Finnegan, Henderson, Farabow, Garrett and Dunner, L.L.P.
Lens frame shape measuring apparatus
A lens frame shape measuring apparatus wherein a contact element 216 supported by a contact element moving mechanism is brought into abutment against a groove formed in an inner peripheral surface of a lens frame LF (RF) of a glasses frame MF and is moved along the said groove to measure the shape of the lens frame 272 by a moving position of the contact element 216, the apparatus comprising a radius vector measuring means 217 for detecting a moving distance of the contact element 216 when the contact element is moved from a movement start position P1 at the center of the lens frame 272 up to a central position Rm1 in the right and left direction of a lower rim 272a of the lens frame 272 and is brought into contact with the lower rim 272a, and a measurement control means which identifies a lens frame shape of the glasses frame MF by the moving distance detected by the radius vector measuring means 217 and which controls a contact measurement state of the contact element 216 for the lens frame 272 in accordance with a measurement sequence corresponding to the thus-identified lens frame shape.
Kabushiki Kaisha Topcon
G B
G01B B24B
inventional inventional
Yasuo
Suzuki