不同形状椭球粒子对Mueller矩阵偏振的影响研究  

Effect of Ellipsoid Particles with Different Shapes on Polarization of Mueller Matrix

作　　者：张肃[1] 陆社添 李英超[1] 战俊彤[1] 付强[1] 张月[2] 张学敏 Zhang Su;Lu Shetian;Li Yingchao;Zhan Juntong;Fu Qiang;Zhang Yue;Zhang Xuemin(Institute of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Beijing Institute of Space Electromechanics,Beijing 100089,China)

机构地区：[1]长春理工大学空间光电技术研究所,吉林长春130022 [2]北京空间机电研究所,北京100089

出　　处：《激光与光电子学进展》2024年第17期348-356,共9页Laser & Optoelectronics Progress

摘　　要：针对偏振光通过烟尘环境时椭球灰尘粒子的Mueller矩阵偏振特性变化问题,利用T矩阵与蒙特卡罗模拟结合的方法实现多粒子散射仿真,结合Mueller矩阵极化分解方法分析椭球形粒子形貌参数变化对椭球粒子的Mueller矩阵、二向色性,以及其所导致的相位延迟性、退偏等参数的影响。仿真结果表明:对于椭球粒子的单次散射,横纵轴比相乘等于1的一对椭球粒子的退偏值、偏振度几乎相等;对于多次散射,可以通过Mueller矩阵元M_(24)、M_(34)、M_(42)和M_(43)区别球体和椭球体,通过Mueller矩阵元M_(12)、M_(13)、M_(21)、M_(31)区分椭球粒子的取向方向;椭球粒子的二向色性随着横纵轴比值的增加而衰减,且弱于球形粒子,相位延迟值随着横纵轴比值的增加没有明显变化,但强于球形粒子。本研究可为椭球粒子Mueller矩阵的研究奠定理论基础,为大气颗粒物检测提供新的方法。To address changes in the Mueller-matrix polarization characteristics of polarized light passing through hazy environments containing ellipsoidal particles,this study employs a combined method involving a T-matrix and Monte Carlo simulation to perform multiparticle scattering simulations.Using the Mueller-matrix polarization decomposition method,the effects of different shapes of ellipsoid particles as well as the differences among spherical particles on the Mueller-matrix patterns,dichroism,resulting retardance,and depolarization are analyzed.The results show that for the single scattering of ellipsoid particles,when the horizontal-to-vertical ratio of the ellipsoid particle is reciprocal,the depolarization values and polarization degrees of a pair of ellipsoidal particles are similar.For multiple scattering,a sphere and an ellipsoid can be distinguished by Mueller-matrix elements M_(24),M_(34),M_(42),and M_(43),whereas the orientation of ellipsoid particles can be distinguished by Mueller-matrix elements M_(12),M_(13),M_(21),and M_(31).The dichroism of the ellipsoid particles becomes weaker than that of the spherical particles as the horizontal-to-vertical ratio increases.The phase-delay value of the ellipsoid particles does not significantly affect the shape variation of the ellipsoid particles,although its effect is stronger than that of the spherical particles.This study provides a theoretical foundation for future investigations pertaining to the Mueller matrix of ellipsoidal particles and provides a new method for atmospheric particulate-matter detection.

关 键 词：大气光学 椭球粒子 MUELLER矩阵 T矩阵方法 偏振 蒙特卡罗法 极化分解 

分 类 号：O436.3[机械工程—光学工程]