3-D measurements of bidirectional reflectance distribution functions of target

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.