基于Davies理论的粗糙面光散射特性研究

Study on Scattering Characters of the Rough Surface Based on Davies Theory

基于Davies理论,利用BRDF描述散射特性,系统考察了BRDF随角度、波长及粗糙度等参数的变化规律。数值结果表明,粗糙面的BRDF在形态上有一定的类镜面散射特性同时在镜面方向出现"高光"区域;入射天顶角越大则散射越趋于镜面反射;波长越小,粗糙面的相对粗糙程度越大,则Davies理论模型非镜面反射部分比重也越大。结果表明研究可为复杂实体散射分析与应用提供一定的理论依据和指导。

In this paper,regularity of scattering has been investigated using BRDF based on Davies theory changing with angle, wavelength, roughness, etc. The numerical simulation showed that the shape of rough surface scattering has a certain scattering of mirror-like and has a highlight area in the specular reflection direction. The scattering shape will be more like specular reflection with the zenith angle of incident increase. The off-specular component will be more important with the wavelength decrease,relative roughness increase,in Davies model. This article research results can provide necessary theory and guidance for complex entity scattering.