Random rough surfaces that produce a Lambertian distribution of radiant intensity.
The inadequacy of the Kirchhoff approximation and the small-scattering-angle assumption to describe Lambertian rough surfaces is discussed. It is shown, however, that the small-perturbation method based on the extinction theorem recently put forward permits the construction of perfectly conductive, slightly rough surfaces, which produce a Lambertian distribution for the diffuse part of the mean radiant intensity.
Nieto-Vesperinas
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