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探测报知激光威胁源的方向是激光告警必不可少的一项技术指标。针对目前的告警系统的缺点,提出了一种基于柱透镜的高精度激光告警方法,并采用非成像方式对来袭激光进行定向。系统由两个相互垂直的线阵结构组成,线阵结构包括柱透镜组与线阵红外焦平面阵列。告警系统通过来袭激光在线阵焦平面阵列上线斑的偏移量来确定入射激光的水平方位角和俯仰角,从而达到对来袭激光进行定向的目的。文中阐述了该方法的基本原理及系统的结构组成,进行了误差分析,并对光学系统进行了仿真实验。实验结果表明:基于该方法的激光告警系统的视场角达到±16°。该方法对激光告警系统在汽车、飞机以及卫星上的应用具有十分重要的指导意义。
Detecting and reporting the direction of the laser threat source is an indispensable technical indicator for laser warning. In view of the shortcomings of the current alarm system, a high precision laser warning method based on cylindrical lens is proposed and the non-imaging method is used to direct incoming laser. The system consists of two mutually perpendicular linear array structures, including a cylindrical lens array and a linear infrared focal plane array. The alarm system determines the horizontal azimuth and elevation angle of the incident laser light by the offset of the line spot on the laser line array focal plane array so as to achieve the purpose of directing incoming laser light. In this paper, the basic principle of the method and the structure of the system are expounded, the error analysis is carried out, and the optical system is simulated. Experimental results show that the laser warning system based on this method has an angle of field of ± 16 °. This method is very important to the application of laser warning system in cars, airplanes and satellites.