基于全光纤光子计数激光雷达的高分辨率三维成像  

High-resolution three-dimensional imaging based on all-fiber photon-counting Lidar system

作　　者：郭静菁 费晓燕 葛鹏 周安然 王磊[1,2] 李正琦 盛磊[1,2] Guo Jingjing;Fei Xiaoyan;Ge Peng;Zhou Anran;Wang Lei;Li Zhengqi;Sheng Lei(The 38th Research Institute of China Electronics Technology Group Corporation,Hefei 230088,China;Key Laboratory of Aperture Array and Space Application,Hefei 230088,China;No.93209,People’s Liberation Army of China,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088 [2]孔径阵列与空间应用安徽省重点实验室,安徽合肥230088 [3]中国人民解放军93209部队

出　　处：《红外与激光工程》2021年第7期134-143,共10页Infrared and Laser Engineering

基　　金：军队后勤开放研究科研项目(BY119C009);安徽省自然科学基金(2008085QF315)。

摘　　要：为了实现全天时、高分辨率三维成像探测,文中提出了一种工作波长为1 064 nm的光子计数激光雷达系统。其中,光学系统采用全光纤结构,增强了系统稳定性。雷达通过整机扫描方式对远距离目标进行成像探测,扩大扫描视场,水平方向达到360°,俯仰方向达到±30°,同时避免了由摆镜扫描引起的几何畸变;结合亚像素扫描方法,提高空间分辨率。最后通过自适应噪声阈值的多距离重建算法实现了目标的三维重建。实验结果表明,此系统在白天成功实现了3.1 km以外目标的三维重建,重建图像目标特征清晰,距离精度为0.11 m,空间分辨率为0.11 m,超过光学系统衍射极限。A 1064 nm photon-counting Lidar system was experimentally demonstrated to realize high-resolution three-dimensional(3 D)imaging all day.Herein,the optical system was composed of all-fiber components,which improved the system stability.Objects in long distance could be detected by Lidar system through whole machine scanning and the scanning view reached 360°in horizon and±30°in azimuth direction.Also,the geometry distortion was avoided compared to swing mirror scanning.Additionally,the spatial resolution was increased by using a sub-pixel scanning method.Finally,3 D images could be reconstructed by a multi-range reconstruction algorithm with self-adaptive noise threshold.Results showed that a 3 D object 3.1 km away was successfully reconstructed in daytime with clear features.The ranging accuracy was 0.11 m.The spatial resolution was about0.11 m,beyond the diffraction limit of the optical system.

关 键 词：激光雷达 光子计数 三维成像 全光纤 高分辨率 

分 类 号：TN29[电子电信—物理电子学]