Method for molding contact lenses using ultraviolet energy
US4382902A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Feb 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a fabrication process for molding a contact lens evincing the required optical properties. This method consists in designing a mold (1,2) with a high thermal inertia, transparent to, or little absorbing electromagnetic waves with wavelengths between 1 micron and 10.sup.-6 microns, in developing a base composition from polymerizing double-bond monomers which are absorbing with respect to these waves and in securing the polymerization of the composition inside the closed mold by irradiating with the above-cited electromagnetic waves at a power density such as to keep the temperature approximately less than 40.degree. C. at the mold level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.