基于盖革APD阵列的微扫描激光成像技术

Microscanning laser imaging technology based on Geiger-mode APD array

盖革APD阵列探测的激光成像雷达具有高灵敏度、高帧频、宽视场、坚固、体积小等优点,成为了激光成像雷达发展的趋势。但目前APD阵列像元填充比低,器件阵列少,无法满足高分辨率激光成像的要求。为了解决该问题文中提出采用激光点阵发射的方法与APD阵列像元一一对应,采用拼接技术提高成像分辨率,采用微扫描技术提高激光成像视场。通过构建实验系统,完成了室外试验,成像效果良好,使用现有APD探测器(32×32)将系统空间分辨率提高了四倍(64×64),提高了激光三维成像能力。

The laser imaging radar based on Geiger APD array detection has the advantages of high sensitivity,high frame frequency,wide field,solid,small volume,and has become the development trend of laser imaging radar.At present,the APD array has fewer pixels and fewer device arrays,which can not meet the requirements of high resolution laser imaging.In order to solve this problem,one-to-one correspondence between laser dot array and APD array pixels was proposed.The imaging resolution was improved by splicing technique,and the laser imaging field was improved by micro scanning technique.By building an experimental system,the outdoor experiment was finished which had good imaging effects.The existing APD detector(32×32)was used to improve the system spatial resolution by four times(64×64),and the ability of laser3D imaging was also improved.