Machining method by turning a face of a spectacle lens
US9261876B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2010 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Jan 21, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A machining method for machining a surface of a spectacle lens at a fixed rotation speed, includes a step of determining the rotation speed from geometric characteristics of the surface, characterized in that the step of determining the rotation speed includes the following steps: a value (Maxdiff) representative of the largest difference in geometric value of the mean sphere on the surface is determined; and the rotation speed is deduced from the value (Maxdiff) of the largest difference in geometric values of the mean sphere on the surface and from a geometric value of the cylinder (FV torus) at a predetermined far-vision control point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.