Patent ID: 8446595

Claim:
Method for acquisition of contour data of a three-dimensional object, in particular of a semitransparent object, such as a dental object, wherein preferably by means of an optical device preferably for confocal or OCT (optical coherence tomography)—or depth of focus—beam projections, grids of illumination points of a multi-point illumination is projected onto the object and these are then projected back onto a sensor which has pixels, characterized in that rasters of illumination points from at least two multi-point illuminations are projected onto the object, that the emissions of the illumination points of the multi-point illuminations are modulated in their intensities and that a frequency and/or phase-selective detection of the first and second reciprocally assigned illumination points that are projected back onto the sensor occurs, wherein the first illumination points originate from a first and the second illumination points from a second of the at least two multipoint-illuminations, and that for the determination of contour data differences of intensity and/or frequency of the measuring signals of adjacent pixels of the sensor are evaluated, onto which the reciprocally assigned first and second pixels are imaged.