具有不同涂层的样品表面双向反射分布函数的三维测量

3-D Measurements of Bidirectional Reflectance Distribution Functions of Target Surfaces with Different Coats

利用半球空间双向反射分布函数测量装置,采用样本比值法,实验测量了不同材质及涂层表面对激光束在整个半球空间内的双向反射分布函数.分析了漫反射板与无涂层铝板(裸板)表面,以及不同涂层和不同入射角下同一涂层对入射光的反射光强的空间分布,得出了所测几种样品在特定波长激光照射下的表面反射与散射特性.

Bidirectional reflectance distribution function （BRDF） can be effectively used to describe the reflection characteristics of the space and spectrum of a target surfaces. A setup is designed to measure the BRDFs in the laboratory and the BRDFs of several target samples with different surface coats under laser illumination are experimentally measured in this paper. The reflectance distributions of diffusing plate surface,aluminum plate surface without any coat （bared plate） and with different coats under different incident angles of laser beam are analyzed in detail. From this some significative results on the reflection and scattering characteristics of the measured sample surfaces under given laser wavelength are obtained.