光学学报, 2018, 38 (3): 0329002, 网络出版: 2018-03-20
基于偏振双向反射分布函数的粗糙表面偏振特性 下载: 591次
Polarization Properties of Rough Surfaces Based on Polarized Bi-Directional Reflectance Distribution Function
散射 偏振双向反射分布函数 粗糙表面 穆勒矩阵 偏振特性 scattering polarized bi-directional reflectance distribution rough surfaces Mueller matrix polarization properties
摘要
为了研究高斯粗糙表面偏振特性, 基于微面元理论, 综合考虑微面元的漫反射和镜面反射, 建立偏振双向反射分布函数模型。对由偏振双向反射分布函数得到的穆勒矩阵进行分解、变换等处理, 推导出表征粗糙表面二向色性、相位延迟和退偏的3个子矩阵及其对应的偏振特性表达式。针对典型的粗糙目标, 对偏振特性进行理论计算。分析入射角、方位角, 以及粗糙度对粗糙表面偏振特性的影响。结果表明:粗糙表面二向色性在入射角变化范围内有极大值, 且随方位角的增大而增大;相位延迟随入射角的增大而减小, 且在方位角变化范围内有极大值;退偏能力在入射角范围内有极小值, 且随方位角的增大而减小;粗糙度对除退偏能力以外的偏振特性影响较小。
Abstract
To study the polarization properties of rough surfaces, we build a polarized bidirectional reflectance distribution function model based on the micro-facet theory by considering both the diffuse reflection and mirror reflection of micro-facet. By decomposing and changing the form of Mueller matrix, based on polarized bi-directional reflectance distribution function, we get three sub-matrixes and corresponding expressions which characterize the dichroism, phase delay, and depolarization of rough surfaces. We calculate the polarization properties of typical rough surfaces, and analyze the impact of incidence angle, azimuth angle, and roughness on polarization properties of rough surfaces. The results show that, the dichroism of rough surfaces has the maximum in the range of incident angle, and increases with increase of azimuth angle. The phase delay has the maximum in the range of azimuth angle, and decreases with increase of incident angle. The depolarization has the minimum in the range of incident angle, and decreases with increase of azimuth angle. The roughness has little impact on these factors except for depolarization.
章延隽, 王霞, 贺思. 基于偏振双向反射分布函数的粗糙表面偏振特性[J]. 光学学报, 2018, 38(3): 0329002. Zhang Yanjun, Wang Xia, He Si. Polarization Properties of Rough Surfaces Based on Polarized Bi-Directional Reflectance Distribution Function[J]. Acta Optica Sinica, 2018, 38(3): 0329002.