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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 1 — Jan. 4, 2012

Scattering characterization of nanopigments in metallic coatings using hyperspectral optical imaging

José M. Medina and José A. Díaz  »View Author Affiliations


Applied Optics, Vol. 50, Issue 31, pp. G47-G55 (2011)
http://dx.doi.org/10.1364/AO.50.000G47


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Abstract

We have determined the reflectance spectra of colored metallic coatings with high spatial resolution by using a hyperspectral imaging system. Reflectance spectra were converted to color coordinates revealing characteristic color maps in the color space. Principal-component analysis was applied to decorrelate the spatial variability of the reflectance spectra. We found that the eigenvalue spectra follow different power laws. The scaling exponent was analyzed by considering random-walk-type processes. An estimation of the Hurst exponent was done, suggesting anomalous diffusion from multiple light scattering. The results show that hyperspectral imaging combined with principal-component analysis provides a valuable method for nondestructive testing of complex turbid media.

© 2011 Optical Society of America

OCIS Codes
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(310.6860) Thin films : Thin films, optical properties
(330.1690) Vision, color, and visual optics : Color
(310.3915) Thin films : Metallic, opaque, and absorbing coatings
(110.4234) Imaging systems : Multispectral and hyperspectral imaging
(310.6188) Thin films : Spectral properties

History
Original Manuscript: July 11, 2011
Manuscript Accepted: August 7, 2011
Published: October 7, 2011

Virtual Issues
Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics

Citation
José M. Medina and José A. Díaz, "Scattering characterization of nanopigments in metallic coatings using hyperspectral optical imaging," Appl. Opt. 50, G47-G55 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-50-31-G47


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