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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 1 — Jan. 1, 2001
  • pp: 85–94

Reflectance of pigmented polymer coatings: comparisons between measurements and radiative transfer calculations

William E. Vargas and Gunnar A. Niklasson  »View Author Affiliations


Applied Optics, Vol. 40, Issue 1, pp. 85-94 (2001)
http://dx.doi.org/10.1364/AO.40.000085


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Abstract

Solar reflectance spectra of pigmented coatings have been obtained from spectroscopic measurements involving integrating sphere attachments. We demonstrate that measured and computed reflectances of an extended four-flux model [Appl. Opt. 37, 2615 (1998)] whose average path-length parameters (APP’s) and forward-scattering ratios (FSR’s) are explicitly evaluated from a multiple-scattering approach at the front or back interface of the particulate coatings display fairly good agreement. The agreement of these properties in a standard four-flux model [Appl. Opt. 23, 3353 (1984)], which neglects the spectral dependence of the APP and FSR, is found in the near infrared. Good agreement between these two four-flux approaches over the solar spectral range is obtained when the mean values of the APP’s and FSR’s are used in the standard model.

© 2001 Optical Society of America

OCIS Codes
(030.5620) Coherence and statistical optics : Radiative transfer
(110.7050) Imaging systems : Turbid media
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(160.4670) Materials : Optical materials
(160.4760) Materials : Optical properties
(260.2160) Physical optics : Energy transfer

History
Original Manuscript: December 6, 1999
Revised Manuscript: September 21, 2000
Published: January 1, 2001

Citation
William E. Vargas and Gunnar A. Niklasson, "Reflectance of pigmented polymer coatings: comparisons between measurements and radiative transfer calculations," Appl. Opt. 40, 85-94 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-1-85

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