Method for centering a semifinished spectacle lens blank
US7611242B2 · kind B2 · utility
1Cited by
15References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Oct 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C13/003
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a method for the parallax-free centering of an optical element, in particular a semifinished product of a future spectacle lens, on a holder of a centering or mounting device, the optical element is provided with engravings, anti centering of the optical element is performed with the aid of the engravings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.