基于斯托克斯矢量对海面溢油的识别  

Identification of oil spill based on Stokes vector

作　　者：宋哲[1] 马思远 刘春楠 徐哲 SONG Zhe;MA Siyuan;LIU Chunnan;XU Zhe(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2024年第1期34-42,共9页Journal of Liaoning Normal University:Natural Science Edition

基　　金：大连市科技创新基金资助项目(2023JJ12GX016)。

摘　　要：利用JANSWAP海谱建立了海面与油膜的模型,采用基尔霍夫近似理论分析了海面和油膜对光波的散射,数值计算了S偏振光、P偏振光、45°偏振光、圆偏振光入射到海面和油膜时半球空间的散射光斯托克斯矢量,分析了入射角和风速对散射斯托克斯矢量中V分量的影响.发现P偏振光和45°偏振光以油膜布儒斯特角(56°)入射时,海面和油膜散射光的V分量存在较大差异,且风速越大越明显.对于海面,V分量都近似为0,对于油膜,P偏振光的散射光V分量在入射面两侧呈两瓣反对称分布,45°偏振光的散射光V分量在入射面内反射光方向两侧呈两瓣反对称分布,说明可以用V分量来区分海水和油膜.该结果能够为海面溢油探测提供一定的理论参考.In this paper,the models of sea surface and oil slick are established by using JANSWAP spectrum.The scattering of sea surface and oil slick is analyzed using Kirchhoff approximation theory.The Stokes vectors of scattered lights in hemispheric space are numerically calculated when S-polarized light,P-polarized light,45°-polarized light and circular polarized light are incident on the sea surface and oil slick respectively.The effect of incidence angle and wind speed on the V component of the scattered Stokes vector is analyzed.It is found that the V component of the scattered light from the sea surface and oil slick is significantly different,when P-polarized light and 45°-polarized light are incident at the Brewster's angle(56°)of oil slick,and the higher the wind speed,the more obvious it is.For the sea surface,the V component is approximately 0.For the oil slick,the scattered V component of P-polarized light forms a two-petal antisymmetric distribution on both sides of the incident plane,and the scattered V component of 45°-polarized light forms a two-petal antisymmetric distribution on both sides of the reflected light direction in the incident plane.It indicates the V component difference can be used to identify seawater and oil slick.The results can provide a theoretical reference for oil spill detection.

关 键 词：偏振光学 海洋溢油 海面 斯托克斯矢量 

分 类 号：O436[机械工程—光学工程]