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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. 6 — May. 25, 2012

Colors of transparent submicron suspensions on approaching the Rayleigh regime

Davide Magatti, Fabio Ferri, Paolo Ragazzi, Marta C. Pigazzini, Alessandro Averchi, and Paolo Di Trapani  »View Author Affiliations


Applied Optics, Vol. 51, Issue 12, pp. 2183-2191 (2012)
http://dx.doi.org/10.1364/AO.51.002183


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Abstract

The features of scattered and transmitted light by dilute suspensions of transparent submicron particles are investigated both in the spectral and in the perceived colorimetric domains, as a function of effective particle diameter D, particle-host refractive-index mismatch m, and scattering angle θ. Our results show that the wavelength λ-dependence of the scattering and extinction cross sections remains quite similar well beyond the Rayleigh regime up to particle sizes of a few hundreds nm, but only for specific scattering angles that depend on D and m, and tend to 90° on approaching the Rayleigh regime. Close to this limit (D/λ1), a simple criterion that relates the perceived scattering color at θ=90° and the ratio of the sample extinction coefficients at two properly selected wavelengths is demonstrated. A comparison between computed and measured data is presented.

© 2012 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(290.1310) Scattering : Atmospheric scattering
(290.5870) Scattering : Scattering, Rayleigh
(330.1710) Vision, color, and visual optics : Color, measurement
(010.1690) Atmospheric and oceanic optics : Color

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: October 13, 2011
Manuscript Accepted: January 22, 2012
Published: April 20, 2012

Virtual Issues
Vol. 7, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Davide Magatti, Fabio Ferri, Paolo Ragazzi, Marta C. Pigazzini, Alessandro Averchi, and Paolo Di Trapani, "Colors of transparent submicron suspensions on approaching the Rayleigh regime," Appl. Opt. 51, 2183-2191 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-51-12-2183

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