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Paper No S11.5: Colorimetric Evaluation of Directional Variations
Author(s) -
Neumeier Jürgen,
Becker Michael E.
Publication year - 2015
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.10527
Subject(s) - chromaticity , gloss (optics) , optics , luminance , colorimeter , standard illuminant , light scattering , bidirectional reflectance distribution function , chromatic scale , scattering , planar , materials science , reflectivity , physics , computer science , computer graphics (images) , composite material , coating
We introduce an approach for measurement of the directional distribution of light scattered during reflection and transmission (i.e. scattering distribution function, SDF) which is based on evaluation of photometric and colorimetric images rather than on mechanical scanning or conventional conoscopic imaging. Planar and cylindrical samples are illuminated by either point light sources or by linear lamps and the lateral distributions of luminance and chromaticity resulting from scattering are recorded by an advanced imaging colorimeter. The SDFs can be used for evaluation of a range of appearance characteristics (e.g. gloss, sheen, luster, clarity, haze, etc.), their chromaticity components can be applied for characterization of media that change color with direction of illumination and observation.