光学技术, 2012, 38 (3): 353, 网络出版: 2012-05-24
剩余反射在激光主动探测中的适用条件分析
Suitability of specular reflection in the laser active detection
摘要
阐述用激光主动探测的原理及实验技术。以红外光学系统为例,运用矩阵光学追迹法对光学系统中各镜片的回波强度、分布及影响因素作定性、定量分析,并用实验加以验证。研究结果表明,回波强度受探测距离、扫描激光光束的入射角等因素影响非常大。例如,在主动扫描装置与被探测观瞄仪器相距约1000m、扫描光束的入射角从0rad增大到0.18rad时,光学系统的前两块透镜表面所产生回波能量与发射脉冲能量之比由理想条件下的28.4%下降到0%。
Abstract
The principle and experimental technique of hiding optical instruments detection based on specular reflection are described. The factors that influence the intensity of the reflection wave are analyzed both quantitatively and qualitatively with the method of ray tracing. The results are validated by experiment. Research results show that the distance of detector and the angle of incidence reduce the intensity of the specular reflection greatly. For example, the ratio of the reflection energy of the first lens to the pulse energy of scanning laser goes down from 28.4% (under the ideal reflection condition) to 0 % respectively, while the distance between the laser scanning setup and infrared camera is 1000 m and the incidence angle of scanning laser is from 0 rad to 0.18 rad.
蒋治国, 樊洋, 张家昌. 剩余反射在激光主动探测中的适用条件分析[J]. 光学技术, 2012, 38(3): 353. JIANG Zhiguo, FAN Yang, ZHANG Jiachang. Suitability of specular reflection in the laser active detection[J]. Optical Technique, 2012, 38(3): 353.