为了研究用激光主动扫描法侦察远方飞航导弹来袭方位的原理及实验技术,以红外点源导引头光学系统为例,运用矩阵光学追迹法对影响“猫眼”效应回波强度的因素作定性、定量分析。研究结果表明,回波强度受导引头光路中光学镜头相对孔径、摄像管靶面倾斜和离焦的影响较大,扫描激光光束的入射角等因素对回波强度也有一定影响。在主动扫描装置距被探测导引头约10000m、扫描光束的入射角为0.08rad条件下,反射面离焦及倾斜使得侦察装置接收到的回波能量与发射脉冲能量之比由理想条件下的43.80%分别下降到1.53%和 0% 。这一结果对“猫眼”效应用于主动式侦察的原理在导弹来袭告警系统中的应用是有帮助的。

In order to study the detection principle and experimental technique of the attack directions of cruise missiles based on “cat’s eye” effect,the factors that affecting the intensity of the reflection wave were analyzed both quantitatively and qualitatively with the method of ray tracing.Research results show that the relative aperture of optical lens,the incline and defocusing of reflection plane in infrared seeker optical system reduce the intensity of the “cat’s eye” reflection.For example,the ratio of the reflection energy of TV seeker and the pulse energy of scanning laser goes down from 43.80% (under the ideal reflection condition) to 1.53%(for the defocusing) and 0%(for the incline) respectively,while the distance between the laser scanning setup and TV seeker is 10000m and the incidence angle of scanning laser is 0.08rad.This results may be useful for the application of missile’s optical warning system.