激光高度计的探测视场角是影响系统性能的一个重要参数, 论述了视场角对系统探测性能的影响.受到回波 杂散光和探测器响应不均匀性的影响, 激光高度计的探测视场会随回波能量的改变而发生变化, 而回波能量随探 测距离发生变化.本文提出了测试激光高度计整机探测视场角的方法, 并且模拟了系统在实际工作状态时的情况; 对于有近程延时保护的系统, 给出了测试的解决方案.对设计视场角为1.5mrad的激光高度计进行了测试, 调节模 拟回波信号能量至5×10 -8 W, 模拟其工作距离为200km时的工作状态, 得出系统的探测视场角为1.46mrad.

Laser altimeter's field of view (FOV) is an important parameter affecting system's performance. The effect of the field of view on the detection performance of system was discussed. Because of the straylight and the sensor's nonuniformity, the FOV changes as the echo's power changes. At the same time the echo's power will be varied with the detecting distance. The testing way of detecting FOV was put forward, and the factual working status was simulated. For system with inner short-range delay protecting circuit, a new method was brought forward. A laser altimeter with the FOV of 1.5mrad was tested. The FOV of the system is 1.46mrad when its detecting distance is 200km and the echo's power is 5×10 -8 W.