球形合作目标折射率对激光雷达散射截面影响研究  

Refractive Index of Spherical Cooperative Target Effect on Laser Radar Cross Section

作　　者：张鹏[1] 刘传 董冰[1] 张刚强 丁蕴丰[1,3] 佟首峰 Zhang Peng;Liu Chuan;Dong Bing;Zhang Gangqiang;Ding Yunfeng;Tong Shoufeng(NUERC of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun,Jilin 130022,China;Na tional Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing,Shanghai,201108,China;College of Physics and Electronic Engineering,Hainan Normal University,Haikou,Hainan 570100,China)

机构地区：[1]长春理工大学空间光电技术国家地方联合工程研究中心,吉林长春130022 [2]水声对抗技术重点实验室,上海201108 [3]海南师范大学物理与电子工程学院,海南海口570100

出　　处：《激光与光电子学进展》2022年第7期145-151,共7页Laser & Optoelectronics Progress

基　　金：国防科技重点实验室基金项目(201911XXX401);国防基础科研计划稳定支持项目(JCKYS2020604SSJS012);吉林省教育厅科学技术研究重点项目(JJKH20210820KJ)。

摘　　要：将Lambert-Beer定律引入双向反射分布函数,推导出一种适用于球形合作目标后向激光雷达散射截面的数学计算模型,并以此为理论基依据,建立了用于测量微珠合作目标后向激光雷达散射截面的实验系统,利用该实验系统,开展了对不同材料球形合作目标回波信号相对强度的光谱数据测量,同时采集50 mW、80 mW和300 mW这三个典型发射光功率所对应球形合作目标处的光斑图像。根据光谱数据分析,计算得到不同材料微珠合作目标的后向激光雷达散射截面。研究结果表明,折射率为1.46、1.51、1.93的球形合作目标的激光雷达散射截面均随着激光功率的增加而呈现出线性增长的趋势;当激光功率一定时,折射率为1.93的球形合作目标的激光雷达散射截面要明显大于折射率为1.46和1.51球形合作目标的激光雷达散射截面,该研究结论为激光雷达散射截面的理论研究和实验测量提供一定的理论依据和数据参考。In this paper,we introduce Lambert-Beer law into bidirectional reflectance distribution function in order to deduce a mathematical model for calculating the backscatter cross section of spherical cooperative target.And based on this theoretical basis,the experimental system that for measuring the backscatter cross section of spherical cooperative target is established.Using this test system,the relative intensity spectral data of echo signal of the spherical cooperative target with different materials was measured.At the same time,the spot images of spherical cooperative targets corresponding to the three typical emission power of 50 mW,80 mW,and 300 mW are collected.According to the spectral data analysis,the backscattering cross sections of the cooperative targets with different materials are calculated.The results show that the laser radar cross section of the spherical cooperative target with refractive index of 1.46,1.51,and 1.93 increases linearly with the increase of laser power.When the laser power is constant,the laser radar cross section of the spherical cooperative target with refractive index of 1.93is significantly larger than that of the spherical cooperative target with refractive index of 1.46 and 1.51.This research provides a theoretical basis and data reference for the theoretical research and experimental measurement of the laser radar cross section.

关 键 词：激光光学 合作目标 激光雷达散射截面 光谱数据分析 

分 类 号：TN951[电子电信—信号与信息处理]