A polarization multiplexing structured light generating device and a method for preparing the same

CN119781181APending Publication Date: 2025-04-08HANGZHOU NAJING TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202311302109.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-10-07
Publication Date
2025-04-08

AI Technical Summary

Technical Problem

When implementing the lattice and floodlight functions, existing metasurface devices require two light sources and sub-region designs, resulting in large equipment size and high assembly difficulty.

Method used

By adjusting the polarization state of the light source, it forms light with different polarizations on the same metasurface, and using the response of the metasurface to different polarization light, the beam regulation function of lattice and flood light is realized. Specific methods include changing the size and shape of the microstructure, calculating the required metasurface phase distribution, and matching the phase parameters to determine the most suitable microstructure geometry.

Benefits of technology

The beam regulation of the dot matrix and flooding functions is achieved under smaller volumes and reduced assembly difficulty, reducing the number of light sources and reducing costs.

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Abstract

The present application relates to a polarization multiplexing structured light generating device and a preparation method thereof, belonging to the technical field of optical devices. The structured light generating device includes a light source and a metasurface for controlling the polarization of the outgoing light. The metasurface includes a substrate and a metasurface unit placed on the substrate. The phase distribution of the metasurface under different incident polarizations is changed by the type, size and arrangement of the microstructure, and the phase change range is within 0-2π. The present application realizes two different beam control functions, namely, dot matrix and flood light, by adjusting the polarization state of the outgoing light from the light source and utilizing the different responses of the metasurface to the polarization of the incident light.
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Citation Information

Patent Citations

  • Structured light generator and imaging device

    CN218298726U

Cited By

  • Polarization conversion metasurface and design method and device thereof

    CN120491236A

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    CN120629024A