Method for marking or drilling holes in glass lenses and device for realizing the same

A centering device for lens blanks, comprising:

• a carrier configured to receive a lens blank or a lens template having at least one bore therethrough, the lens template including one of a template spectacle lens, a pattern disk and a support disk;
• a swinging arm having a holding part to affix the holding part on the lens blank;
• a display screen;
• an electronic control unit to display an image of the lens template on the display screen, the bore of the lens template being displayed with respect to a system of coordinates;
• and
• at least one of a keyboard and a mouse to move a cursor over the image of the lens template to record a position of the bore.

A device to at least one of mark and drill holes in a workpiece spectacle lens, the device comprising:

• a spectacle lens edging machine including a computer to control form grinding of the workpiece spectacle lens, a grinding chamber, at least one grinding wheel in the grinding chamber, and a rotatable spectacle lens holding shaft which can be adjusted radially and axially relative to the grinding wheel and locked;
• an arrangement to at least one of mark and drill the holes into the workpiece spectacle lens, the arrangement including an encoding arrangement operable to detect an angle of the spectacle lens holding shaft, including an angle sensor operable to acquire an angle of rotation of the spectacle lens holding shaft, the arrangement further including an arm and a high-speed drill drive situated on the arm to at least one of mark and drill the holes, the arm being motionally coupled to one of the spectacle lens holding shaft and the grinding wheel in an X-direction and a Y-direction;
• a scanning arrangement having a sensing element to scan a position of the holes, the scanning arrangement being motionally coupled to at least one of the spectacle lens holding shaft and the grinding wheel in an X-direction and a Y-direction;
• and
• a positioning device to position the arrangement, the positioning device including a position sensor to acquire a radial distance of the spectacle lens holding shaft from the grinding wheel, and including a position sensor to acquire an axial position of the spectacle lens holding shaft with reference to the grinding wheel, and an input device to accept input coordinates including at least one of rectangular input coordinates and polar input coordinates of the holes into the computer.