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Bo Peng

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Proceedings Article | 5 November 2020 Paper

Modeling and measurement analysis of two diffusers' BRDF illuminated with narrow laser beam

Kun Zhong, Wei Su, Bo Peng, Shaling Huang, Zhongyun Li

Proceedings Volume 11567, 1156709 (2020) https://doi.org/10.1117/12.2573930

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The BaSO₄ diffuser and the PTFE diffuser are general reference diffuser in BRDF measurement. However, there are some differences of reflectance charactors between these two diffuser with illumination of narrow laser beam, and it affects the BRDF measurement precision. So the study of the differences of BRDF between the diffusers is necessary. Analysis the BRDF component of the diffusers was made with proposal of a 7-parameter model which including the volume scattering. Fittings of parameter models to the BaSO₄ diffuser and PTFE diffuser was made based on Simulated Annealing Algorithm respectively. The results showed that the 7-parameter model decreased the variance and improved the PTFE diffuser’s BRDF fitting results compared with 5-parameter model.

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