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1 September 2010 Experimental confirmation of the Rayleigh-Rice obliquity factor
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In recent years paper have been published on the limitations of the Rayleigh Rice vector perturbation theory relating scattering (given by the bidirectional reflectance distribution function or BRDF) to surface roughness (given by the power spectral density function or PSD). In addition to the restrictions that the surface be optically smooth, clean and front surface reflective, the Rayleigh-Rice relationship has been criticized because calculations of the PSD from the BRDF often produce a high frequency (high scatter angle) peak. Variations in the wavelength and/or incident angle produce variations in the peak, so it is clear that the peak is not truly a part of the surface PSD. Recently a change was suggested to the expression that removes the peak. This paper presents data proving that the original expression is correct and implies that the peak is the result of scatter from non-topographic sources. In other words the surface is not clean, or is not front surface reflective.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John C. Stover "Experimental confirmation of the Rayleigh-Rice obliquity factor", Proc. SPIE 7792, Reflection, Scattering, and Diffraction from Surfaces II, 77920J (1 September 2010);


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