基于声光扫描的三维视频激光雷达技术  

Three-Dimensional Video Imaging Lidar System based on Acousto-Optic Laser Scanning

作　　者：罗远[1,2] 贺岩[1] 胡善江[1] 臧华国[1] 尚建华[3] 万渊[1] 陈卫标[1] 

机构地区：[1]中国科学院上海光学精密机械研究所上海市全固态激光器与应用技术重点实验室,上海201800 [2]中国科学院大学,北京100049 [3]东华大学信息学院,上海200051

出　　处：《中国激光》2014年第8期21-27,共7页Chinese Journal of Lasers

基　　金：国家重大科学仪器设备开发专项任务(2012YQ18012202)

摘　　要：提出一种基于声光扫描技术实现三维视频激光雷达系统,克服了基于传统扫描方式的三维成像激光雷达应用中所面临的成像速度慢、体积大、质量大等问题。采用二维声光扫描技术,大大提高了扫描速度;同时,采用高精度的时间差检测芯片,精确测量激光脉冲飞行时间,从而获得高精度的距离值,实现高精度的三维视频成像。详细描述了系统的原理、组成部分以及实验结果。在图像分辨率为63pixel×63pixel时,该系统三维成像速度达到25frame/s,实现视频三维成像,能够满足对成像速度要求较高的特殊场合的需求。A new three-dimensional video imaging lidar system based on acousto-optic laser scanning is presented, this system solves the problems of low imaging speed, large volume, and large quality which exist in the lidar system based on the traditional scanning method. Using two-dimensional acousto-optic scanning technology, the scanning speed can be improved. At the same time, high precision time detection chip is used to measure the time of laser pulse flight, in order to gain the distance of the target with high precision. So high precision and video-frequency three dimensional images is achieved. The principle of the system, system components, and the experimental results are described in detail. When the image resolution is 63 pixel× 63 pixel, the imaging speed is 25 frame/s, and that can satisfy the demand of high imaging speed requirements for some special situation.

关 键 词：成像系统 声光扫描 三维成像 激光雷达 非机械扫描 高重频光纤激光器 飞行时间法 

分 类 号：TN959.3[电子电信—信号与信息处理]