip-shaped optical waveguides and realize the purpose of clear three-dimensional imaging of the spliced array.)

1. A processing technology of a single-row multi-row equivalent negative refractive index flat lens is characterized by comprising the following steps:

(1) processing an optical material into parallel flat plates with upper and lower surfaces as polishing surfaces;

(2) cutting the parallel flat plate into strip-shaped optical waveguides along one edge, wherein the length, the width and the thickness of the strip-shaped optical waveguides meet the following requirements: 10mm < length <200mm, 0.1mm < width <5mm, 0.1mm < thickness <5 mm;

(3) plating aluminum films on two polished surfaces of the strip-shaped optical waveguide;

(4) coating surfaces of the strip-shaped optical waveguides are mutually attached to form a single-row multi-row strip-shaped optical waveguide array;

(5) soaking the strip-shaped optical waveguide array in the thermosensitive adhesive, and pressing the strip-shaped optical waveguide array tightly to discharge bubbles and excess adhesive between the binding surfaces;

(6) taking out the optical waveguide array, and curing the strip optical waveguide array by adopting a heating treatment method to form a strip optical waveguide array flat plate;

(7) processing two surfaces of the strip-shaped optical waveguide array flat plate to form polished surfaces which are parallel to each other, and then cutting the polished surfaces into two groups of strip-shaped optical waveguide array flat plates which are arranged along the direction of 45 degrees;

(8) and gluing the two groups of strip-shaped optical waveguide array flat plates in a mode that the arrangement directions are mutually vertical, and adding protective window sheets on two sides of the flat plates to obtain the optical waveguide array.

Technical Field

The invention belongs to the field of optical manufacturing, and particularly relates to a processing technology of a single-row multi-row equivalent negative refractive index flat lens for realizing air imaging.

Background

With the development of imaging display technology, the requirements for imaging characteristics are continuously increasing. On one hand, higher resolution is required, and the requirement of small distortion is also required while the definition of an observed picture is ensured. On the other hand, the three-dimensional holographic display device has the requirements of naked eye three-dimensional holographic display while requiring three-dimensional stereo display characteristics. On one hand, the existing imaging technology mainly adopts a lens for imaging, is mainly limited by a field of view and an aperture, has optical aberrations such as spherical aberration, coma aberration, astigmatism, field curvature, distortion, chromatic aberration and the like, and is greatly limited in the field of large-field-of-view and large-aperture imaging display. On the other hand, most of the existing naked eye three-dimensional display technologies are based on adjusting left-right eye parallax to realize three-dimensional sense, and are not actual three-dimensional display technologies. The holographic imaging technology has high manufacturing cost.

In order to pursue better display effect and product experience, the invention provides a processing technology of an equivalent negative refractive index flat lens capable of realizing three-dimensional imaging display, and provides technological support for the equivalent negative refractive index flat lens capable of realizing naked eye three-dimensional display. The strip-shaped optical waveguide manufactured by the traditional optical waveguide processing technology has larger individual difference among the waveguides: the deviation of the cross section size is inconsistent, so that the surface of a spliced single-row multi-row equivalent negative refractive index flat lens array for three-dimensional imaging is not smooth, and all areas of an image are sheared; the surface parallelism is inconsistent, and the deflection angles of the optical waveguides to the light rays are unequal, so that multi-pixel distortion and image distortion occur in an imaging area; it is difficult to realize clear three-dimensional imaging.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a processing technology of a single-row multi-row equivalent negative refractive index flat lens, which can greatly reduce the individual difference existing between the traditional processing strip-shaped optical waveguides and realize the purpose of clear three-dimensional imaging of a spliced array. The technical scheme of the invention is as follows:

a processing technology of a single-row multi-row equivalent negative refractive index flat lens comprises the following steps:

(1) processing an optical material into parallel flat plates with upper and lower surfaces as polishing surfaces;

(2) cutting the parallel flat plate into strip-shaped optical waveguides along one edge, wherein the length, the width and the thickness of the strip-shaped optical waveguides meet the following requirements: 10mm < length <200mm, 0.1mm < width <5mm, 0.1mm < thickness <5 mm;

(3) plating aluminum films on two polished surfaces of the strip-shaped optical waveguide;

(4) coating surfaces of the strip-shaped optical waveguides are mutually attached to form a single-row multi-row strip-shaped optical waveguide array;

(5) soaking the strip-shaped optical waveguide array in the thermosensitive adhesive, and pressing the strip-shaped optical waveguide array tightly to discharge bubbles and excess adhesive between the binding surfaces;

(6) taking out the optical waveguide array, and curing the strip optical waveguide array by adopting a heating treatment method to form a strip optical waveguide array flat plate;

(7) processing two surfaces of the strip-shaped optical waveguide array flat plate to form polished surfaces which are parallel to each other, and then cutting the polished surfaces into two groups of strip-shaped optical waveguide array flat plates which are arranged along the direction of 45 degrees;

(8) and gluing the two groups of strip-shaped optical waveguide array flat plates in a mode that the arrangement directions are mutually vertical, and adding protective window sheets on two sides of the flat plates to obtain the optical waveguide array.

Fig. 1 and 2 provide schematic structural diagrams of a single-row multi-row equivalent negative refractive index flat lens obtained by the present invention, the flat lens includes a pair of glass windows respectively having two optical films, and two sets of optical waveguide arrays located between the two glass windows, the optical waveguide arrays are composed of single-row multi-row optical waveguides arranged obliquely at 45 ° and having a rectangular cross section, and the waveguide directions of mutually corresponding portions of the two sets of optical waveguide arrays are perpendicular to each other. The flat lens can enable a two-dimensional or three-dimensional light source to directly realize real imaging in the air and realize real holographic images, and realizes naked eye three-dimensional stereo display characteristics while realizing large field of view, large aperture, high resolution, no distortion and no dispersion.

The invention has the beneficial effects that: the invention can greatly reduce the individual difference existing between the traditional processing strip-shaped optical waveguides and greatly reduce the image shearing defect. The two polished surfaces of the strip-shaped optical waveguide are plated with aluminum films, so that the dependence of the flat lens on the types of optical materials is greatly reduced, and the requirements of a gluing process on bubbles and impurities are reduced. The three-dimensional display characteristics and the naked eye three-dimensional holographic display requirements are met, and the purpose of clear three-dimensional imaging of the spliced array is really achieved.

Drawings

Fig. 1 is a schematic structural diagram of a single-row multi-row equivalent negative refractive index flat lens obtained by the present invention, wherein 1-1 is a schematic structural diagram of the single-row multi-row equivalent negative refractive index flat lens, 1-2 is a partial enlarged view of a region I, IM 0-a first glazing sheet, IM 1-a first group of optical waveguide array panels, IM 2-a second group of optical waveguide array panels, and IM 3-a second glazing sheet.

Fig. 2 is an exploded view of the two sets of optical waveguide array panels of IM1 and IM2 of fig. 1.

Fig. 3 is a schematic view showing the structure of the starting batt in example 1 of the present invention, wherein 1/2/3/4/5/6 indicates six surfaces, L indicates the length, W indicates the width, and H indicates the height.

FIG. 4 is a schematic diagram showing the cutting of the parallel plate in example 1 of the present invention, and d is the thickness of the parallel plate.

Fig. 5 is a schematic diagram of cutting of a strip optical waveguide in example 1 of the present invention, in which L 'denotes a length, W0 denotes a width, and d' denotes a thickness.

Fig. 6 is a schematic structural view of the strip optical waveguide after being coated with the film in embodiment 1 of the present invention.

Fig. 7 is a schematic structural diagram of a slab of a strip optical waveguide array in example 1 of the present invention, where 7-1 is a schematic structural diagram of the slab of the strip optical waveguide array, and 7-2 is a partial enlarged view of a region II.

FIG. 8 is a schematic diagram of imaging of two sets of optical waveguide array panels of IM1 and IM2 in example 2 of the present invention.

FIG. 9 is a schematic diagram of light reflected inside the optical waveguide and focused for imaging, where A/B indicates the two-sided orientation.

Fig. 10 is a schematic diagram of the two groups of optical waveguide array panels in fig. 8, in which 10-1 is a schematic diagram of a principle of convergence of the IM1 optical waveguide array panel single-direction imaging light, and 10-2 is a schematic diagram of a principle of convergence of the IM2 optical waveguide array panel single-direction imaging light.

FIG. 11 is a schematic diagram of the principle of generating stray light and imaging light by the optical waveguide, wherein A/B represents two-sided orientation, B represents stray light beam, and B' represents imaging light beam.

Fig. 12 is a schematic diagram of the principle that each unit of the optical waveguide array is equivalent to a cube R and is influenced by stray light when an object is imaged, wherein b1, b3 and b4 are stray light beams, b2 is an imaging light beam, and a represents an object light beam.

Fig. 13 is a schematic diagram of the principle of avoiding the influence of stray light after the cube R in fig. 12 is rotated by 45 °, wherein b1, b3 and b4 are stray light beams, b2 is an imaging light beam, and a represents an object light beam.

Note: the five-pointed star in the above picture represents a simple image.

Detailed Description

The present invention will now be described in further detail with reference to the following figures and specific examples, which are intended to be illustrative, but not limiting, of the invention.