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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 10 — Apr. 1, 2001
  • pp: 1672–1681

Optical characterization method for black pigments applied to solar-selective absorbing paints

Tuquabo Tesfamichael, Anders Hoel, Gunnar A. Niklasson, Ewa Wäckelgård, Marta K. Gunde, and Zorica C. Orel  »View Author Affiliations


Applied Optics, Vol. 40, Issue 10, pp. 1672-1681 (2001)
http://dx.doi.org/10.1364/AO.40.001672


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Abstract

We propose a novel, to our knowledge, method for characterizing the optical properties of pigment particles or powders. Measurements of the diffuse and the total transmittance as well as the diffuse and the total reflectance are used to obtain effective scattering and absorption coefficients per unit length for the particles that are dispersed in a continuous matrix. For dilute dispersions in the single-scattering regime scattering and absorption cross sections of the particles were obtained. The method was applied to two pigments, namely, FeMnCuO x and black carbon. The data were obtained by use of pellets consisting of low concentrations of FeMnCuO x or black-carbon pigments dispersed in a KBr matrix. The pigment volume concentrations used to evaluate the scattering and the absorption coefficients ranged from 0.053% to 0.530% for FeMnCuO x and 0.076% to 0.310% for the black carbon. These ranges were found to exhibit the linear dependence of the coefficients as a function of volume fraction, as given by single-scattering theory.

© 2001 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(290.5850) Scattering : Scattering, particles
(300.6190) Spectroscopy : Spectrometers
(310.3840) Thin films : Materials and process characterization
(350.6050) Other areas of optics : Solar energy

History
Original Manuscript: December 4, 2000
Revised Manuscript: December 4, 2000
Published: April 1, 2001

Citation
Tuquabo Tesfamichael, Anders Hoel, Gunnar A. Niklasson, Ewa Wäckelgård, Marta K. Gunde, and Zorica C. Orel, "Optical characterization method for black pigments applied to solar-selective absorbing paints," Appl. Opt. 40, 1672-1681 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-10-1672

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