Single-shot 3D imaging with point cloud projection based on metadevice

Xiaoli Jing, Ruizhe Zhao, Xin Li, Qiang Jiang, Chengzhi Li, Guangzhou Geng, Junjie Li, Yongtian Wang and Lingling Huang ()
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Xiaoli Jing: Beijing Institute of Technology
Ruizhe Zhao: Beijing Institute of Technology
Xin Li: Beijing Institute of Technology
Qiang Jiang: Beijing Institute of Technology
Chengzhi Li: Beijing Institute of Technology
Guangzhou Geng: Chinese Academy of Sciences
Junjie Li: Chinese Academy of Sciences
Yongtian Wang: Beijing Institute of Technology
Lingling Huang: Beijing Institute of Technology

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Three-dimensional (3D) imaging is a crucial information acquisition technology for light detection, autonomous vehicles, gesture recognition, machine vision, and other applications. Metasurface, as a subwavelength scale two-dimensional array, offers flexible control of optical wavefront owing to abundant design freedom. Metasurfaces are promising for use as optical devices because they have large field of view and powerful functionality. In this study, we propose a flat optical device based on a single-layer metasurface to project a coded point cloud in the Fourier space and explore a sophisticated matching algorithm to achieve 3D reconstruction, offering a complete technical roadmap for single-shot detection. We experimentally demonstrate that the depth accuracy of our system is smaller than 0.24 mm at a measurement distance of 300 mm, indicating the feasibility of the submillimetre measurement platform. Our method can pave the way for practical applications such as surface shape detection, gesture recognition, and personal authentication.

Date: 2022
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DOI: 10.1038/s41467-022-35483-z

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