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

Thomas A. Germer; Heather J. Patrick

doi:10.1117/12.892713

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9 September 2011 Mueller matrix bidirectional reflectance distribution function measurements and modeling of diffuse reflectance standards

Thomas A. Germer, Heather J. Patrick

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Proceedings Volume 8160, Polarization Science and Remote Sensing V; 81600D (2011) https://doi.org/10.1117/12.892713
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

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Thomas A. Germer and Heather J. Patrick "Mueller matrix bidirectional reflectance distribution function measurements and modeling of diffuse reflectance standards", Proc. SPIE 8160, Polarization Science and Remote Sensing V, 81600D (9 September 2011); https://doi.org/10.1117/12.892713

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