18 August 2005 Model calculations of polarization scattering from 3-dimensional objects with rough surfaces in the IR wavelength region
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Abstract
Model calculations have been done on 3-dimensional objects. The descriptions of the objects are in terms of facets that make it possible to use ray tracing geometrical optics as a technique to calculate the scattering from the objects. The Bidirectional Reflectance Distribution Function (BRDF) for different polarization states have been used to describe the reflectance at a certain facet. By using Monte Carlo calculations, the scattering from all the facet surfaces of the object is added to a total reflectance. Thus the total reflectance has been obtained for different polarization states and for different angles of reflectance throughout the whole scattering hemisphere. The model has been applied to rough surfaces of color and polarization contrast measures, for example the Degree Of Linear Polarization, has been calculated. Also, a simple background has been applied, in order to obtain contrast measures between the object and the background. Comparison is made with field measurements of a military vehicle.
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Goran Forssell, Goran Forssell, } "Model calculations of polarization scattering from 3-dimensional objects with rough surfaces in the IR wavelength region", Proc. SPIE 5888, Polarization Science and Remote Sensing II, 588818 (18 August 2005); doi: 10.1117/12.617830; https://doi.org/10.1117/12.617830
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