空间目标表面包覆材料褶皱对光散射特性的影响

空间目标表面包覆材料的不规则褶皱对其光散射特性具有显著影响.对空间目标表面褶皱进行分类并分析不规则褶皱形成的主要原因.以金聚酰亚胺薄膜样片为研究对象，搭建样片辐射亮度测量系统，获取不同褶皱程度样片的辐射亮度数据.将辐射亮度转换为星等进行分析发现，理论计算与实验测量得到的星等曲线趋势存在较大差异，主要表现为：平面材料的单一镜面反射现象消失；样片在多个角度上出现分散的较强散射点；褶皱程度越高，分散的强散射点越多.结果表明，在对空间目标的光散射特性进行数值计算时，必须充分考虑表面包覆材料褶皱的影响，根据褶皱情况修正数值计算模型，这对空间目标的探测和识别具有重要意义.

Influence of Covering Material Wrinkles on Space Object's Optical Scattering Characteristics

The irregular wrinkles of coating materials on space object's surface have a significant influence on its optical scattering characteristics. The wrinkles of space object's surface are classified and the main causes of these wrinkles are analyzed. By taking the gold polyimide film samples as the research object, a radiance measurement system is set up to obtain the radiance data of different wrinkled samples. The experimental radiance is converted into magnitude. There are great differences in the magnitude curves by comparing the theoretical calculations and experimental measurements. The single specular reflection phenomenon disappears and the reflection energy is scattered at multiple angles. Moreover, the higher degree of winkles is, the more strong scattering points are. The results show that the influence of the coating wrinkles must be taken into account when calculating the space object's optical scattering characteristics. The numerical calculation model can be revised according to the wrinkles conditions, which have great significance on the detection and identification of space objects.