Method and a device for working the periphery of an ophthalmic lens for eyeglasses
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsMichel Nauche, Gaël Mazoyer
Life of this patent
Estimating the term…
Abstract
A method of working the periphery of an ophthalmic lens (L), the periphery of the lens possessing an edge face (C) and the method including edging the edge face of the lens by machining with a first grindwheel (31) mounted to rotate about an axis of rotation (A4). According to the invention, during the edging, in addition to being free to rotate about the axis of rotation, the first grindwheel possesses two degrees of freedom to move in tilting about two distinct pivot directions that are substantially transverse to its axis of rotation.
Claims21
A method of working the periphery of an ophthalmic lens (L), the periphery of the lens (L) possessing an edge face (C) and the method including edging the edge face (C) of the lens (L) by machining with a first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D) mounted to rotate about an axis of rotation (A4), the method being characterized in that, during the edging, in addition to being free to rotate about said axis of rotation (A4), the first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D) possesses two degrees of freedom to move in tilting about two distinct pivot directions that are substantially transverse to its axis of rotation (A4).
A tool (30) for working the periphery of an ophthalmic lens (L), the tool comprising a support (38) and a first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D) mounted on the support (38), the first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D) presenting an edging face (99;
- 99A;
- 99B;
- 99C;
- 99D) that is circularly symmetrical about an axis of symmetry, the tool being characterized in that the first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D) is mounted on the support (38) by tilting mechanical connection means enabling the first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D) to pivot relative to the support (38) about two distinct pivot directions that extend substantially transversely relative to the axis of symmetry of the edging face (99;
- 99A;
- 99B;
- 99C;
- 99D) of the first grindwheel (31;
- 31A;
- 31B;
- 31C;
- 31D).
Dependencies are inferred from the claim text.