“猫眼”效应用于主动式激光侦察的适用条件分析

阐述了用激光主动扫描法侦察远方(隐蔽的)观察、瞄准仪器的原理及实验技术。以红外物镜为例,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,回波强度受光学仪器内部反射面倾斜和离焦的影响较大,扫描光束的入射角和物镜相对孔径等因素对回波强度也有一定影响。例如在主动扫描装置距被探测观瞄仪器约1000m、扫描光束的入射角为0.3 rad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3.3%分别下降到0.03%和0.016%。

Suitability of "Cat's eye" effect for reconnaissance by the scanning laser

The principle and experimental technique of hiding optical instruments detection based on "Cat's eye" effect were described.The factors that influence the intensity of the reflection wave were analyzed both quantitatively and qualitatively with the method of ray tracing.Research results show that the incline and defocusing of reflection plane in optical instrument(such as telescope and camera) reduce the intensity of the "Cat's eye" reflection.For example,the ratio of the reflection energy of optical instrument and the pulse energy of scanning laser decreases from 3.3%(under the ideal reflection condition) to(0.03%)(for the defocusing) and 0.016%(for the incline) respectively,while the distance between the laser scanning setup and infrared camera is 1000m and the incidence angle of scanning laser is 0.3rad.