Color holographic display system based on diffraction distance control and method thereof

Abstract

The invention discloses a color holographic display system based on diffraction distance control and a method of the color holographic display system based on the diffraction distance control. The problem that color crosstalk exists in existing color holographic display is mainly solved. The system comprises a coherent light source array, an expanded beam collimating array, a control unit, a space light modulator array, a diffraction distance control unit and an achromatic lens. The implementation steps of the method comprise the first step of generating monochrome computing holograms, the second step of loading the holograms, the third step of reproducing the holograms and the fourth step of generating a color reproduction image. An optimal Fresnel diffraction distance obtained under different wave lengths in a calculating mode is utilized to generate the three monochrome computing holograms, and Fresnel diffraction with an optimal diffraction distance is respectively carried out on the three monochrome computing holograms. The color holographic display system and the method have the advantages that the hologram loading mode is flexible, light paths are simple and convenient to adjust, and the effect of eliminating the color crosstalk is good.

Description

technical field [0001] The invention belongs to the field of electronic technology, and further relates to a color holographic display system and method based on controlling diffraction distance in the field of photoelectric display technology. The invention can be used for reproducing color computing holograms, eliminating color crosstalk in the reconstructed images of computing holograms and improving imaging quality. Background technique [0002] Computational holography (Computer Generated Hologram) is a new type of holographic imaging and display technology, and its principle is similar to traditional optical hologram. Computational holography calculates and simulates the diffraction and interference process of the light wave field, replaces the traditional holographic recording material with an optical modulation device, simulates the complex amplitude of the diffracted light on a certain plane of the light wave transmission path, and finally obtains the reproduction o...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that complex sampling rate calculations need to be performed before the hologram is generated, which increases the computational complexity. In addition, differential sampling will also reduce the total number of pixels contained in the hologram, resulting in the loss of part of the original information.

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