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Computational holographic 3D display system and method based on spliced ​​array of spatial light modulators

A display system and array technology, applied in the direction of instruments, etc., can solve the problems of large space occupation, high precision requirements, and influence on holographic reconstruction, etc., and achieve the effect of high precision

Active Publication Date: 2021-08-06
杭州辰景光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the existing multi-chip SLM splicing requires high precision and cannot achieve seamless splicing in the true sense.
In particular, the seamless splicing of more spatial light modulator arrays affects the effect of the entire holographic reconstruction, which cannot achieve the desired holographic reconstruction effect, and the existing SLMs occupy a large space, which is not suitable for the structural design of the holographic projection system Miniaturization and Structure

Method used

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  • Computational holographic 3D display system and method based on spliced ​​array of spatial light modulators

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no. 2 example

[0065] The second embodiment: the SLMs seamless splicing array further includes 3 m *3SLMs array splicing piece is formed by splicing m 3SLMs array splicing pieces, m is a natural number, which further includes:

[0066] One 3SLMs array splicing piece is used as the reference display unit, and the other two 3SLMs array splicing pieces are spliced ​​as the left display unit and the right display unit respectively to obtain a 3*3SLMs array splicing piece;

[0067] The 3*3SLMs array splicing piece is used as the reference display unit, and the other two 3*3SLMs array splicing pieces are used as the left display unit and the right display unit respectively, and the light is reflected to the left 3*3SLMs array splicing piece through the left reflection unit and the right reflection unit respectively and the effective display surface of the right 3*3SLMs array splicing piece;

[0068] The mirror image of the effective display surface of the left 3*3SLMs array splicing piece and the...

Embodiment 1

[0081] Embodiment 1, SLMs array splice

[0082] figure 1 To show the outline structure of the chip, where a 1 is the maximum lateral width (the meaning of "maximum" refers to the measurement of the distance between the outermost edge structures of the shape, the same below); b 1 is the maximum vertical width; h 1 is the maximum thickness; c 1 is the width of the effective display surface; d 1 is the length of the effective display surface. The above five parameters are the basic parameters in the splicing process of the present invention. The basic principle of seamless splicing is to reflect the plane of the effective display area of ​​a display chip to the effective display plane of another display chip through mirror reflection, and connect the edges.

[0083] SLMs array splicing methods include 3 m *3 The splicing of SLMsH array splicing pieces, m is a natural number, which further includes:

[0084] A single SLM display chip is used as a reference display chip uni...

Embodiment 2

[0115] Embodiment 2, a holographic 3D display system based on SLMs array splices

[0116] Figure 13 It is a holographic 3D display system based on SLMs array splicing pieces. The system can be divided into three parts: the illumination optical path ( Figure 14 ), 5*3SLMsH array splices ( Figure 15 ), computational holographic image magnification and viewing angle expansion system ( Figure 16 ).

[0117] The hologram written in the SLMs array splice is read out and diffracted by the parallel light of the illumination light path, and the reconstructed image of the hologram is I hol , I hol The image further enlarged by the lens L is I' hol . The lens L also forms a reduced image I on the effective display plane of the SLMs array splice slms . L Hfun It is a holographic function screen, and its function is to turn the I slms Magnified imaging, its like I' slms Located at the observation plane VP, I' slms is the viewing window for the final 3D image. M3 is a half-...

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Abstract

A computational holographic three-dimensional (3D) display system and method based on a spliced ​​array of spatial light modulators (hereinafter referred to as SLMs), the system comprising: a seamless spliced ​​array of SLMs, a holographic image magnification and viewing angle expansion system, and an illumination system. The SLMs seamless splicing array is formed by splicing a series of single SLM display chips through the principle of mirroring. After splicing, the corresponding edges of the effective display surfaces of each display chip are seamlessly connected, and the edges of each component do not block the incident light. Its function is that the wide-width hologram that meets the requirements of 3D display can be used as a writing signal to spatially modulate the light incident on the SLMs spliced ​​array for holographic reconstruction; the image magnification system consists of an imaging lens, a field lens and a holographic The directional screen is used to magnify the reconstructed image of the computational hologram and expand the field of view; the illumination system provides the writing light incident on the SLMs splicing array, which is a light group composed of a spherical lens and a cylindrical lens. The design goal is to maximize the holographic reconstructed image, make full use of light energy and improve the brightness of the reconstructed image.

Description

technical field [0001] The invention belongs to the technical field of holographic three-dimensional display, and in particular relates to a holographic three-dimensional display system and method of an SLMs (SLM, Spatial Light Modulator, spatial light modulator, SLMs are two or more than two SLMs) array. Background technique [0002] The holographic three-dimensions display technology (The holographic three-dimensions display) is a three-dimensional image display technology that uses the principle of interference to encode the light wavefront of the object to be displayed, and then uses the principle of diffraction to reconstruct the light wavefront of the object. [0003] One of the key technologies of holographic display is how to encode the wavefront information of the object to be displayed into a two-dimensional image, which is the so-called hologram. The Nobel laureate Gable proposed to use the interference principle of light to record the light wave information of ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/22G02B30/00
CPCG03H1/2205G03H1/2294
Inventor 王辉李勇熊骇韬孙利强
Owner 杭州辰景光电科技有限公司
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