基于微扰近似的圆锥表面光散射*

由Hueygen原理出发,介绍了粗糙表面的光散射特性.基于微扰近似,在不考虑遮蔽效应和圆锥顶点的散射情况下,分析了圆锥物体的光散射特性,推导了圆锥物体对平面光的散射场解析表达式.计算了圆锥表面在高度起伏均方根不同情况下对1.06μm光波的散射,并且得到了入射角一定的情况下,不同观察方向的散射光强分布曲线.结果表明,在观察方位角不变时,圆锥的散射光强随观察角顶角的增加先增大后减小|在观测方位角一定时,散射光强随高度起伏均方根的增加而减小,且随观察方位角呈对称分布.

Light Scattering of Cone-shaped Space Objects by Using Small Perturbation Approximate

According to Hueygen principle,the light scattering of the rough surface was discussed.Then,no considered the shadowing and the scattering of vertex,based on the Small perturbation approximate,the equation of computation the scattering of the rough cone was deduced.The scattering intensity at 1.06 μm was calculated,when the incident angle was given and the observed angle was variation.The results show that in observation of the same azimuth,the scattering intensity of cone surface with the observed angle of the first increase after the increase of decreases and in certain observation azimuth,the scattering intensity with Root-mean-square surface height decreases and with the observation azimuth was symmetrical distribution.