15 October 2012 How accurate is the Kubelka-Munk theory of diffuse reflection? A quantitative answer
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Abstract
The (heuristic) Kubelka-Munk theory of diffuse reflectance and transmittance of a film on a substrate, which is widely used because it gives simple analytic results, is compared to the rigorous radiative transfer model of Chandrasekhar. The rigorous model has to be numerically solved, thus is less intuitive. The Kubelka-Munk theory uses an absorption coefficient and scatter coefficient as inputs, similar to the rigorous model of Chandrasekhar. The relationship between these two sets of coefficients is addressed. It is shown that the Kubelka-Munk theory is remarkably accurate if one uses the proper albedo parameter.
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Richard I. Joseph, Michael E. Thomas, "How accurate is the Kubelka-Munk theory of diffuse reflection? A quantitative answer", Proc. SPIE 8495, Reflection, Scattering, and Diffraction from Surfaces III, 84950I (15 October 2012); doi: 10.1117/12.929948; https://doi.org/10.1117/12.929948
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