偏振微面双向反射分布函数建模与仿真研究  

Modeling and simulation of polarization microfacet bidirectional reflectance distribution function

作　　者：黄宝锐 彭勃 任栖锋[1,3,4] 廖胜[1,3,4] HUANG Baorui;PENG Bo;REN Qifeng;LIAO Sheng(Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;National Key Laboratory of Optical Field Manipulation Science and Technology,Chinese Academy of Sciences,Chengdu 610209,China;Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement,Chinese Academy of Sciences,Chengdu 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光电技术研究所,四川成都610209 [2]电子科技大学光电科学与工程学院,四川成都610054 [3]中国科学院光场调控科学技术全国重点实验室,四川成都610209 [4]中国科学院空间光电精密测量技术重点实验室,四川成都610209 [5]中国科学院大学,北京100049

出　　处：《光学技术》2024年第5期560-566,共7页Optical Technique

基　　金：国家自然科学基金(42304192)。

摘　　要：偏振双向反射分布函数(p-BRDF)可以描述物体表面反射光的空间偏振特性,在许多领域得到了应用。基于微面理论,由微面和物体表面的角度关系以及微面上的菲涅耳反射,对任意偏振状态入射光和反射光的电场振动矢量进行分解与合成,得到偏振反射率pjk,将其作为菲涅耳反射项代入Cook-Torrance BRDF模型中,建立偏振微面BRDF模型。在几何光学模型中引入偏振,模型简单且有明确的物理意义。利用粒子群优化算法,结合黄铜表面的面内BRDF实验数据拟合模型中的参数,参数选取的标准均方误差为0.2820~5.7049%,最佳校正决定系数为0.9957。结果表明,偏振微面BRDF模型用于描述偏振反射特性的准确性和可行性。The polarization Bidirectional Reflectance Distribution Function(p-BRDF) can describe the spatial polarization characteristics of the reflected light on an object's surface,and has been widely used in many fields.Based on the microfacet theory,the electric field vectors of polarized incident and reflected light are decomposed and composed by the angle relationship between the microfacet and the object surface,as well as the Fresnel reflection on the microfacet,to obtain the polarization reflectivity.This is then used as the Fresnel reflection term in the Cook-Torrance BRDF model to establish a polarization microfacet BRDF model.Introducing polarization into geometric optical model is simple and has clear physical meaning.The Particle swarm optimization algorithm is used to fit the parameters in the model with the in-plane BRDF experimental data on the brass surface.The standard mean squared error of the model parameter selection is between 0.2820% and 5.7049%,and the best adjusted R~2 is 0.9957.The results indicate the feasibility of using the polarization microfacet BRDF model to describe the polarization reflection characteristics.

关 键 词：光学测量 偏振双向反射分布函数 微面理论 偏振反射率 粒子群优化算法 

分 类 号：O432[机械工程—光学工程]