Spherical phase-only hologram generation method based on spherical self-diffraction model

A self-diffraction, pure phase technology, applied in the field of holographic display, to achieve the effect of suppressing the degradation of reconstruction quality and generating an efficient method

Active Publication Date: 2021-11-02
SICHUAN UNIV
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Problems solved by technology

[0003] The present invention aims at the degradation of the reconstruction quality of the above-mentioned spherical phase-only computational hologram due to speckle noise, and proposes a spherical phase-only hologram generation method based on a spherical self-diffraction model

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  • Spherical phase-only hologram generation method based on spherical self-diffraction model

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Embodiment Construction

[0018] A typical embodiment of a method for generating a spherical phase-only hologram based on a spherical self-diffraction model 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.

[0019] The invention proposes a method for generating a spherical phase-only hologram based on a spherical self-diffraction model. The method includes two parts: a spherical self-diffraction calculation model and a spherical self-diffraction iterative algorithm to generate a spherical phase-only hologram.

[0020] The spherical self-diffraction calculation m...

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Abstract

The invention proposes a method for generating a spherical phase-only hologram based on a spherical self-diffraction model. This method first proposes a calculation model of spherical self-diffraction. The diffraction process of this model is that the diffraction field of the object surface propagates to the same object surface through the diffraction of the center of the sphere; The self-diffraction iterative algorithm mainly relies on the amplitude of the object plane to provide the iterative amplitude limit, and the energy conservation of the same object plane is used to ensure the rapid convergence of the iterative algorithm to generate a spherical phase-only hologram that can be reconstructed with high quality. Compared with the traditional iterative algorithm, the reconstructed image of the spherical phase-only hologram generated by this method is of high quality, and the speckle noise of the reconstructed image of the spherical phase-only computational hologram is effectively suppressed.

Description

technical field [0001] The invention relates to a holographic display technology, in particular to a method for generating a spherical calculation hologram. Background technique [0002] As an ideal true three-dimensional display technology, holographic display has been receiving great attention. Spherical computational holography has become a recent research hotspot because of its 360° field of view. But spherical computational holography has a technical problem that needs to be solved urgently. This problem is that spherical computational holography is inevitably plagued by speckle noise. The reason for the speckle noise is that the random phase must be added on the object surface. The speckle noise directly causes the degradation of the reconstructed image quality, especially the degradation of the spherical phase-only holographic reconstruction image quality. The reconstruction image quality degradation of spherical phase-only computational hologram restricts the appli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/08
CPCG03H1/0808G03H1/0866G03H2001/0816G03H2001/0883
Inventor 王君李冰怡
Owner SICHUAN UNIV
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