Surface roughness

Common card · No. 262676

Surface roughness or simply roughness is the quality of a surface that is not smooth and it is hence linked to human (haptic) perception of the surface texture. From a mathematical perspective, it is related to the spatial variability structure of surfaces and inherently, is a multiscale property. It has different interpretations and definitions depending on the disciplines considered. In surface metrology, surface roughness is a component of surface finish (surface texture). It is quantified by the deviations in the direction of the normal vector of a real surface from its ideal form. If these deviations are large, the surface is rough; if they are small, the surface is smooth. Roughness is typically assumed to be the high-frequency (short-wavelength) component of a measured surface. However, in practice it is often necessary to know both the amplitude and frequency to ensure that a surface is fit for a purpose.

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