Back خشونة السطح Arabic Kələkötürlük Azerbaijani Rugositat Catalan Drsnost (materiál) Czech Rauheit German Rugosidad (mecánica) Spanish Pinnakaredus Estonian زبری سطح Persian Pinnankarheus Finnish État de surface (mécanique) French
Surface roughness or simply roughness is the quality of a surface of not being 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 it 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.