面向水面溢油检测的多角度偏振反射特性仿真研究  

Simulation Investigation of Multi-angle Polarization Reflection Characteristics for Floating Oil Spills Detection

作　　者：栾晓宁[1] 廖玉昆 禚堃 闫道夏 牟冰[1] 秦平[2] 李千 康颖[1] Luan Xiao-ning;Liao Yu-kun;Zhuo Kun;Yan Dao-xia;Mu Bing;Qin Ping;Li Qian;Kang Ying(College of Physics and Opto-electronic Engineering,Ocean University of China,Qingdao,266100,China;College of Electronic Engineering,Ocean University of China,Qingdao,266100,China)

机构地区：[1]中国海洋大学物理与光电工程学院,青岛266100 [2]中国海洋大学电子工程学院,青岛266100

出　　处：《光学学报》2023年第6期231-239,共9页Acta Optica Sinica

基　　金：国家自然科学基金(61890964,41906163,42076183)。

摘　　要：为了在耀光干扰下提升粗糙海面溢油的检测效果,基于Cox-Munk粗糙海面概率统计模型,对不同入射和观测几何下海水与油膜反射耀光的偏振度及其差异进行仿真研究。结果表明:入射和观测几何以及海面介质的折射率是海面耀光偏振度空间分布的主要影响因素;当满足一定太阳入射角时,海面介质折射率差异是水/油反射耀光偏振度差出现“正负反转”的主要原因;入射平面内水面溢油最佳偏振观测角度与太阳入射天顶角和溢油折射率相关。Objective As s toxic hydrocarbon pollutant,oil spills can form oil slick floating on the water surface,hindering the material exchange between water and air,which poses a serious threat to the marine ecological environment as well as production and life of human beings.Investigation on how to realize early warning and continuous monitoring of pollutants in the early stage of oil spill accidents is of great significance to the protection of marine environment security.Marine optical remote sensor is a powerful means to realize continuous dynamic monitoring of large-area of marine environment at different scales and levels.But the solar flare which is the main reason for the saturation and distortion of optical remote sensors cause inherent difficulties for the improving of information extraction of remote sensing.Some previous work indicate that solar flares posses significant polarization characteristics and under specific conditions,polarization detection is an effective method for oil spills detection.But under the influence of speed and direction of wind,the real sea surface cannot be regarded as a smooth surface,and the characteristics and state of oils spills are complex.In the 1950s,Charles Cox and Walter Munk put forward the famous Cox-Munk probabilistic statistical model of rough sea surface after a long-term rigorous investigation,which conforms very well to the real state of the sea surface.In this paper,the Cox-Munk probability statistical model is employed to model the solar flare reflected by rough sea surface affected by speed and direction of wind.With the polarization reflection parameter defined by Fresnel’s law,the spatial distribution and related differences between the DOLP of solar glares reflected from clean sea surface and floating oil slick with different refractive indexes under different incident and observation geometries,as well as different speed and direction of sea surface wind,are quantitatively simulated to investigate.We hope the simulation results can be helpful for applicatio

关 键 词：测量 线偏振度 太阳耀光 水面溢油 多角度 

分 类 号：U698.7[交通运输工程—港口、海岸及近海工程]