Abstract: The invention relates to a device for the optical measurement of dental objects (30) with the use of topometric measurement procedures, having a rotatably mounted object receptacle (18) for holding the object (30) to be measured, a projector (11) for the projection of structured lighting patterns onto the object (30), a detection unit (12) for the detection of lighting structures projected onto the object (30), and an evaluation unit (20) for the calculation of the spatial structure of the object (30) to be measured. In order to improve operability, with the possibility of measuring individual parts of any geometry, the object receptacle (18) is mounted so as to be additionally pivotable around a pivot axis (B) arranged perpendicularly to the axis of rotation (A).

Abstract: The invention relates to a device for the optical measurement of dental objects (30) with the use of topometric measurement procedures, having a rotatably mounted object receptacle (18) for holding the object (30) to be measured, a projector (11) for the projection of structured lighting patterns onto the object (30), a detection unit (12) for the detection of lighting structures projected onto the object (30), and an evaluation unit (20) for the calculation of the spatial structure of the object (30) to be measured. In order to improve operability, with the possibility of measuring individual parts of any geometry, the object receptacle (18) is mounted so as to be additionally pivotable around a pivot axis (B) arranged perpendicularly to the axis of rotation (A).

Abstract: A differential holographic method and arrangement for measuring and testing the changing conditions of objects or articles, in which there are taken intermediate holograms of an unflawed reference object, and from which there are employed the reconstructed object waves of the reference object in order to illuminate the test object for a holographic exposure. Two reference beams record two intermediate holograms of the reference object on one holographic plate, and successively illuminate the test object with the reconstructed object wave fields from the intermediate holograms with utilization of the associated conjugated reference beams.