A Characterization of Surface Texture Profiles

The spectral analysis of surface texture data is extended so as to include the longer wavelength ‘waviness’ features in addition to the ‘roughness’ aspects. This results in the identification of an underlying form in the spectral estimates of engineering surfaces whose complete description requires only two parameters. Also, by showing that the spectral estimates converge to a final steady value at the longer wavelengths, the need to select and apply a standard cut-off filter is avoided.