Method for producing an ophthalmic lens comprising a base lens and a film structure
US9283717B2 · kind B2 · utility
1Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2010 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Jul 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/0073
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing an ophthalmic lens comprised of a base lens and a film structure bound to said base lens includes a pressure-free heating. Said heating is performed after assembling the film structure with a semi-finished lens (1), and before said semi-finished lens is machined for obtaining the base lens. Although a maximum heating temperature is higher than a glass-transition temperature of the semi-finished lens, no image distortion and optical aberration is produced for the final ophthalmic lens. The maximum heating temperature is also lower than a glass-transition temperature of the film structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.