Patent ID: 9106807
Filing Date: 2015-08-11
Classification: G01B,G01N,H04N

Abstract:
1. A device for noncontact determination of an edge profile at a disk-shaped object, the device comprising: a turntable for rotating the disk-shaped object around an axis of rotation and a measuring arrangement for radial positioning of at least one light source for illuminating an edge region of the disk-shaped object in a virtually radial direction to the axis of rotation thereof; at least one camera for recording the illuminated edge region, the camera being arranged in a base plane extending parallely and medially between the plane faces of the disk-shaped object; a plurality of laser radiation light sources with a line-shaped beam profile, each laser radiation source emitting a line-shaped light bundle, the plurality of laser radiation sources forming line-shaped light bundles arranged to be coplanar in a common plane representing a measurement plane oriented orthogonal to a base plane, the line-shaped light bundles being directed from different directions to a common intersection in the illuminated edge region of the object; and a light sheet comprised of the line-shaped light bundles formed in the measurement plane; wherein the at least one camera serving as a base camera is directed to the base plane laterally to the measurement plane, so that the at least one camera records scattered light propagating from a light line illuminated by the light sheet in the edge region of the object.