米散射浑浊水体偏振成像模型仿真研究  

Simulation Study of Polarization Imaging Model for Mie Scattering Turbid Water Bodies

作　　者：路淑芳 张然[1] 陈永台 褚金奎[1] Lu Shufang;Zhang Ran;Chen Yongtai;Chu Jinkui(School of Mechanical Engineering,Dalian University of Technology,Dalian 116086,Liaoning,China)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116086

出　　处：《激光与光电子学进展》2024年第4期206-213,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(52175265);国家自然科学基金创新研究群体科学基金(51621064);中央高校基础研究基金(DUT21GF308)。

摘　　要：为了研究浑浊水体对成像质量的影响,利用单次Mie散射理论和蒙特卡罗法,在融合几何光学成像的基础上提出一种理论分析方法。该方法分析不同波长的点光源在不同粒径不同浓度的浑浊水体环境传输时的成像特征。结果表明:波长分别为456 nm、524 nm、620 nm的点光源经相同的水体环境和无散射环境进行偏振成像传输时,波长为456 nm的点光源的成像效果最好;波长为456 nm的点光源经过散射粒径大小分别为1μm和2μm的浑浊水体时,线偏振光的成像效果优于圆偏振光,圆偏振光优于自然光;当穿过散射粒径为3μm、4μm、5μm的浑浊水体时,自然光成像效果最好,线偏振光成像效果最差。从理论上分析了不同波段的点光源经过不同水体进行偏振成像传输的成像效果,为水下偏振成像技术提供了新的思路和方法。Based on fused geometric optical imaging,this thesis proposes a theoretical analysis method considering single Mie scattering theory and the Monte Carlo method to study the influence of turbid water on imaging quality.The proposed method analyzes the imaging characteristics of a point light source with different wavelengths(456 nm,524 nm,and 620 nm)is transmitted through a turbid water environment with different particle sizes and concentrations.The results show that the point light source with wavelength of 456 nm exhibits the best imaging effect when subjected to polarization imaging transmission in the same water environment and nonscattering environment.In addition,when the 456-nm light passes through turbid water with scattering particle sizes of 1μm and 2μm,the imaging effect of linear polarized light is better than that of circular polarized light,which is better than natural light.However,while passing through turbid water with particle sizes of 3μm,4μm,and 5μm,the natural light and linearly polarized light exhibit the best and the worst imaging effects,respectively.Overall,this paper provides new ideas and methods for underwater polarization imaging technology.

关 键 词：偏振传输 可见光波段 蒙特卡罗法 水下成像 偏振保持性 

分 类 号：O435[机械工程—光学工程]