Method of machining a face of an ophthalmic lens that is prism-ballasted at the centre
US8215210B2 · kind B2 · utility
0Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2006 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Mar 23, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2502
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method of machining a face (3) of an ophthalmic lens (1) with a main machining step in which the position of a machining tool (8) is synchronised with the angular position of the ophthalmic lens (1) which is rotated around an axis of rotation (4) that is transverse to the face (3), in order to provide the face with a machined surface that is asymmetrical in relation to the axis of rotation (4) of the ophthalmic lens (1); and a complementary machining step in which a recess (22) is machined around the axis of rotation (4) of the lens (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.