深粗糙度随机粗糙表面光散射特性数值研究

为了研究深粗糙度随机粗糙表面的光散射现象，采用线性滤波法生成高斯分布随机粗糙表面，利用矩量法推导了深粗糙度表面的散射光平均差分散射系数。通过数值计算波长为1.064 μm的S和P线偏振入射光照射下的多组良导体表面的平均差分散射系数，发现结果出现了后向增强峰值和朗伯散射现象。根据散射宽度分布、后向增强峰值、散射峰位置等特征，分析了入射角、表面粗糙度与散射分布之间的关系。结果表明，S和P线偏振入射光良导体表面散射场能量守恒特性不同。

Numerical Study on Light Scattering from Deep Randomly Rough Surfaces

To study the light scattering phenomenon of deep randomly rough surfaces,the linear filtering method is used to generate Gaussian random rough surface,and MOM is used to derive the average differential scattering coefficient of scattered light from deep roughness random rough surface.The average differential scattering coefficients of a group of good conductors irradiated by linearly polarized incident light of S and P with a wavelength of 1.064um are numerically calculated.Backward enhancement peak and Lambert scattering appear in the results.According to the scattering width distribution,backward enhancement peak and the position of the scattering peak,the relationship between incident angle and surface roughness and scattering distribution is analyzed.The energy conservation characteristics of the surface scattering field are different between S and P linearly polarized incident conductors.