2D scanner WLP

measurementfor surface inspectionedge

With conventional triangulation sensors, the measurement result depends very much on the structure and the angle of inclination of the surface. This leads to relatively large measurement uncertainties, which only allow the sensor to be used for less accurate measurement tasks. Better results are achieved with the Foucault laser sensor WLP (patent) integrated in the beam path of the Werth Zoom. This is particularly suitable for fast flatness measurements of surfaces tilted by up to 80° or correspondingly curved surfaces. • The unique Foucault principle of the Werth Laser Probe offers applications beyond the limits of typical TTL (Through The Lens) lasers due to its special design • The WLP is integrated directly into the beam path of an image processing sensor, so that very fast sensor changes are possible • In measuring operation, the laser scanning can be observed very well visually • High measuring speed when scanning contours or surface profiles Sensor principle Optical-axial (Foucault cutting edge) Accuracy Permissible probing error up to 0.75 µm Functionality Due to the asymmetry of the laser beam a) by the use of a Foucault cutting edge b), the diffusely reflected light hits different positions of the differential diode c), from which the distance to the workpiece surface d) is determined. A divider mirror e) is used to integrate the laser beam into an image processing sensor f) (illumination not shown).