“猫眼”回波功率数值分析模型比较研究  

Comparative study on the numeric models of “Cat's eye” echo power

作　　者：刘明辉[1] 陈青山[1] 李晓英[1] 李响[1] 

机构地区：[1]北京信息科技大学仪器科学与光电工程学院,北京100192

出　　处：《激光杂志》2017年第6期12-15,共4页Laser Journal

基　　金：北京市教委科研项目资助(KM201611232007);北京市自然科学基金资助(4154071);北京市组织部优秀人才项目资助(2014000020124G105)

摘　　要："猫眼"效应现象现已广泛应用于激光主动探测。为了更好地分析基于"猫眼"效应的探测系统的性能,分别采用几何光学与物理光学模型对目标回波功率进行理论分析,建立模型实现数值计算。针对轴上光束在不同传输距离、探测器光敏面分别处在光学系统焦平面和偏离焦平面情况的回波功率做了对比研究,并搭建探测系统进行了实验测试。研究结果表明:探测距离大于100m时,两种模型计算的回波功率吻合较好;小于100m时则存在明显差距;近距离时实验结果与几何模型计算数值更加接近,而远距离时物理光学模型计算结果、几何光学模型计算结果与实测数据非常接近。The phenomenon of ＂cat＇ s eye＂ effect is widely used in active laser detection. In order to achieve bet- ter analysis on the ＂Cat＇s eye＂ effect based detection system, geometrical optics and physical optics based numeric models are separately adopted to analyze the ＂cat＇s eye＂ echo power. The calculated echo power of the ＂Cat＇s eye＂ effect based detection system is also investigated in different transmission distances. An experimental system is set up to test the echo power. The research results show that the echo powers resulted from these two models are in good a- greement only if the transmission distance is longer than 100 meters, while there is an obvious difference. The experi- mental test result and the numerical calculation value by geometric model are approximately the same at short distance, while the test result and the calculation results by two numeric models tend to approach a certain value with the in- crease of distance.

关 键 词：“猫眼”效应 回波功率 主动探测 

分 类 号：TN249[电子电信—物理电子学]