Based on the results of goniospectrophotometric measurements, physically based mathematical models of the spatial angular distributions of the luminous intensity and brightness factor are proposed for the coatings of structural materials. The models adequately describe the main scattering regularities of optical radiation by a rough surface in the visible and near-IR regions of electromagnetic waves and require no significant computing costs. Regularized regression dependences are obtained for the parameters of the model of the angular distribution of the luminous intensity on the cosine of the angle of incidence of the radiant flux. (C) 2019 Optical Society of America
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