22 October 2010 Measuring of spectral BRDF using fiber optic spectrometer
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We designed a new spectral bidirectional reflection distribution function (BRDF) measurement instrument, which can be utilized to measure isotropic materials simply in laboratory. The measurement instrument consists of a fiber optic spectrometer, a three-dimensional turntable, a halogen light source and a computer. The spectrometer acquires 696 samples in visible band. The angular range controlled by three-dimensional turntable is 0~330° and 0~80° for azimuth angle and zenith angle respectively. The halogen light source supplies a continuous spectrum with high efficiency and stability in the wavelength range from 360~1500 nm. The spectrometer and the three-dimensional turntable connect with the computer. The angle rotation and data acquisition are all controlled by the computer. The spectral BRDF measurement of three materials is conducted. The relation of spectral BRDF, wavelength and reflected zenith angle is presented. In conclusion, the designed spectral BRDF measurement system can acquire spectral BRDF data quickly and accurately, thus it is an efficient way to measure material spectral reflected properties which is need for computer rendering, target identification.
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Wei Zhang, Wei Zhang, Fugang Wang, Fugang Wang, } "Measuring of spectral BRDF using fiber optic spectrometer", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76582P (22 October 2010); doi: 10.1117/12.866129; https://doi.org/10.1117/12.866129

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