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Cylindrical holographic occlusion removing method based on optical path limiting function

A technology of functions and cylinders, applied in the direction of instruments, etc., can solve the problems of low quality and overlapping of reconstructed images, and achieve the effect of high quality of reconstructed images and remarkable effect of de-overlapping

Active Publication Date: 2020-09-04
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

[0003] The present invention aims at the problem of overlapping and low quality of reconstructed images caused by the lack of de-occlusion in the above-mentioned cylindrical holographic technology, and proposes a cylindrical holographic de-occlusion method based on the optical path limit function

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  • Cylindrical holographic occlusion removing method based on optical path limiting function
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Embodiment Construction

[0007] A typical embodiment of a cylindrical holographic de-occlusion method based on an optical path limit function of the present invention will be described in detail below, and the method will be further described in detail. It is necessary to point out here that the following examples are only used to further illustrate the method, and cannot be interpreted as limiting the protection scope of the method. Those skilled in the art make some non-essential aspects of the method according to the method content above. Improvements and adjustments still belong to the protection scope of the present invention.

[0008] The present invention proposes a cylindrical holographic de-occlusion method based on the optical path limiting function. On the basis of the concentric double-cylindrical diffraction model, the method uses the optical path limiting function to limit the point spread function of its diffraction propagation, thereby achieving removal Cylindrical holographic self-occ...

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Abstract

The invention provides a cylindrical holographic occlusion removing method based on an optical path limiting function. According to the method, on the basis of a concentric double-cylindrical-surfacediffraction model, a diffraction propagation point spread function is limited by adopting the optical path limiting function, so that the purpose of removing cylindrical holographic self-occlusion isachieved. The optical path limiting function HOLF is determined by the magnitude relation between the angle direction propagation optical path difference Dop and the system parameter Pc, when the Dopis larger than the Pc, the HOLF is 0, shielding is removed, and otherwise, shielding is not removed. According to the provided de-occlusion method, the quality of the reconstructed image is high, andthe de-overlapping effect is remarkable; meanwhile, the calculation amount additionally increased by the optical path limiting function is very small, and the calculation and generation speed of the cylindrical hologram is not influenced; the method can also be used for cylindrical holographic display of a three-dimensional object based on cylindrical chromatography, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of information optics and signal processing, in particular to a holographic de-shielding method. Background technique [0002] Holography is generally considered to be an ideal 3D display technology because it can provide full parallax and depth information for human eyes. Computational holography is widely used in holographic display because it can record both real objects and virtual objects. However, there is a problem of narrow viewing angle in the field of computational holographic display technology, which is one of the key technical problems to be solved urgently in the field of holographic display. Cylindrical computational holography has attracted the attention of many scholars because it can realize 360-degree display and has broad application prospects. However, the reconstruction quality of cylindrical holography is not high, especially the overlap of the diffraction field and the hologram due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/22
CPCG03H1/22
Inventor 王君李月佳
Owner SICHUAN UNIV
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