Device for machining an ophthalmic lens

US8460056B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Ahmed Haddadi · Charenton-le-Pont, FR
• Francisco Briegas · Charenton-le-Pont, FR

Key dates

• Filing date: Dec 22, 2009
• Grant date: Jun 11, 2013
• Expiry date: Feb 29, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24B9/148
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The shaper device for shaping an ophthalmic lens comprises a blocking support on a blocking axis, a shaper tool, an electronic or computer unit for controlling the position of said shaper tool, and a man/machine interface connected to said electronic or computer unit, and comprising a display screen (253) and input means for inputting numerical values. The electronic or computer unit is adapted to display on said display screen at least three so-called “offset” fields (301-304) for inputting numerical values via said input means, the fields being displayed simultaneously or in succession, then for generating a control setpoint for said shaper tool relative to said blocking support, for shaping the ophthalmic lens by forming an engagement ridge on its edge face, the ridge presenting, at each axial section of the ophthalmic lens, a profile having front and rear ends that present respective first and second distances from the blocking axis, with the difference between said distances being a so-called “offset” function that is not entirely uniform around the edge face of the ophthalmic lens, and that depends on the numerical values input in each of the offset fields.