MEASURING DEVICE AND METHOD FOR CONTACTLESS DETERMINING OF THE 3-DIMENSIONAL FORM OF A PERIPHERAL GROOVE IN A SPECTACLE FRAME
The invention relates to a measuring device for the contactless determining of the 3-dimensional shape of a peripheral groove in a spectacle frame. The device has a light source, which light beam is directed onto the groove or can be deviated onto it by means of an optical deviation system. It also comprises an optical image system which images the light reflected by the groove on an optic detector unit, and which is mounted centrally to the spectacle frame groove on an optic detector unit, and which is mounted centrally to the spectacle frame groove that is to be measured. Said measuring device furthermore comprises a holding device which holds the spectacle frame and which is mounted rotationally in respect of the light source, the detector device and the optic image system around a centering axis of a surface delimited by the peripheral groove of the spectacle frame. Lastly, the measuring device comprises an evaluation unit for determining the 3-dimensional form of the groove, which functions in accordance with the triangulation principle. The invention also concerns the corresponding method.