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Three-dimensional display method and device based on quasi-random constructive interference

A constructive interference, three-dimensional display technology, applied in optics, instruments, electrical components, etc., can solve the problems of phase adjustment error, phase adjustment range less than 2π, waste of light energy, etc., to suppress the generation of secondary diffraction images , The effect of improving the utilization rate of light energy and simplifying the structure

Active Publication Date: 2012-08-22
李志扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For another example, if the existing commercialized two-dimensional flat liquid crystal display is used to build the three-dimensional display device based on random constructive interference proposed by the invention, there will be some difficulties, because the existing commercialized two-dimensional flat liquid crystal display when they work When the phase adjustment is the main mode, the phase adjustment range is often less than 2π, generally only 3π / 2, which will cause serious phase adjustment errors
In addition, when a microlens array is used to focus the pixels of an existing commercialized two-dimensional flat liquid crystal display to obtain point light sources whose positions are randomly distributed, the diameter of the microlens must be much smaller than the pixel size of the liquid crystal display, so that the microlens Only then can it move randomly within a pixel range, but this will cause a huge waste of light energy

Method used

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  • Three-dimensional display method and device based on quasi-random constructive interference
  • Three-dimensional display method and device based on quasi-random constructive interference
  • Three-dimensional display method and device based on quasi-random constructive interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 A schematic diagram of a three-dimensional display device based on quasi-random constructive interference using three transmissive liquid crystal display panels is given. It consists of a coherent light source 1 , an illumination optical system 2 , an array of amplitude and phase regulators 3 and an array of coherent sub-light source generators 4 . The illumination optical system 2 expands and converts the thin laser beam emitted by the coherent light source 1 into a wide laser beam, and uniformly illuminates the amplitude and phase adjuster array 3 . Amplitude phase adjuster array 3 is made up of first, second, third transmissive liquid crystal panels 5, 6, 7 and first, second, third polarizers 8, 9, 10, the first polarizer 8, the first A transmissive liquid crystal panel 5, a second transmissive liquid crystal panel 6, a second polarizing plate 9, a third transmissive liquid crystal panel 7 and a third polarizing plate 10 are placed close to each other in se...

Embodiment 2

[0040] Combine below figure 1 The given device describes the three-dimensional display method based on quasi-random constructive interference, a three-dimensional display method based on quasi-random constructive interference, which includes the following steps:

[0041] A: Decompose the three-dimensional image 11 into M discrete image points with a certain spatial position and brightness, and use non-periodic division in the decomposition process, so that the positions of the discrete image points are randomly distributed. figure 1 In M=21;

[0042] B: Select a discrete image point m in step A, and set an additional phase Ф for the discrete image point m , the additional phase Ф m Randomly distributed within the range of 0 to 2π;

[0043] C: from figure 1 In the coherent sub-light source array whose spatial position is periodically distributed in the device shown, according to the brightness of the specific discrete image point m selected in step B, a number of coherent s...

Embodiment 3

[0051] Such as figure 2 As shown, if an existing commercialized liquid crystal display is used, each pixel (shown by the dotted line box in the figure) is composed of three sub-pixels 12, 13 and 14, and these three sub-pixels are vapor-deposited with red, green and blue filter light respectively. film, which forms a color image by combining the three primary colors. When the microlens is aligned with each pixel, the center of the optical axis of the microlens coincides with the center of the sub-pixel 13 in the middle, but deviates from the centers of the upper and lower sub-pixels 12 and 14 in the figure. suppose figure 2 The three sub-pixels 12, 13 and 14 respectively correspond to the three primary colors of red, green, and blue, and are illuminated by parallel light. After being converged by the microlens, the three primary color point sources are respectively generated, but the light cones emitted by these point sources will point to different directions. Among them, t...

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Abstract

The invention discloses a three-dimensional display method and device based on quasi-random constructive interference. In the invention, a sub-light beam array is generated by adopting an amplitude phase adjustor array; a coherence sub-light source array is formed by gathering the sub-light beam array with a coherence sub-light source generator array which is aligned to the amplitude phase adjustor array; a single scattered stereoscopic image is formed through the constructive interference of coherence sub-light sources, and the positions of the coherence sub-light sources are randomly distributed; and the pixel position and phase of the scattered stereoscopic image are randomly arranged to eliminate a secondary diffraction image. The three-dimensional display method and device disclosed by the invention can adopt a liquid crystal display with low resolution to realize the real-time color display of a suspension stereoscopic image with a large dimension and can be widely applied to the fields of the three-dimensional display of a computer or a television, three-dimensional man-machine exchange, robot vision and the like.

Description

technical field [0001] The present invention relates to the technical field of three-dimensional imaging, and more specifically relates to a three-dimensional display device based on the principle of quasi-random constructive interference, which is especially suitable for computer and TV display screens, intelligent man-machine exchange, robot vision, etc., and can be widely used in teaching , scientific research, entertainment, advertising and other fields. Background technique [0002] In the past 10 to 20 years, liquid crystal display technology has been developed rapidly, from projected liquid crystal display panels of a few tenths of inches to flat-panel liquid crystal displays of tens of inches have been commercialized. However, the existing liquid crystal displays are mainly used for two-dimensional flat display. Even small-sized projector liquid crystal panels have pixel sizes on the order of ten microns. Compared with visible light wavelengths, their resolution is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B35/00G02B27/26G02F1/13G02F1/21H04N13/00G02B30/25
Inventor 李志扬
Owner 李志扬
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