Method for curing a lens-forming fluid
US6103148A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Feb 19, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for curing a lens-forming fluid, including exposing the lens-forming fluid to an ultra-violet light, wherein the exposure time is between twenty seconds and thirty minutes, which can completely cure the fluid. The exposure can occur by placing the lens-forming fluid intermediate a plurality of ultraviolet light sources, in which the intensity of the ultra-violet light is at least 1.2.times.10.sup.-2 watts per square centimeter at a wavelength of 350 nanometers. The lens-forming fluid preferably is a monomer. The prior art, in contrast, requires significantly longer exposure times to cure monomer or other lens-forming fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.