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Color characterization of coatings with diffraction pigments

AuthorsFerrero, Alejandro CSIC ORCID; Bernad, Berta CSIC; Campos Acosta, Joaquín CSIC ORCID CVN ; Perales, E.; Velázquez, J.L. CSIC ORCID CVN; Martínez-Verdú, F.M.
Issue Date14-Sep-2016
PublisherOptical Society of America
CitationJournal of the Optical Society of America A: Optics and Image Science, and Vision 33(10): 1978-1988 (2016)
AbstractCoatings with diffraction pigments present high iridescence, which needs to be characterized in order to describe their appearance. The spectral bidirectional reflectance distribution functions (BRDFs) of six coatings with SpectraFlair diffraction pigments were measured using the robot-arm-based goniospectrophotometer GEFE, designed and developed at CSIC. Principal component analysis has been applied to study the coatings of BRDF data. From data evaluation and based on theoretical considerations, we propose a relevant geometric factor to study the spectral reflectance and color gamut variation of coatings with diffraction pigments. At fixed values of this geometric factor, the spectral BRDF component due to diffraction is almost constant. Commercially available portable goniospectrophotometers, extensively used in several industries (automotive and others), should be provided with more aspecular measurement angles to characterize the complex reflectance of goniochromatic coatings based on diffraction pigments, but they would not require either more than one irradiation angle or additional out-of-plane geometries. © 2016 Optical Society of America
Description11 págs.; 18 figs.; 1 tab. OCIS codes: (290.1483) BSDF, BRDF, and BTDF; (050.1940) Diffraction; (030.5630) Radiometry; (120.5820) Scattering measurements.
Publisher version (URL)
Identifiersdoi: 10.1364/JOSAA.33.001978
issn: 1520-8532
Appears in Collections:(CFMAC-IO) Artículos

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