光学元件亚表面缺陷偏振双向反射分布函数
Polarized bidirectional reflectance distribution function by subsurface defects of optical component
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摘要: 利用琼斯散射矩阵,借助右手正交基组来表示入射场和散射场，推导出光学元件亚表面缺陷或微粒在不同偏振状态下的双向反射分布函数的表达式。给出了亚表面缺陷在不同入射角条件下，不同偏振状态下的双向反射分布函数与散射方位角之间的关系，以及不同入射角下p偏振入射产生的p偏振双向反射分布函数的3维散射图。结果表明:p偏振入射产生的p偏振双向反射分布函数强烈依赖于入射角、散射角和方位角，且随着入射角的增加，其最小值点所对应的方位角逐渐减小。
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关键词:
- 亚表面缺陷 /
- 光散射 /
- 偏振双向反射分布函数
Abstract: Polarized bidirectional reflectance distribution function(PBRDF) of light scattered by subsurface defect(SSD) was derived on the foundation of Jones scattering matrix by use of right handed basis set. Four kinds of PBRDF changing with azimuth angle were calculated and compared at different incident angles, and three-dimensional BRDFpp which indicates p polarized scattered light due to p polarized incident light were obtained at different incident angles. The results show that BRDFpp by SSD depends strongly on incident angle, scattering angle and azimuth angle. The azimuth angle of minimal BRDFpp decreases with the increase of incident angle. -
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