中国光学（中英文）2025，Vol.18Issue(2)：343-358,16.DOI:10.37188/CO.2024-0158
基于二向偏振分布函数修正的机场地物材质可见光偏振特性研究
Visible polarization characteristics of airport ground material based on BPDF correction
摘要
Abstract
This paper provides a theoretical model for studying typical airport ground materials'polarization characteristics which is required for the development of polarization imaging instruments.First,serious shad-ow masking effects were analyzed based on the P-G model.These effects occur when light is incident at a large angle.Then,the shadow masking function was optimized using the spherical trigonometry formula.This optimization equates the specular reflection point to a three-dimensional sphere.Due to the unique dis-persion characteristics of different targets,a new bidirectional polarization distribution function(BPDF)mod-el was introduced to replace the traditional BRDF parameter affected by wavelength and body scattering.The new BPDF model integrates diffuse reflection and body scattering.In the experimental stage,the accuracy of the line polarization degree was calibrated.The line polarization degree of typical airport ground material was fitted with model parameters.This fitting was based on the dynamic TS algorithm through multi-angle BRDF experiments.The fitting model's six parameters were used to obtain the root mean square roughness parameter.This process verified the validity of the modified BPDF model.In the simulation stage,the root mean square error(RMSE)was used as the accuracy index.The modified BPDF model,control model,and experimental results were compared to analyze the effects of detection,azimuth,and incidence angles on po-larization characteristics.The accuracies of the four experimental targets improved by 4.39%,4.00%,4.17%,and 5.26%compared with the control model.The RMSE was less than 0.05 for large detection angles.This allows the modified model to study polarization characteristics of rough materials like airport ground targets.Finally,the effect of fitting parameters on polarization characteristics was simulated.Results show that line polarization is positively related to the refractive index and inversely related to the surface roughness.The ac-curacy of the modified BPDF model is thus proved.This provides ideas for studying polarization character-istics of airport ground targets.关键词
偏振特性/镜面反射/色散/遮蔽效应/二向偏振分布函数(BPDF)Key words
polarization characteristics/specular reflection/dispersion/masking effect/bidirectional polariz-ation distribution function(BPDF)分类
数理科学引用本文复制引用
邹宏扬,战俊彤,李文君,张肃,付强,段锦,李英超,刘宏宇..基于二向偏振分布函数修正的机场地物材质可见光偏振特性研究[J].中国光学（中英文）,2025,18(2):343-358,16.基金项目
吉林省科技发展计划(No.20240101342JC) （No.20240101342JC）
吉林省科技厅项目(No.0230203029SF) （No.0230203029SF）
国家自然科学基金项目(No.62127813) （No.62127813）
北京空间机电研究所院士工作站基金(No.23-11-131-W) Supported by Science and Technology Development Program of Jilin Province(No.20240101342JC) （No.23-11-131-W）
Project of Jilin Provincial Science and Technology Department(No.0230203029SF) （No.0230203029SF）
National Natural Science Found-ation of China(NSFC)(No.62127813) （NSFC）
Fund for Academician Workstation of Beijing Institute of Space Elec-tromechanics(No.23-11-131-W) （No.23-11-131-W）
