A Holographic 3D Display System Based on Virtual Array Splicing of Spatial Light Modulators

Abstract

The present invention proposes a holographic 3D display system based on virtual array splicing of spatial light modulators. The system includes a laser, beam splitter 1, beam splitter 2, mirror 1, shutter array, spatial filter array, solid lens, beam A deflection element 1, a spatial light modulator, a beam splitter 3, a beam deflection element 2 and a mirror 2. Among them, lasers are used to generate coherent light beams. The beam splitter 1, the beam splitter 2 and the mirror 1 are used to divide the beam generated by the laser into three parallel beams and illuminate the shutter array. The shutter array is used to control the three beams of light to pass sequentially according to the set time sequence. The spatial filter array and the solid lens are used to respectively expand the three beams passing through the shutter array into three parallel beams with the same size and uniform intensity. The diffracted light of the spatial light modulator that controls the three moments is seamlessly spliced ​​in space. When the switching speed is fast enough, according to the visual persistence effect of the human eye, the viewer sees the diffracted light spliced ​​by the virtual array of spatial light modulators .

Description

1. Technical field [0001] The present invention relates to holographic display technology, and more specifically, the present invention relates to a holographic 3D display system based on spatial light modulator virtual array splicing. 2. Background technology [0002] The holographic display technology that can reconstruct all the wavefront information of any 3D object is considered to be one of the most ideal 3D display methods, but limited by the pixel size of the current spatial light modulator, the current holographic reconstruction image based on a single spatial light modulator The viewing area and display size are very small, which is difficult to meet viewing needs. To solve this problem, researchers have proposed many schemes. For example, the space-division multiplexing technology of splicing surfaces of multiple spatial light modulators is used to obtain holographic reconstruction images of large viewing areas. Although this technology effectively expands the v...

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Problems solved by technology

In addition, with the rapid development of metasurface technology in recent years, there are more and more schemes to use metasurface materials to expand the size of holographic reconstruction images, but the processing procedures of the materials involved in the schemes are generally complicated and the cost of materials is high , the practical application of large-scale holographic display still needs further research

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