Abstract: In a method of determining the 3D coordinates of the surface (1) of an object (2), the surface (1) of the object (2) is scanned by a scanner (3) for acquiring object data. The position and orientation of the scanner (3) for acquiring positional data are determined, in particular by a tracking system (4). The object data and the positional data are transferred to a controller (5) which determines the 3D coordinates of the surface (1) of the object (2) from them. To improve such a method, the object data are wirelessly transmitted from the scanner (3) to the controller (5).

Abstract: A method is used to calibrate a 3D measuring device (1). In order to calibrate any 3D measuring device (1) without specific manufacturer's know-how, one or more characterizing objects (15, 16, 17) of a reference object (14) are measured at one or more positions in measurement volume (12) of 3D measuring device (1) to be calibrated. A gauge of the measurement error is calculated from the measured values as a function of the position in measurement volume (12). From that, an error correction function is calculated (FIG. 3).

Abstract: A method is provided for the optical detection of a contrast line in which the area or spatial coordinates of the contrast line are detected, with the detection being performed by a scanner, preferably a laser scanner, which scans the contrast line in a linear manner. An apparatus is also provided for the optical detection of a contrast line having a laser diode, a deflection apparatus for the deflection of the laser beam emitted from the laser diode and having a detector for the detection of the reflected beams, with the deflection apparatus being designed movably such that the laser beam emitted from the laser diode can be shifted in parallel by an amount depending upon position of the deflection apparatus and where the spatial coordinates of the contrast line can be detected by analyzing the beams detected by the detector.