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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 |
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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.
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Received: 20 December 2021
Revised: 01 March 2022
Accepted manuscript online: 17 March 2022
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PACS:
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07.05.Pj
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(Image processing)
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42.30.-d
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(Imaging and optical processing)
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42.68.Wt
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(Remote sensing; LIDAR and adaptive systems)
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Corresponding Authors:
Zijing Zhang, Yuan Zhao
E-mail: zhangzijing@hit.edu.cn;zhaoyuan@hit.edu.cn
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Cite this article:
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 2022 Chin. Phys. B 31 090701
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