Method of producing spectacle lens
US6872120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2001 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Jun 29, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A lens surface shape is created by a near-finish surface forming rough-cutting step of creating a near-finish surface shape analogous to a lens surface shape based on a prescription of a spectacle lens from a spectacle lens base material 11 by numerically controlled cutting, and a finish-cutting step of creating the lens surface shape based on the prescription of the spectacle lens from the near-finish surface shape by numerically controlled cutting. According to this method of producing a spectacle lens, all kinds of spectacle lenses including an inner surface progressive power lens can be produced with high productivity.A complex curved surface can be mirror-polished by a polishing tool, which includes an elastic sheet 41 having a curved surface, wherein a workpiece is polished by applying a pressure to the inner surface side of the elastic sheet 41, to stretch the elastic sheet 41 and bring the outer surface side of the elastic sheet 41 into contact with the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.