涂层材料的偏振光谱反射特性分析  

Analysis on polarization spectral reflectance properties of coating materials

作　　者：李兆兆[1,2] 武文远[1,2] 黄雁华[1,2] 杨云涛[1] 范化喜[1] 

机构地区：[1]解放军理工大学理学院,江苏南京211101 [2]解放军理工大学电磁环境效应与光电工程国家级重点实验室,江苏南京210007

出　　处：《激光与红外》2017年第5期575-581,共7页Laser & Infrared

基　　金：国防科技重点实验室基金项目(No.FD2015010)资助

摘　　要：绿色涂层是重要的军事伪装材料。本文基于偏振探测理论,通过高光谱反射偏振实验测量,对比分析了深绿与中绿两种涂层材料的反射与偏振特性,得到了它们的二向反射函数、线偏振度随波长的变化规律,以及二向反射函数BRF与线偏振度DOLP之间的相互关系。结果表明:(1)相比近红外波段,两种涂层在可见光波段的BRF差异较明显,镜面反射的探测角较容易区分两种涂层;(2)当入射角不变时,涂层线偏振度随着探测角增大而增大;随着入射角的减少(或镜面反射的探测角减小),深绿与中绿涂层的DOLP差异增大;(3)涂层的BRF与DOLP的变化在400~1000 nm波段具有负相关性。Green coatings are an important military camouflage material. Based on the theory of polarization detection, polarization properties and reflection properties of deep green and medium green coatings were compared and analyzed by the polarization experiments of hyper spectral reflectance, and the change rule of bidirectional reflectance function and linear polarization degree with the wavelengths was obtained;the relationship between bidirectional reflectance function BRF and linear polarization degree DOLP was also obtained. The results show that： （ 1 ） Compared with the near-infrared band, the BRF difference between two coatings in the visible band is obvious, and detection angle of specular reflection is easier to distinguish the two coatings. （2） When the incident angle is constant, the linear polari- zation degree of coating increases with the increase of detection angles. With the reduction of the incident angle or de- tection angle of specular reflection, the difference of DOLP between green and medium green coatings increases. （3） The BRF and DOLP changes of coatings have negative correlation in the 400 - 1000nm bands.

关 键 词：涂层 高光谱 二向反射函数 线偏振度 

分 类 号：O436.3[机械工程—光学工程]