基于改进型Blinn遮蔽函数的目标材料表面可见光偏振反射研究  

Visible polarized reflection of target material surface based on improved Blinn masking function

作　　者：刘承麟 战俊彤[1] 张肃[1] 王超[1] 付强[1] 李英超[1] 段锦[3] 姜会林[1] LIU Cheng-lin;ZHAN Jun-tong;ZHANG Su;WANG Chao;FU Qiang;LI Ying-chao;DUAN Jin;JIANG Hui-lin(National and Local Joint Engineering Research Center for Space Optoelectronics Technology,Jilin Key Laboratory of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,China;School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;School of Electronics and Information Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学吉林省空间光电技术重点实验室空间光电技术国家与地方联合工程研究中心,吉林长春130022 [2]长春理工大学光电工程学院,吉林长春130022 [3]长春理工大学电信学院,吉林长春130022

出　　处：《中国光学（中英文）》2024年第5期1162-1174,共13页Chinese Optics

基　　金：国家自然科学基金(No.62127813,No.62375027);吉林省教育厅项目(No.JJKH20220738KJ);吉林省科技厅项目(No.20230203029SF,No.20210201093GX);光电测量与智能感知中关村开放实验室与北京控制工程研究所空间光电测量与感知实验室开放基金资助(No.LabSOMP-2022-11,No.LabSOMP-2022-12);重庆市自然科学基金(No.CSTB2023NSCO-MSX0504)。

摘　　要：为了研究典型目标材料表面的可见光偏振反射特性,本文针对传统“V”型表面结构缺陷,引入改进Blinn型阴影遮蔽函数,综合考虑镜面反射、漫反射和体散射的影响,建立了典型目标材料表面偏振六参量双向反射分布函数模型。对不同材料(聚丙烯塑料板、99氧化铝陶瓷板、铁板、绿漆铝板)目标样板进行可见光600 nm波段的偏振特性测试实验,并采用遗传算法进行参数反演。实验与仿真结果表明:与传统“V”型遮蔽模型相比,在入射角为50°,相对方位角为180°,0°~60°观测角对目标材料表面偏振特性的影响中,聚丙烯塑料板模型精度提升最大,RMSE百分比提升了70.61%;在入射角为50°,观测角为50°,DoLP随90°~270°相对方位角变化的过程中,与另两种参考模型相比,本模型精度至少提升了24.73%,线偏振度最小均方根误差值仅为1.29%。对于本文使用材料而言,偏振特性取决于其复折射率的值,当入射角确定,观测角为0°~60°,相对方位角在0°~360°内时,n/k的比值越大,线偏振度峰值越大。在可见光波段,波长对线偏振度的影响不大。Focusing on the visible polarization reflection characteristics of typical target materials surfaces,the polarization bidirectional reflection distribution function model based on the improved Blinn masking function was established considering the effects of specular reflection,diffuse reflection and volume scattering,which maked up for the defect of traditional"V"masking function.The physical parameters of the target materials were inverted by genetic algorithm,and the visible light polarization characteristics of four target materials,namely polypropylene,99 alumina ceramic,iron and green painted aluminum,were simulated.Experimental tests validate the model’s accuracy.Results indicate that at an incidence angle of 50°,relative azimuth angles of 90°-270°,and detection angles of 0°-60°,the improved model reduces the root mean square error(RMSE)by 70.61% to 24.73%,with a minimum RMSE of 0.0129.Significant polarization is observed at relative azimuth angles of 120°-240°.The larger the ratio of the real part to the imaginary part of the complex refractive index of the four materials,the greater the peak value of the degree of polarization.In the visible light band,the wavelength has little effect on the degree of polarization.These findings provide theoretical data supporting the understanding of polarization characteristics in typical target materials.

关 键 词：偏振特性 材料表面 可见光波段 遮蔽函数 偏振双向反射分布函数 

分 类 号：O436.3[机械工程—光学工程]