Abstract

Separation of the scattering contribution from the total optical attenuation is necessary to determine the absorption portion of nonhomogeneous media such as naturally occurring minerals. In order to investigate experimentally the applicability of a previously developed two-flux radiative transfer model that takes into account surface reflections and collimated incidence, we have measured pulverized and sintered scattering standards prepared from a glass of known absorption coefficient variation. The new model produces an accuracy improvement up to a factor of 2.5 over the Kubelka-Munk theory. Off-axis scattering measurements were made with improved instrumentation between 0.33 μm and 2.7 μm. The model was then applied to the mineral rhodochrosite in this range to obtain accurate values of scattering and absorption.

© 1973 Optical Society of America

Determination of Absorption and Scattering Coefficients for Nonhomogeneous Media. 1: Theory

J. Reichman
Appl. Opt. 12(8) 1811-1815 (1973)

Determination of the Optical Absorption Coefficient of Powdered Materials Whose Particle Size Distribution and Refractive Indices Are Unknown

James D. Lindberg and David G. Snyder
Appl. Opt. 12(3) 573-578 (1973)

Optical Properties of Naturally Occurring Rhodochrosite Between 0.33 μm and 25 μm

W. G. Egan and T. Hilgeman
Appl. Opt. 10(9) 2132-2136 (1971)

Determination of Kubelka–Munk scattering and absorption coefficients by diffuse illumination

Robert Molenaar, Jaap J. ten Bosch, and Jaap R. Zijp
Appl. Opt. 38(10) 2068-2077 (1999)

Absorption-coefficient-determination method for particulate materials

James D. Lindberg, Rex E. Douglass, and Dennis M. Garvey
Appl. Opt. 33(19) 4314-4319 (1994)