A method and system for optimizing out-of-focus phenomenon based on LED holographic display

Abstract

Embodiments of the present invention provide a method and system for optimizing out-of-focus phenomenon based on LED holographic display. The method includes: obtaining an LED reference light source, inputting the LED reference light source into a reference light pre-dispersion system to obtain a pre-dispersion reference light; obtaining a preset image set of a target object, performing diffraction for two-dimensional wavelength distribution correction, and generating corrected Computing a hologram; inputting the corrected computing hologram and the pre-dispersed reference light to a spatial light modulator to obtain a reconstructed image of the target object. The embodiment of the present invention reduces the "color blur" phenomenon caused by the spectral width of the light source by referring to the light pre-dispersion system, and corrects the tilt of the imaging plane caused by the change of the optical path by improving the algorithm for generating a computational hologram, reducing the The out-of-focus imaging result significantly improves the imaging quality.

Description

technical field [0001] The invention relates to the technical field of photoelectric holography, in particular to a method and system for optimizing out-of-focus phenomenon based on LED holographic display. Background technique [0002] In traditional holographic technology, it is necessary to perform interference photography, use a holographic dry plate to record interference fringes, and then irradiate the holographic dry plate with reference light to obtain a reconstructed image. The real-time and repeatability are relatively poor, and the application scenarios are very limited. After 1980, with the advancement of computer technology and the emergence of spatial light modulators, computational holography technology has developed rapidly. The computer-encoded computational hologram can be input to the spatial light modulator, and the spatial light can be irradiated by reference light. The modulator obtains the reconstructed image of the target object. Computational hologr...

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Problems solved by technology

At the same time, the use of 4F filtering system can reduce the influence of "color blur". This operation actually eliminates a large number of components of different wavelengths through filtering, reduces the spectral width of the entire reference light, and improves the temporal coherence of the reference light. , but at the same time it also caused a large amount of light energy loss, resulting in the brightness of the reproduced image being too low, making it difficult for the human eye to directly watch

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