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Multispectral BRDF measurements on anisotropic samples: application to metallic surfaces and OLED displays
Pierre Boher
Thierry Leroux
Thibault Bignon
Véronique Collomb-Patton
  DOI :  10.2352/ISSN.2470-1173.2016.9.MMRMA-359  Published Online :  February 2016
Abstract

We use a Fourier optics multispectral instrument to measure the BRDF of isotropic and anisotropic samples. The capacity to measure rapidly high angular BRDF patterns is useful to study complex BRDF behaviors in particular for anisotropic surfaces. Metallic two dimensional structured surfaces exhibit different diffusion properties along particular directions. Brushed metallic samples coated with transparent protective layer show complex BRDF patterns modulated by interference fringes due to the coating. The color of the surface is driven by the anisotropic diffusion and the coating thickness. The surface of OLED displays shows also complex scattering patterns due to the periodic pixel structure. We examine how to use spectral BRDF measurements to simulate the aspect of the surfaces and how to take into account the anisotropy in practice. Results are compared in some cases to aspect measurements made with multispectral imaging and punctual illumination source. Optical properties of curved OLED TV under parasitic illuminations are also presented.

Journal Title : Electronic Imaging
Publisher Name : Society for Imaging Science and Technology
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 DOI 10.2352/ISSN.2470-1173.2016.9.MMRMA-359
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Pierre Boher, Thierry Leroux, Thibault Bignon, Véronique Collomb-Patton, "Multispectral BRDF measurements on anisotropic samples: application to metallic surfaces and OLED displays"  in Proc. IS&T Int’l. Symp. on Electronic Imaging: Measuring, Modeling, and Reproducing Material Appearance,  2016,  https://doi.org/10.2352/ISSN.2470-1173.2016.9.MMRMA-359

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Copyright © Society for Imaging Science and Technology 2016
72010604
Electronic Imaging
2470-1173
Society for Imaging Science and Technology
10.2352/ISSN.2470-1173.2016.9.MMRMA-359
2470-1173(20160215)2016:9L.1;1-
s7.phd
/ist/ei/2016/00002016/00000009/art00007
Multispectral BRDF measurements on anisotropic samples: application to metallic surfaces and OLED displays
BoherPierre
LerouxThierry
BignonThibault
Collomb-PattonVéronique
15022016
2016
9
1
7
2016
We use a Fourier optics multispectral instrument to measure the BRDF of isotropic and anisotropic samples. The capacity to measure rapidly high angular BRDF patterns is useful to study complex BRDF behaviors in particular for anisotropic surfaces. Metallic two dimensional structured surfaces exhibit different diffusion properties along particular directions. Brushed metallic samples coated with transparent protective layer show complex BRDF patterns modulated by interference fringes due to the coating. The color of the surface is driven by the anisotropic diffusion and the coating thickness. The surface of OLED displays shows also complex scattering patterns due to the periodic pixel structure. We examine how to use spectral BRDF measurements to simulate the aspect of the surfaces and how to take into account the anisotropy in practice. Results are compared in some cases to aspect measurements made with multispectral imaging and punctual illumination source. Optical properties of curved OLED TV under parasitic illuminations are also presented.