Method and mold to control optical device polymerization
US6772988B2 · kind B2 · utility
7Cited by
14References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2001 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Mar 1, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and mold assembly to control the polymerization of a cast optical device. The mold assembly includes at least one mold portion having a non-critical surface with fresnel or diffractive geometry. Alternately, a fresnel lens or diffractive lens may be placed at a predetermined distance from the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.