A profilometer is a measuring device for two- or three-dimensional measurement of microscopic or submicroscopic surface topographies . Profilometers work either tactilely with a small diamond needle that scans the surface, or contactless with optical methods such as confocal technology or laser profilometry or white light interferometry .
The profiles measured in this way are typically evaluated using standardized methods, for example according to ISO 25178 or other methods of geometric product specification (GPS) , in order to derive characteristic parameters. The technical importance of profilometers results from the decisive influence of the surface characteristics on the material behavior.
- White Light Interferometer in the Encyclopedia of Laser Physics and Technology (Engl.)