基于APD阵列的闪光雷达光学系统设计  

Design of the optical system of flash lidar based on an APD array

作　　者：刘晓波[1] 李丽[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《红外与激光工程》2009年第5期893-896,共4页Infrared and Laser Engineering

基　　金：航天五院创新基金资助项目(CAST200710);航空科学基金资助项目(20070151002)

摘　　要：基于雪崩光电二极管(APD)阵列的闪光雷达是一种非扫描3D成像激光雷达,为实现APD阵列非扫描成像,设计了一套正交光栅衍射分光光学系统。利用伽利略望远镜对532nm脉冲激光进行准直扩束;针对APD阵列的特点,使用二维正交光栅和聚焦透镜对扩束光进行衍射分光,光斑经发射-接收分光镜和发射透镜后照明APD像元的瞬时视场;利用发射-接收分光镜使发射光路与接收光路分开。使用ZEMAX软件对准直扩束和衍射分光部分进行了仿真,并对发射和接收透镜进行了理论分析和计算。设计的光学系统符合32×32像元APD阵列成像的要求。Flash lidar based on an AID array is a kind of three dimensional non-scan imaging laser radar. A beam splitting optical system with a cross grating was designed for the non-scan imaging with APD arrays. The beam from a pulse laser with 532 nm wavelength was collimated and expanded by means of a Galilean telescope. The expanded beam was diffracted and split by the combination of a 2D- transmission cross grating and a focusing lens. The instantaneous field of view （IFOV） of the APD pixel was illuminated by the spot that was formed by the transmitting-receiving beam splitting lens and the transmitting lens. The transmitting and receiving optical paths was separated by the transmitting-receiving lens. The collimation, expansion and diffraction beam splitting system was simulated with ZEMAX software, and the transmitting and receiving lenses were theoretically analyzed and computed. The designed optical system meets the imaging requirement for an APD of 32×32 pixels.

关 键 词：光学设计 光学系统 衍射分光 闪光雷达 

分 类 号：TN958.98[电子电信—信号与信息处理] TH740.2[电子电信—信息与通信工程]