Volume holographic grating spatial diffraction efficiency distribution result determination method and device, and medium

By rotating and calculating the beam vector multiple times, the three-dimensional spatial diffraction efficiency distribution of the volume holographic grating is determined, solving the problem that the three-dimensional diffraction efficiency cannot be determined in the existing technology and optimizing the design of volume holographic optical elements.

CN121522880APending Publication Date: 2026-02-13ZHEJIANG CRYSTAL OPTECH
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Patent Information

Application Number
CN202411101841.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-12
Publication Date
2026-02-13

AI Technical Summary

Technical Problem

Existing technologies cannot determine the diffraction efficiency distribution of volume holographic gratings in three-dimensional space, which makes it impossible to reveal their complete angular bandwidth and limits the design and optimization of volume holographic optical elements.

Method used

By rotating the beam vector multiple times, the angle between the rotated vector and the Z-axis in the two-dimensional coordinate system is determined. Combined with the Bragg offset angle and the preset deviation wavelength, the diffraction efficiency corresponding to each incident angle is calculated, thereby determining the three-dimensional spatial diffraction efficiency distribution of the volume holographic grating.

Benefits of technology

The complete angular bandwidth of the volume holographic grating was revealed, the design of volume holographic optical elements was optimized, and the accurate calculation of diffraction efficiency in three-dimensional space was achieved.

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Abstract

The invention provides a volume holographic grating spatial diffraction efficiency distribution result determination method and device and a medium, and the method comprises the steps: carrying out the multiple rotation of a vector of a first light beam, and determining a first included angle between the rotated vector of the first light beam and a Z axis in a two-dimensional coordinate system, an equivalent plane where the vector of the first light beam is located after multiple rotation is located in a two-dimensional coordinate system; rotating the vector of the second light beam for multiple times, and determining a second included angle between the rotated vector of the second light beam and the Z axis; and according to the first included angle, the second included angle and a preset deviation wavelength, determining diffraction efficiency corresponding to each incident angle in the space, and according to the diffraction efficiency corresponding to each incident angle, obtaining a volume holographic grating space diffraction efficiency distribution result. The complete angle bandwidth of the volume holographic grating is disclosed, so that the volume holographic optical element is optimally designed based on the diffraction efficiency distribution result of the volume holographic grating in the three-dimensional space.
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Citation Information

Patent Citations

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  • Volume holographic grating and grating vector distribution formulating and manufacturing method and manufacturing device thereof

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  • Stage linked body holographic grating intensive WDM implement manufacture and system thereof

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