Visibility of sparkle in metallic paints
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/46388
Título: | Visibility of sparkle in metallic paints |
---|---|
Autor/es: | Kirchner, Eric | Van der Lans, Ivo | Perales, Esther | Martínez-Verdú, Francisco M. | Campos Acosta, Joaquín | Ferrero Turrión, Alejandro |
Grupo/s de investigación o GITE: | Visión y Color |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía |
Palabras clave: | Color, measurement | Vision - acuity | Color vision | Vision - contrast sensitivity | Spectral discrimination | Astronomical optics |
Área/s de conocimiento: | Óptica |
Fecha de publicación: | 27-abr-2015 |
Editor: | Optical Society of America |
Cita bibliográfica: | Journal of the Optical Society of America A. 2015, 32(5): 921-927. doi:10.1364/JOSAA.32.000921 |
Resumen: | For suitable illumination and observation conditions, sparkles may be observed in metallic coatings. The visibility of these sparkles depends critically on their intensity, and on the paint medium surrounding the metallic flakes. Based on previous perception studies from other disciplines, we derive equations for the threshold for sparkles to be visible. The resulting equations show how the visibility of sparkles varies with the luminosity and distance of the light source, the diameter of the metallic flakes, and the reflection properties of the paint medium. The predictions are confirmed by common observations on metallic sparkle. For example, under appropriate conditions even metallic flakes as small as 1 μm diameter may be visible as sparkle, whereas under intense spot light the finer grades of metallic coatings do not show sparkle. We show that in direct sunlight, dark coarse metallic coatings show sparkles that are brighter than the brightest stars and planets in the night sky. Finally, we give equations to predict the number of visually distinguishable flake intensities, depending on local conditions. These equations are confirmed by previous results. Several practical examples for applying the equations derived in this article are provided. |
Patrocinador/es: | European Metrology Research Programme (EMRP) Spanish Ministry of Economy and Competitiveness(DPI2011-30090-C02) Comunidad de Madrid (CM: S2013/MIT-2790). The EMRP is jointly funded by the EMRP participating countries within the European Association of National Meteorlogy (EURAMET) and the European Union. |
URI: | http://hdl.handle.net/10045/46388 |
ISSN: | 1084-7529 |
DOI: | 10.1364/JOSAA.32.000921 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | This paper was published in Journal of the Optical Society of America A, and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josaa/abstract.cfm?uri=josaa-32-5-921. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1364/JOSAA.32.000921 |
Aparece en las colecciones: | INV - GVC - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Visibility_of_sparkle_in_metallic_paints.pdf | 2,32 MB | Adobe PDF | Abrir Vista previa | |
Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.