CHARACTERIZATION OF THE ROUGHNESS OF PAPE R BY A LASER SENSOR

Optical profile testers allow a nondestroying and therefore exact meas urement of the topography of paper. It is possible to calculate roughn ess parameters according to DIN and to ISO from measured line profiles . The profiles can also be evaluated by Fourier Analysis and Autocorre lation Function. Roughness parameters from the optical profilometer Mi crofocus of the company UBM are compared with roughness values obtaine d by conventional roughness testers such as Bekk, Bendtsen, Parker-Pri nt-Surf, Hommel tester and KL smoothness meter. A further method to ch aracterize the surface is the frequency distribution of roughness vari ations, which can be applied to line profiles as well as to surface pr ofiles.