Chinese Optics Letters, 2009, 7 (1): 0188, Published Online: Mar. 4, 2009
Measurement of bidirectional reflection distribution function on material surface Download: 687次
双向反射分布函数 绝对测量 相对测量 测量原理 测量方案 测量精度 300.6550 Spectroscopy, visible 290.5820 Scattering measurements 120.5700 Reflection 160.4760 Optical properties
Abstract
Two automatic measurement methods of bidirectional reflection distribution function (BRDF) are presented based on absolute and relative definition. Measurement principle and scheme of the methods are analyzed. A real-time measurement device is developed, the measurement spectral range of which is from ultraviolet to near infrared with 2.4-nm wavelength resolution, and the angular range is [EQUATION] in azimuth angle and [EQUATION] in zenith angle with [EQUATION] angle resolution. Absolute measurements of BRDF on tinfoil and ceramic tile are performed and the test materials present apparent specular reflection characteristics. The theoretical error in the experiment is about 6.05%. The BRDF measurement results are closely related to the precision of measurement platform, the sensitivity of measurement instrument, and the stability of illuminating light source.
Wei Zhang, Hongyuan Wang, Zhile Wang. Measurement of bidirectional reflection distribution function on material surface[J]. Chinese Optics Letters, 2009, 7(1): 0188.