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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 7 — Jul. 16, 2007

Estimation of complex refractive index of polydisperse particulate systems from multiple-scattered ultraviolet–visible–near-infrared measurements

M. A. Velazco-Roa and S. N. Thennadil  »View Author Affiliations

Applied Optics, Vol. 46, Issue 18, pp. 3730-3735 (2007)

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A method to extract the complex refractive index of spherical particles from a polydisperse suspension at concentrations where multiple light-scattering effects are significant is presented. The optical constants are estimated from total diffuse reflectance and transmittance measurements and inverting the measurements using the radiative transfer equation (RTE) and the Mie theory for scattering by polydisperse spherical particles. The method is tested by applying it to three different polydisperse polystyrene suspensions and extracting the optical constants of polystyrene particles in the wavelength range of 450 1200   nm . The effect of particle size, concentration, and polydispersity on the estimated values of the optical constants is also discussed.

© 2007 Optical Society of America

OCIS Codes
(290.3030) Scattering : Index measurements
(290.4020) Scattering : Mie theory
(290.4210) Scattering : Multiple scattering
(290.5820) Scattering : Scattering measurements
(290.5850) Scattering : Scattering, particles
(290.7050) Scattering : Turbid media

ToC Category:

Original Manuscript: January 29, 2007
Manuscript Accepted: March 9, 2007
Published: May 31, 2007

Virtual Issues
Vol. 2, Iss. 7 Virtual Journal for Biomedical Optics

M. A. Velazco-Roa and S. N. Thennadil, "Estimation of complex refractive index of polydisperse particulate systems from multiple-scattered ultraviolet-visible-near-infrared measurements," Appl. Opt. 46, 3730-3735 (2007)

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