Method of preparing an ophthalmic lens with special machining of its engagement ridge
US8556419B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2009 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B9/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of preparing an ophthalmic lens for mounting in a surround of an eyeglass frame includes an acquisition step of acquiring a first longitudinal profile of the surround and an orientation parameter of the first longitudinal profile relative to a horizon line or a verticality line of the surround, and an edging step of edging the ophthalmic lens so as to form a generally profiled engagement ridge of desired section that extends along a second longitudinal profile (25) that is derived from the first longitudinal profile and of orientation that is derived from the orientation parameter. The method includes a determination step of determining at least one singular portion (Z1-Z12) of the second longitudinal profile as a function of the orientation parameter. During the edging step, the engagement ridge is locally pared away in the singular portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.