Method for processing an unfinished optical lens member for manufacture of an optical lens
US9664924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2013 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Dec 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of processing an unfinished optical lens member having a finished surface with a center reference point, and first and second surfaces, includes providing contour data defining the contour of the first surface in a finished cut state, the maximum distance between two points of the contour defined by Cmax; determining, an optical reference point of the first surface with respect to the contour, the optical reference point corresponding to a user's line of sight in the finished cut state, the maximum distance between the optical reference point and the contour defined by Mmax, providing a first surface dataset defining the second surface with respect to the optical reference point; and providing an unfinished optical lens member having a minimum distance RSF between the center reference point and the boundary of the unfinished lens member such that 2 RSF≧Cmax and RSF<Mmax.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.