光学学报, 2009, 29 (9): 2584, 网络出版: 2009-10-09
机载扫描激光雷达的研制
Study on Airborne Scanning Ladar
光学制造 激光雷达 成像 检流计扫描镜 时间间隔测量电路 optical fabrication ladar imaging galvanometer-scanning mirror time-of-flight counting circuits
摘要
研制了一台机载三维激光雷达系统，它采用Nd:YAG高重频激光器作为光源，检流计和摆镜构成扫描机构，C30659-1060-R8B雪崩激光二极管作为望远镜回波探测，Si的PIN管作为发射光触发脉冲的探测，时间间隔测量卡用来探测距离。探测的距离精度35 cm, 振镜摆动频率:50 Hz(光学角±10°),20 Hz(光学角±25°);振镜摆动角度:机械摆角±12.5°(实现光学摆角±25°);回波强度8 bit;高重复频率累加可以得到三维的距离和强度信息。
Abstract
The compact 3-D imaging ladar system was established, which uses high PRF laser pulses and a C30659-1060-R8B avalanche photo-diode (APD) detectors with independent digital time-of-flight counting circuits. The scanner uses galvanometer-oscillating mirror. Range resolution is 35 cm and scanner angle is 0~±25°. Scan frequency is: 20 Hz for±25°,50 Hz for±10°. With appropriate optics, the digital time value represents a 3-D spatial image frame of the scene. Successive image frames illuminated with the multi-kilohertz pulse repetition-rate laser are accumulated into range histograms to provide 3-D volume and intensity information.
王建宇, 洪光烈, 卜弘毅, 徐卫明, 肖功海, 何志平, 林均仰, 舒嵘. 机载扫描激光雷达的研制[J]. 光学学报, 2009, 29(9): 2584. 王建宇, 洪光烈, 卜弘毅, 徐卫明, 肖功海, 何志平, 林均仰, 舒嵘. Study on Airborne Scanning Ladar[J]. Acta Optica Sinica, 2009, 29(9): 2584.
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