一种无扫描三维成像激光雷达的实验研究  

Experimental Research on a Scannerless 3D Imaging Laser Radar

作　　者：靳辰飞[1] 赵远[1] 张勇[1] 何姜[1] 孙秀冬[1] 

机构地区：[1]哈尔滨工业大学物理系,黑龙江哈尔滨150001

出　　处：《中国激光》2009年第6期1383-1387,共5页Chinese Journal of Lasers

基　　金：总装预研基金(9140A01040307HT0125)资助项目

摘　　要：研究了一种无扫描三维成像激光雷达。采用脉冲固体激光器作为发射光源,而带有像增强器的CCD(ICCD)作为成像探测器。激光器发射光脉冲的同时用随时间单调变化的高压调制ICCD中的像增强器,使其产生随时间单调变化的增益调制,这样不同距离的目标回波被放大的程度不同。通过对被放大信号能量的比较分析,就可以解算各个脉冲的飞行时间,从而得到各个脉冲对应的距离。结果验证了这种成像系统可有效地消除回波强度不均匀性的影响。通过室内成像实验验证系统成像,在35～41 m的距离上成功地获取了目标的距离像,测距精度可达l m以下。A scannerless 3D imaging laser radar is developed. A pulsed solid state laser is used as source with image intensified CCD （ICCD） as imaging detector. When the laser source transmits light pulse to a target scene, the image intensifier of ICCD is modulated with the monotone time-variant high voltage. High voltage signal controls the image intensifier to produce the monotone time-variant gain modulation, which leads to different amplification factor on return light reflected from different range. By analyzing and comparing the energy of amplified signals, we can calculate the flight time of every return light and then get the range of the corresponding target. Results demonstrate that the system can effectively eliminate the effect of non-uniform of the return light intensity. An indoor imaging experiment is performed for demonstrating the feasibility of system, and range image of targets from 35 to 41 meters distance is successfully acquired and the range accuracy can be less than 1 meter.

关 键 词：激光技术 激光雷达 增益调制 距离像 

分 类 号：TN958.98[电子电信—信号与信息处理]