Near-eye holographic three-dimensional display system and display method

Abstract

The invention provides a near-eye holographic three-dimensional display system and a display method. The near-eye holographic three-dimensional display system comprises a first lens, a spatial light modulator, a 4f system and a display screen. The near-eye holographic three-dimensional display system and the display method have the advantages that three-dimensional scene reconstruction can be achieved by using the simple display system; when the phase hologram corresponding to a three-dimensional field depth image is calculated, the depth information of each pixel point in the field depth image is encoded into quadratic phase information, and the quadratic phase information is loaded to the phase type spatial light modulator; device operation times and data storage are lowered as compared with those of a traditional phase hologram calculation algorithm using a point-element method and chromatography, and operation speed is increased; meanwhile, a two-dimensional image loaded by the display screen is projected to the phase type spatial light modulator through the 4f system, so that each pixel point of the two-dimensional image is modulated by the corresponding quadratic phase factor on the spatial light modulator, the original depth information is given to each pixel point of the two-dimensional image, and image quality is increased greatly.

Description

technical field [0001] The invention relates to the technical field of three-dimensional image display, in particular to a near-eye holographic three-dimensional display system and a display method. Background technique [0002] For the traditional holographic display method, the phase hologram calculated by the classic Gerschberg-Saxton (GS) iterative algorithm is usually loaded on the phase spatial light modulator, and the projection process is to use the lens to transform the light field. Lie transform or Fresnel diffraction to reproduce the light field of a two-dimensional image. And in this technique, the phase hologram can only be projected on a plane parallel to the holographic plane in space, and only two-dimensional images can be projected, which has certain limitations for practical applications. At the same time, traditional 3D stereoscopic display technologies mostly use 2D screens to display composite images or dynamic 2D images, and use the binocular parallax ...

AI Technical Summary

Problems solved by technology

At present, the computational holographic technology for 3D objects is still immature. On the one hand, because the spatial structure of 3D objects is more complex than that of 2D planar objects, it is often difficult to describe the distribution of light waves of objects with specific functions. On the other hand, 3D objects have a huge amount of information. These factors increase the difficulty of 3D object hologram calculation

The current hologram calculation methods for 3D objects have their own characteristics, but they all have limitations to varying degrees.

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