Abstract
Roughness is well known to be bandwidth dependent [1,2]. As a consequence, a surface may be superpolished for applications at visible wavelengths, but highly rough when illuminated with X-rays. Therefore it has become of relevant interest to predict the spectral variations of roughness. These variations must be taken into account in any normalization rule. Moreover, they permit to know at which wavelengths specular fluxes start to vanish before they are turned into diffuse fluxes.
© 1998 Optical Society of America
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