激光威胁告警是一种用于截获、测量、识别、定向敌方激光威胁信号并实时告警的光电侦察技术, 是光电对抗技术的重要组成部分。激光威胁告警器能够快速、可靠地识别激光威胁信号, 确定威胁源特性和精确方位, 判明威胁等级, 并迅速产生告警信号, 使光学载荷或卫星有足够的时间采取相应的防御措施, 保护系统免受激光的致命攻击。本文对卫星激光威胁告警技术进行了探讨, 提出了一种基于位置敏感探测器(PSD)的激光威胁方位探测方法。研究结果表明, 这种体制的告警技术对于脉宽50 ns以上的激光脉冲, 可在±1°范围内, 获得优于1 mrad方位分辨力; 而且可以通过光学镜头设计, 扩大接收视场, 满足卫星光学载荷或卫星平台的告警视场需求。

Laser threat warning is a technique for intercepting, measuring, recognizing and direction finding the threatening laser from enemy. It is an important technique for optoelectronic countermeasure. Laser warner is able to recognize the threatening laser, confirm its character, judge threatening level, and quickly give out warning signals, which can provide optical payload or satellite enough time to take effective measures to protect the satellite system against fatal laser attacks. The laser warning technique for satellite is discussed. A threatening direction detect method based on Position Sensitive Device(PSD) is presented. On condition that laser pulse width is greater than 50 ns, an orientation resolution better than 1 mrad can be obtained within ±1°. Through broadening its receiving field by lens optical design, the requirements on the warning field of satellite optical payload or satellite can be satisfied.