Open AccessSpectral determination of a two-parametric phase function for polydispersive scattering liquids
Author(s) -
Tobias Lindbergh,
Ingemar Fredriksson,
Marcus Larsson,
Tomas Strömberg
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.001610
Subject(s) - optics , materials science , calibration , integrating sphere , collimated light , scattering , monte carlo method , spectral line , phase (matter) , light scattering , physics , mathematics , laser , statistics , quantum mechanics , astronomy
A method for determining a two-parametric Gegenbauer-kernel phase function that accurately describes the diffuse reflectance from a polydispersive scattering media at small source-detector separations (0.23 to 1.2 mm), is presented. The method involves spectral collimated transmission measurements, spatially resolved spectral diffuse reflectance (SRDR) measurements, and inverse Monte Carlo technique. Both absolute calibration (using a monodispersive polystyrene microsphere suspension) and relative calibration (eliminating differences between fibers) of SRDR spectra yielded comparable results. When applied to water dilutions of milk, simulated and measured spectra deviated less than 6.5% and 2.5% for the absolute and relative calibration case, respectively, even for the closest fiber separation. Corresponding values for milk including ink as an absorber, were 13.4% and 7.3%.