Method and apparatus for manufacturing composite lenses

B - Operations – Transporting – 29 – D

Patent

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B29D 11/00 (2006.01) B29C 33/00 (2006.01) B29C 35/08 (2006.01) B29C 39/00 (2006.01) B29C 70/78 (2006.01) G02B 1/04 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2182720

A method for making improved optical quality lenses is described. The method includes arranging a mold (13) having a molding surface, a curable optical quality resin composition, and a plastic lens preform (11) of optical quality material such that the resin composition (16) is disposed between, and in contact with the plastic lens preform (11) and the mold (13). Upon curing, the resin composition forms a cured plastic attached portion that is bonded to the plastic lens preform. The resin composition and plastic lens preform (11) are selected such that the attached portion has a higher scratch resistance, a lowerchromatic aberration, and/or a higher ease of edging than the lens preform.

La présente invention concerne un procédé de fabrication de lentilles de qualité optique améliorée. Ce procédé consiste à mettre en place un moule (13) avec une surface de moulage, une composition résineuse durcissable de qualité optique et une préforme (11) de lentille plastique de qualité optique de telle manière que la composition résineuse (16) se trouve entre la préforme (11) et le moule (13) et en contact avec les deux. Après durcissement, la composition résineuse forme une partie rapportée en matière plastique durcie, fixée à la préforme de lentille plastique. La composition résineuse et la préforme (11) de lentille plastique sont choisies de manière à obtenir une partie rapportée plus résistante à la rayure, de moindre aberration chromatique et/ou dont les bords sont plus faciles à tailler que la préforme de lentille.

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