Abstract: A method for testing a tire by interferometry in a pressure chamber of a tire testing device includes capturing phase images at different pressures in the pressure chamber, generating partial phase difference images between successive phase images, and summing the partial phase difference images to form an overall phase difference image. The pressure in the pressure chamber is changed in a first direction during a first measurement phase and the pressure is changed in the opposite direction during a second measurement phase, wherein at least one partial phase difference image from the first measurement phase and at least one partial phase difference image from the second measurement phase are included in the summation.

Abstract: A tracking system for determining at least one spatial position and an orientation of at least one measurement object includes at least three cameras. The at least three cameras are each arranged at different spatial positions. Each of the at least three cameras has at least two color subsystems. Each of the color subsystems has at least one bandpass filter. Each of the bandpass filters of the color subsystems of the respective camera has different passbands.

Abstract: In a process for determining the 3D coordinates of an object (1), a partial surface of the object (1) is recorded by a 3D measuring device (2), and the 3D coordinates of this partial surface of the object (1) are determined. Additional partial surfaces of the object (1) are recorded by the 3D measuring device (2), and the 3D coordinates of these partial surfaces are determined. The 3D coordinates of the partial surfaces of the object (1) are assembled by a processing device (3). In order to improve this process, the exposures and/or the 3D coordinates of one or more partial surfaces of the object (1) are represented on a head-mounted display (4) (FIG.1).

Abstract: A 3D measuring system having a projector, a camera and a chassis that connects the projector and the camera, characterized by a heating device for heating one or more components of the 3D measuring system.

Abstract: In a method for determining the 3D coordinates of an object a pattern (6) is projected onto the object (1) by a projector (3), the light reflected by the object (1) is captured by a camera (4), and the shots recorded by the camera (4) are evaluated. Reference marks (8) on and/or beside the object (1) are recorded by a reference camera (5). The reference camera (5) has a larger field of view (9) than the camera (4). To improve such method, the reference camera (5) is connected with the camera (4) or with a 3D sensor (2) which comprises the projector (3) and the camera (4).