Patent ID: 7483150

Claim:
A measuring device for measuring the shape and/or roughness of workpiece surfaces, comprising a confocal sensor arrangement including at least one light source and an object lens which generates at least two spatially distanced focal points, as well as at least two photo receptors which are associated with the different focal points; a first positioning device connected to the confocal sensor arrangement and having a first positioning direction essentially identical to a measuring direction of the measuring device; a second positioning device connected to the confocal sensor arrangement and having a second positioning direction oriented essentially perpendicularly to the measuring direction of the measuring device, wherein the second positioning device forms part of a feeding device having a pivotal arm and an angle indicator or a position sensor, and wherein the pivotal arm carries the sensor arrangement; and a computing circuit, whose inputs are connected to the photo receptors and which generates at its output a differential signal serving for a distance measurement.