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13 September 2007 Degrees of freedom in depolarizing Mueller matrices
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Abstract
Most measured Mueller matrices tend to be slightly non physical due to noise and calibration issues. Based on a simple white noise model and higher dimensional geometrical considerations, only 1 out of 90 measured Mueller matrices for a non depolarizing sample should be physical, a number given by the relation [equation] which describes the ratio of the 9-dimensional solid angle inside a 9-dimensional 45° cone to the 9- dimensional solid angle in the entire 9-dimensional hypersphere. The remaining majority of measured matrices would be expected to be slightly non physical.
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Russell A. Chipman "Degrees of freedom in depolarizing Mueller matrices", Proc. SPIE 6682, Polarization Science and Remote Sensing III, 66820I (13 September 2007); https://doi.org/10.1117/12.735892
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