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Optical Engineering

Comprehensive analysis of the diffuse-to-near-normal-viewing reflectance factor of paint films
Author(s): Augusto Garcia-Valenzuela; Fabio S. A. Cuppo; Jose A. Olivares; Julian M. Galvan-Miyoshi
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Paper Abstract

We present a comprehensive derivation of the so-called diffuse to near-normal-viewing reflectance factor of an architectural paint coating and its measurement with an integrating sphere. We focus our attention to the surface correction terms and consider the case when the surface is rough. We point out limits of the standard formula with the so-called Saunderson corrections commonly used for paint coatings. We provide and discuss a corrected definition of the roughness-dependent "gloss factor" needed to describe specular-component excluded measurements. We show that as the roughness of the surface increases, the specular-excluded reflectance-factor increases, approaching its value with the specular-component included.

Paper Details

Date Published: 1 May 2011
PDF: 11 pages
Opt. Eng. 50(5) 053602 doi: 10.1117/1.3574069
Published in: Optical Engineering Volume 50, Issue 5
Show Author Affiliations
Augusto Garcia-Valenzuela, Univ. Nacional Autónoma de México (Mexico)
Fabio S. A. Cuppo, Ctr. de Investigación en Polímeros (Mexico)
Jose A. Olivares, Ctr. de Investigación en Polímeros (Mexico)
Julian M. Galvan-Miyoshi, Ctr. de Investigación en Polímeros (Mexico)


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