B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 11/00 (2006.01)
Patent
CA 2618588
Systems and methods of manufacturing ophthalmic lenses, for example, silicone hydrogel contact lenses, are provided. The present systems and methods provide certain amounts of ultraviolet light to contact lens mold assemblies that comprise a silicone hydrogel precursor composition. For example, the systems and methods may proide ultraviolet light at an intensity from 20 ~W/cm2 to 4000 ~W/cm2. The ultraviolet light intensity can be provided as substantially uniform levels to provide consistent curing for batches of silicone hydrogel contact lenses.
L'invention concerne des systèmes et des procédés de fabrication de lentilles ophtalmiques, par exemple, des lentilles de contact en silicone hydrogel. Les systèmes et procédés de l'invention permettent d'appliquer certaines quantités de lumière ultraviolette sur des ensembles de moulage de lentilles de contact qui comprennent une composition de précurseur de lentille en silicone hydrogel. Par exemple, lesdits systèmes et procédés permettent d'appliquer une lumière ultraviolette à une intensité comprise entre 20 µW/cm2 et 4000 µW/cm2. L'intensité de lumière ultraviolette appliquée peut présenter des niveaux sensiblement uniformes afin d'assurer le durcissement régulier de lots de lentilles de contact en silicone hydrogel.
Borden Ladner Gervais Llp
Coopervision Inc.
Coopervision International Holding Company Lp
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