DEVICE AND METHOD FOR OPTICAL MEASUREMENT OF AN INTERNAL CONTOUR OF A SPECTACLE FRAME

摘要

The present invention relates to a device (110) and a method (176) for optical measurement of an internal contour (112) of a spectacle frame (116). The device (110} comprises an optical unit (124) which is designed to detect light reflected from an illuminated portion (138) of the internal contour (112) of the spectacle frame (116). The optical unit (124) can be inserted into the internal contour (112) of the spectacle frame (116) and, when properly inserted into the internal contour (112) of the spectacle frame (116), is mounted so as to be rotatable with respect to the spectacle frame (116). The optical unit (124) comprises at least one light source (126), an objective (128) and at least one optical sensor (130), wherein: the light source (126) is designed to produce a light section (140); at least one portion (138) of the internal contour (112) can be illuminated by means of the light section (140); the objective (128) is designed to project the illuminated portion (138) of the internal contour (112) onto the optical sensor (130); and the optical sensor (130) is designed to detect the light reflected from the illuminated portion (138) of the internal contour (112). The light source (126), the portion (138) of the internal contour (112) that can be illuminated, the objective (128) and the optical sensor (130) are arranged relative to one another in such a way that the portion (138) of the internal contour (112) that can be illuminated by the light section (140) can be placed in an object-side focal plane (148) and that the optical sensor (130) can be arranged in an image-side focal plane (150), wherein the object-side focal plane (148), an objective plane (152) and the image-side focal plane (150) intersect in a common straight line. The invention also relates to a system (186) for optical measurement of a pair of spectacles (114) and to a method (200) for producing a pair of spectacles (114).