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Proceedings Paper

Mueller matrix bidirectional reflectance distribution function measurements and modeling of diffuse reflectance standards
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Paper Abstract

We measure the Mueller matrix bidirectional reflectance distribution function (BRDF) of pressed and sintered powdered polytetrafluoroethylene (PTFE) reflectance standards for an incident angle of 75°. Rotationallyaveraged Mueller matrices from the materials showed a small asymmetry M12 ≠ M21 and M34 ≠ -M43 in the in-plane geometry. This asymmetry, however, followed Helmholtz reciprocity rules. A significant anisotropy was observed in the sintered samples, which was manifested as non-zero off-block diagonal elements that depended upon rotation of the samples. Modeling using a Mueller matrix extension to the radiative transfer equation was performed. While there was not quantitative agreement, some aspects of the data were observed, including the asymmetry. Availability of an improved Mueller matrix phase function should improve the quality of the model-experiment agreement.

Paper Details

Date Published: 10 September 2011
PDF: 10 pages
Proc. SPIE 8160, Polarization Science and Remote Sensing V, 81600D (10 September 2011); doi: 10.1117/12.892713
Show Author Affiliations
Thomas A. Germer, National Institute of Standards and Technology (United States)
Heather J. Patrick, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 8160:
Polarization Science and Remote Sensing V
Joseph A. Shaw; J. Scott Tyo, Editor(s)

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