伪装涂层红外偏振模型优化及辐射特性研究  

Optimization of Infrared Polarization Model and Study of Radiation Characteristics of Camouflaged Coatings

作　　者：于洁 巩蕾[1] 王海斌 王利国[1] 杨利红[1] 李瑶[1] 阳志强[1] Yu Jie;Gong Lei;Wang Haibin;Wang Liguo;Yang Lihong;Li Yao;Yang Zhiqiang(School of Photoelectric Engineering,Xi’an Technological University,Xi’an 710021,Shaanxi,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《中国激光》2023年第13期103-110,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(62071359,61905187,62001364);陕西省教育厅重点科研计划(20JS059);西安工业大学校长基金面上培育项目(XGPY200206)。

摘　　要：为了表征伪装涂层表面的辐射偏振特性,以Priest Germer(P-G)模型为基础,针对镜面反射和漫反射,建立一种基于几何衰减效应的二分量偏振双向反射分布函数(pBRDF)模型,引入镜面反射系数和漫反射系数,推导出红外辐射线偏振度模型,并对此模型进行校验,结果与实验数据吻合较好。数值分析涂层表面粗糙度、几何衰减效应及漫反射效应对红外线偏振度的影响,结果表明,涂层表面粗糙度越大,由粗糙度引起的遮蔽阴影效应越明显,对应涂层的红外线偏振度越小,且目标涂层的环境辐射与其红外线偏振度呈负相关。上述结果为实现军事伪装和反伪装、目标识别等提供了理论支撑和技术支持。Objective With the continuing development of photoelectric detection technology,infrared polarization technology offers significant advantages,such as cloud penetration and target recognition.Infrared polarization technology has been widely used in stealth,anti-stealth,and military camouflage.The camouflaged target may be more accurately detected using infrared polarization detection since it shows substantial polarization radiation features in the infrared range.In contrast,coating the surface with a depolarization coating can effectively diminish its polarization characteristics,thereby creating a target camouflage.Therefore,investigating the characteristic polarization modeling of camouflage coatings can aid in the effective generation of camouflage and anticamouflage for the target.Most of the shading functions utilized in the current polarization bidirectional reflectance distribution function(pBRDF)are blind simplified models that do not correspond to the actual rough surface elements.Consequently,it is necessary to conduct shading function research consistent with the real scenario.Research on the polarization characteristics of coatings in the extended infrared band,in particular,is still in its infancy and requires further investigation.Methods In this work,an improved shading function model is adopted,and the specular reflection coefficient and diffuse reflection coefficient are introduced to characterize the polarized radiation characteristics of the camouflage coating surface using the PriestGermer(P-G)model.A two-component pBRDF optimization model is established,and a linear polarization degree model of infrared radiation is derived.The numerical calculation results of the model are compared with the experimental data,and the effects of the surface roughness,geometric attenuation,and diffuse reflection on the infrared polarization degree of the coating surface are analyzed numerically.Additionally,the effect of environmental radiation on the infrared polarization characteristics of the coating is ana

关 键 词：激光光学 红外偏振 几何衰减效应 漫反射效应 偏振双向反射分布函数 伪装涂层 

分 类 号：O436.3[机械工程—光学工程]