Process for applying a layered structure on a lens
US8562772B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Dec 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to an improvement for applying a layered structure onto a convex surface of a lens. After thermoforming the layered structure, a curvature direction of the layered structure is inverted. The structure is then applied on the lens surface by continuously pushing the structure against the lens surface, starting from a contact point between a convex surface of the structure and the convex surface of the lens. The curvature direction of the layered structure is then inverted again, so that it recovers the curvature direction that resulted from thermoforming. Stresses within the layered structure are then reduced, and the structure can be assembled with the lens without defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.