Method for expanding holographic retinal imaging of angle of view

Abstract

The invention discloses a method for expanding holographic retinal imaging of an angle of view, comprising the steps of: 1) calculating a hologram of an object; 2) determining parameters in the optical system, such as a spacing between several point sources, sampling pitch and resolution of a spatial light modulator, focal length of a lens, and position of a filter; 3) laying out a projection device: sequentially arranging a light source group composed of several point light sources, the spatial light modulator, the lens and the filter, wherein the spatial light modulator is connected with a computer; and 4) transmitting the phase hologram to the spatial light modulator through the computer, and then using the spatial light modulator to project the phase hologram into the observer's eyes at a specified position. The holographic retinal imaging method is capable of effectively expanding the field of view of the reconstructed image on the basis of ensuring the quality of the reconstructed image.

Description

technical field [0001] The invention relates to a holographic retinal imaging method for enlarging the viewing angle, and belongs to the technical field of holographic imaging. Background technique [0002] Compared with traditional 3D display technology, holographic display technology is a technology capable of reconstructing the complex amplitude light field of an object, and is therefore considered to be the most ideal next-generation 3D display technology. However, the traditional holographic display technology is limited by the spatial light modulator pixel pitch and device size, resulting in a small field of view. When the human eye moves slightly, it will deviate from the imaging position, be blocked by the diaphragm or interfered by other high diffraction orders, and cannot see a clear reconstruction scene, which greatly hinders the application scenarios of holographic retinal imaging technology. In order to solve this problem, the existing research starts from the ...

AI Technical Summary

Problems solved by technology

However, the traditional holographic display technology is limited by the spatial light modulator pixel pitch and device size, resulting in a small field of view

When the human eye moves slightly, it will deviate from the imaging position, blocked by the diaphragm or interfered by other high-diffraction orders, and cannot see a clear reconstruction scene, which greatly hinders the application scenarios of holographic retinal imaging technology

In order to solve this problem, the existing research starts from the device technology to produce a spatial light modulator with a smaller pixel pitch, which can increase the viewing angle, but in this way, for the commonly used liquid crystal spatial light modulator , the crosstalk between liquid crystals will bring new problems

On the other hand, the existing holographic display technology mostly uses laser as the illumination source, but the laser wavelength range is extremely small, that is, the coherence is very high, which will cause serious speckle in the reconstructed image and affect the imaging quality. Therefore, urgent A new solution is needed to solve this technical problem

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