空间光调制器扫描接收的距离选通成像激光雷达  

Range-Gated Imaging LiDAR by Scanning Reception of Space Light Modulator

作　　者：何志毅[1,2] 黄裕 张雨益 何宁[2] Zhiyi He;Yu Huang;Yuyi Zhang;Ning He(School of Information and Communication,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China;Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]桂林电子科技大学广西无线宽带通信与信号处理重点实验室,广西桂林541004

出　　处：《光学学报》2020年第12期1-7,共7页Acta Optica Sinica

基　　金：国家自然科学基金(61961008);广西研究生科研创新项目(YCSW2019140)。

摘　　要：激光距离选通的扫描式成像技术具有低成本、能避免多次散射等特点,成像扫描与激光束扫描的同步配合是扫描成像技术的难点。设计了一个基于空间光调制器(SLM)的扫描式距离选通激光雷达系统,保证目标反射光的可靠接收,并在时间上和空间上屏蔽后向散射光。在具有不同衰减长度的光散射环境中对本系统进行了测量,实现二维和三维成像。实验结果表明,本系统能够有效地实现光束扫描与距离选通成像扫描的同步,适用于光散射环境中光学成像的可视距离扩展。Laser range-gated scan-type imaging technology has the advantages of lower cost and multiple scattering reduction.Synchronous operation between imaging scan and laser-beam scan is the technical difficulty in the scanning imaging technology.Herein,a scan-type range-gated LiDAR system based on spatial light modulator(SLM)is designed to temporally and spatially shield backscattered light while ensuring the reliable receipt of reflected light from the targes.Measurements are performed in light scattering environments with different attenuation lengths to realize the 2D and 3D imaging implementations.Experimental results show that the synchronization between light-beam scan and range-gated imaging scan can be effectively achieved in this system.Moreover,the proposed system is applicable to visible-range extension of optical imaging in a light scattering environment.

关 键 词：大气光学 扫描激光雷达 距离选通成像 空间光调制器 多次光散射 

分 类 号：TN249[电子电信—物理电子学]