Composite ophthalmic lens

Details Composite ophthalmic lens Composite ophthalmic lens

1990-09-28

1992-05-26

Sluby, P. C.

Stock material or miscellaneous articles

Composite

Of epoxy ether

428426, 428913, 428428, 428323, 264 17, 264212, B32B 2738, G02C 710

Patent

active

051166844

ABSTRACT:
An improvement in the epoxy plastic element of a laminated, glass-plastic, ophthalmic lens structure, and a method of effecting the improvement, are disclosed. The improved element is cast from a casting mix in which the ingredients are maintained in certain relationships to each other to provide an optically clear casting essentially free of striations. The cast material is gelled at a low temperature not over about 100.degree. C., and may then be cured at a temperature up to 200.degree. for a period of at least two hours.

REFERENCES:
patent: 4432832 (1984-02-01), Fantone
patent: 4756972 (1988-07-01), Kloosterboer et al.

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