Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging

doi:10.1088/1674-1056/ac5e96

中国物理B ›› 2022, Vol. 31 ›› Issue (9): 90701-090701.doi: 10.1088/1674-1056/ac5e96

Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging

Jiaheng Xie(谢佳衡), Zijing Zhang(张子静)^†, Mingwei Huang(黄明维),Jiahuan Li(李家欢), Fan Jia(贾凡), and Yuan Zhao(赵远)^‡

School of Physics, Harbin Institute of Technology, Harbin 150001, China

收稿日期:2021-12-20 修回日期:2022-03-01 接受日期:2022-03-17 出版日期:2022-08-19 发布日期:2022-09-03
通讯作者: Zijing Zhang, Yuan Zhao E-mail:zhangzijing@hit.edu.cn;zhaoyuan@hit.edu.cn

Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging

Jiaheng Xie(谢佳衡), Zijing Zhang(张子静)^†, Mingwei Huang(黄明维),Jiahuan Li(李家欢), Fan Jia(贾凡), and Yuan Zhao(赵远)^‡

School of Physics, Harbin Institute of Technology, Harbin 150001, China

Received:2021-12-20 Revised:2022-03-01 Accepted:2022-03-17 Online:2022-08-19 Published:2022-09-03
Contact: Zijing Zhang, Yuan Zhao E-mail:zhangzijing@hit.edu.cn;zhaoyuan@hit.edu.cn

摘要/Abstract

摘要： Photon-counting LiDAR using a two-dimensional (2D) array detector has the advantages of high lateral resolution and fast acquisition speed. The non-uniform intensity profile of the illumination beam and non-uniform quantum efficiency of the detectors in the 2D array deteriorate the imaging quality. Herein, we propose a photon-counting LiDAR system that uses a spatial light modulator to control the spatial intensity to compensate for both the non-uniform intensity profile of the illumination beam, and the variation in the quantum efficiency of the detectors in the 2D array. By using a 635 nm peak wavelength and 4 mW average power semiconductor laser, lab-based experiments at a 4.27 m stand-off distance are performed to verify the effectiveness of the proposed method. Compared with the unmodulated method, the standard deviation of the intensity image of the proposed method is reduced from 0.109 to 0.089 for a whiteboard target, with an average signal photon number of 0.006 per pixel.

关键词: avalanche photodiode camera, photon counting, three-dimensional imaging, array modulation

Abstract: Photon-counting LiDAR using a two-dimensional (2D) array detector has the advantages of high lateral resolution and fast acquisition speed. The non-uniform intensity profile of the illumination beam and non-uniform quantum efficiency of the detectors in the 2D array deteriorate the imaging quality. Herein, we propose a photon-counting LiDAR system that uses a spatial light modulator to control the spatial intensity to compensate for both the non-uniform intensity profile of the illumination beam, and the variation in the quantum efficiency of the detectors in the 2D array. By using a 635 nm peak wavelength and 4 mW average power semiconductor laser, lab-based experiments at a 4.27 m stand-off distance are performed to verify the effectiveness of the proposed method. Compared with the unmodulated method, the standard deviation of the intensity image of the proposed method is reduced from 0.109 to 0.089 for a whiteboard target, with an average signal photon number of 0.006 per pixel.

Key words: avalanche photodiode camera, photon counting, three-dimensional imaging, array modulation

中图分类号: (Image processing)

07.05.Pj

42.30.-d (Imaging and optical processing) 42.68.Wt (Remote sensing; LIDAR and adaptive systems)

Jiaheng Xie(谢佳衡), Zijing Zhang(张子静)^†, Mingwei Huang(黄明维),Jiahuan Li(李家欢), Fan Jia(贾凡), and Yuan Zhao(赵远)^‡. Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging[J]. 中国物理B, 2022, 31(9): 90701-090701.

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Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging

Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging

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