Abstract
A description of metal surface roughness has been obtained by introducing dispersion of the roughness distribution as a new parameter. The optical reflectance of nickel, aluminium, copper and brass specimens have been investigated experimentally using HeNe and Ar + lasers. From the wavelength dependence of reflectance observed for nickel and aluminium specimens, it is feasible that an industrial on-line system could be used to monitor surface roughness.
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