Design and experimental research of angle self-compensation setup for BSDF measurement  

作　　者：齐超 刘洪臣 韦袁丽 戴景民 

机构地区：[1]School of Electrical Engineering and Automation,Harbin Institute of Technology

出　　处：《Chinese Optics Letters》2009年第5期403-406,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50336010);the Post Doctor Foundation of China (No.20060390783)

摘　　要：When using a single reference to measure the bi-directional scattering distribution function （BSDF）, the incident zenith angle of the tested sample must be identical to that of the reference. In order to get the hemisphere space scattering characteristic on the sample surface, usually a motor drives the sample tilting, then the incident zenith angle is changed and needs to be the compensated by another motor. We mathematically deduce the expression of compensation angle when the incident zenith angle is changed by the rotation of motor. After the incident angle is compensated, the scattering zenith angle and azimuth angle are deduced too. The uncertainty of the system is 0.75%. Scattering measurements are performed on copper sample with visible light under different temperatures.When using a single reference to measure the bi-directional scattering distribution function （BSDF）, the incident zenith angle of the tested sample must be identical to that of the reference. In order to get the hemisphere space scattering characteristic on the sample surface, usually a motor drives the sample tilting, then the incident zenith angle is changed and needs to be the compensated by another motor. We mathematically deduce the expression of compensation angle when the incident zenith angle is changed by the rotation of motor. After the incident angle is compensated, the scattering zenith angle and azimuth angle are deduced too. The uncertainty of the system is 0.75%. Scattering measurements are performed on copper sample with visible light under different temperatures.

关 键 词：Distribution functions Electric drives Motors 

分 类 号：TM761.1[电气工程—电力系统及自动化]