激光雷达散射截面的比对测量法及其精度检测  

Relative measurement of laser radar cross section and its accuracy test

作　　者：曲卫东[1,2] 杜自强[3,2] 薛建国[2] 薛挺[2] 王娟锋[2] 

机构地区：[1]清华大学精密测试技术与仪器国家重点实验室 [2]中国人民解放军63880部队 [3]军械工程学院

出　　处：《红外与激光工程》2011年第11期2249-2254,共6页Infrared and Laser Engineering

基　　金：国防“十一五”基本建设基金(020080062)

摘　　要：野外目标激光雷达散射截面(LRCS)的测量通常使用比对测量方法。该方法受到测量系统激光光束模式,激光功率稳定性,大气吸收、散射和湍流,背景的激光漫反射回波,系统探测电路噪声等因素的影响。其中,测量系统激光光束模式是最重要的影响因素,造成了比对测量方法中LRCS测量精度难以客观、全面检测的问题。因此,在介绍LRCS的比对测量法及测试系统的基础上,分析了光束模式对系统LRCS测量精度的影响,提出了消光布遮蔽法和光斑分析法相结合的系统LRCS测量精度检测方法。最后,对实际应用中如何减小光斑模式的影响以提高系统LRCS测量精度进行了分析。The relative measurement is commonly used in measurement of laser radar cross section （LRCS） of a field target. It is effected by some factors, such as light beam mode of laser in measuring system, stability of laser power, atmospheric absorption, scattering and turbulence, laser reflection of background, circuit noise, etc. Laser beam mode is most important in these factors, causing the accuracy of LRCS measurement hard to test objectively. In order to solve this problem, the relative measurement of LRCS and its test system were introduced firstly. Then the effect of laser beam mode on system accuracy was discussed. Finally, the test method of system accuracy that combined shadowing method by using extinction cloth and laser spot image analyzing method was introduced. In addition, how to reduce the effect of light beam mode on system accuracy was analyzed.

关 键 词：激光雷达散射截面 测量精度 光束模式 标准漫反射板 

分 类 号：TN24[电子电信—物理电子学]