介绍了作为大型机载激光雷达关键部件的双光楔扫描系统的模型建立、设计实现以及实验验证。为实现双光楔扫描系统的大尺寸、宽视场和高精度指向, 设计了16°楔角、320 mm直径的成对光楔, 以及对应的高精度PID双轴扫描控制模块, 分析了系统误差来源和误差控制方法。在45 m距离的地面测试中, 通过每个3.6°转动楔镜, 累计100次与真值测量比对进行检校和验证, 扫描指向误差小于50 μrad, 通过搭载集成后的机载激光雷达飞行实验, 实测扫描视场为32.03°, 进一步验证了双光楔扫描系统的有效性。

The modeling, design, implementation and experimental verification of dual-wedge scanning system was introduced, which as the key components of the large airborne LiDAR. In order to achieve large size, wide field of view and high precision pointing of dual-wedge scanner system, the dual-wedge which was 16° wedge angle and 320 mm diameter and corresponding PID biaxial scanning control module were designed, and the sources of system error and error control method were analyzed. In the ground test of 45 m away, rotating wedge mirror every 3.6°, for 100 times, companed with the measurement true value, and through calibration and validation, the scanning point error was less than 50 μrad. The flight experiments are carried loading with the integrated airborne LiDAR, the measured scanning field of view is 32.03°, verifies the validity of dual-wedge scanning system in further.