Title: Full 3D BSDF spectroradiometer
Authors: Leloup, Frédéric
De Waele, Tom
Versluys, Jorg
Hanselaer, Peter
Pointer, Michael
Issue Date: Dec-2006
Publisher: CIE (Commission International d'Eclairage)
Host Document: Proceedings of the ISCC/CIE Expert Symposium '06: 75 Years of the CIE Standard Colorimetric Observer
Conference: 75 Years of the CIE Standard Colorimetric Observer location:Ottawa, Canada date:16-17 May 2006
Abstract: To expedite colour and gloss measurements, the CIE and ASTM have recommended some basic geometries regarding illumination and viewing angles. There are, however, many surfaces that cannot be adequately measured using such limited conditions. Any gloss and colour measurement can be related to some particular value of the general spectral Bidirectional Scatter Distribution Function (BSDF). In our laboratory, we have built a goniospectroradiometer which allows us to determine the absolute BSDF of an object. Spectral properties can be measured at any spherical angle of illumination and at almost any spherical viewing angle using a detector circulating around the sample with two degrees of freedom. Absolute spectral BSDF values can be calculated from dark current corrected CCD readings (counts) according to ASTM E1392. Spectral and spatial characteristics of the instrument are determined and some measurement results on different kind of samples are reported.
ISBN: 9783901906510
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Informatics Section
ESAT - ELECTA, Electrical Energy Computer Architectures
Technologiecluster ESAT Elektrotechnische Engineering
Electrical Engineering (ESAT) TC, Technology Campuses Ghent and Aalst

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