METHOD AND APPARATUS FOR THREE-DIMENSIONAL CAPTURE OF A THREE-DIMENSIONAL SURFACE OF A WORKPIECE

In the method, the workpiece is received by way of the coaxial bearing surfaces thereof in centred fashion in upwardly open bearing elements (18, 20) with a horizontally aligned axis of rotation in an apparatus (1) and said workpiece is held purely by its own weight; an optical measurement apparatus (37) operating according to the laser light section method with two sensors (38, 40), each sensor (18, 20) capturing a different side of a plane that lies between the sensors and that is radial to the axis of rotation, is moved around the resting workpiece and the three-dimensional position of a multiplicity of points of the three-dimensional surface of a portion of the workpiece is measured from a plurality of positions by the measurement apparatus (37). The measurement apparatus (37) is attached to a hollow spindle (28) with a holder (36), said hollow spindle being arranged on the frame (2) in coaxial fashion in relation to the axis of rotation. As a result of the hollow spindle (28), the measurement apparatus (37) is guided along a circular trajectory around the axis of rotation of the workpiece