海洋油膜偏振反射特性仿真与测试  

Simulation and Test of Polarization Reflection Characteristics of Marine Oil Film

作　　者：杨迪[1] 李英超[2] 韩晓磊 史浩东[2] 刘昕悦 孙洪宇 明星 YANG Di;LI Yingchao;HAN Xiaolei;SHI Haodong;LIU Xinyue;SUN Hongyu;MING Xing(Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China;Space Photoelectric Technology Institute,Changchun University of Science and Technology,Changchun 130032,China;College of Physical Science and Technology,Hebei University,Baoding 071002,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]长春理工大学空间光电技术研究所,长春130032 [3]河北大学物理科学与技术学院,保定071002

出　　处：《光子学报》2024年第4期49-61,共13页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61890965,61890964,62005002)。

摘　　要：为了海洋溢油的检测与识别,在偏振特性建模中综合考虑天空的偏振辐射、油膜表面的动态反射、接收探测器的姿态和性能,进行全数字仿真,开展外场动态水面的实测,进行油膜偏振半实物仿真,最后对海洋溢油进行了偏振测试与分析。试验结果表明:在区分油品方面,汽油和水的强度差值为29.33%,线偏振度差值为0.97%,二者结合可较好的分辨溢油。Oil spills are a common form of marine pollution.In the field of satellite remote sensing,utilizing polarization techniques for oil spill detection holds significant potential.Researchers conducted tests,simulations,and analyses on the polarization characteristics of oil spills.These studies focused on the optical feature model of the oil film,neglecting the geometric feature modeling,resulting in an incomplete exploration of polarization characteristics in marine oil spills.Based on these findings,this paper encompasses polarization sky radiation,dynamic oil film reflection,detector performance parameters,and more,establishing a comprehensive oil spill model.Firstly,a model for polarization distribution in the sky was created,with sunlight as the incident light and scattered light as linearly polarized light.Through the calculation method of Rayleigh particles,the polarization degree and polarization angle of sky light were obtained,further deriving the Stokes vector of polarized sky light.Secondly,a submodule for wind-wave and swell-wave spectrum was constructed,utilizing the Jonswap spectrum model for wind-waves and the Gaussian model for swell-waves.These were combined into the wave submodule.Thirdly,a submodule for polarization radiation conversion of the sea surface was generated.Through the transformation of the‘global-to-local’incident Stokes rotation matrix,the transformation matrix was multiplied by the incident vector,then by the local pBRDF matrix,and finally by the‘local-to-global’transformation matrix.The calculated results were the global reflected luminance.Finally,a submodule for the polarization distribution of the oil film was built,deriving the polarization degree and polarization angle of quasi-monochromatic light from the boundary conditions of electric and magnetic vectors based on the refractive index,incidence angle,and emergence angle.The simulation framework in this paper comprises two parts full digital simulation and semi-physical simulation.Results of full digital simulations

关 键 词：海洋溢油 偏振特性 视景仿真 海浪谱 全局与局部坐标转换 偏振双向反射 

分 类 号：TN219[电子电信—物理电子学]