Composite ophthalmic lenses

Details Composite ophthalmic lenses Composite ophthalmic lenses

1992-07-01

1994-06-21

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351166, G02C 702

Patent

active

053231910

ABSTRACT:
This invention is directed to the production of glass-plastic lenses consisting of a thin glass element bonded to a relatively thick transparent lens or lens preform made of poly(diethylene glycol)bis(allyl carbonate) by a transparent thermoset, polyurethane adhesive layer of optical quality having an elongation at rupture of at least 200% and an elastic modulus in the range of 0.13-10 MPa and at 100% elongation.

REFERENCES:
patent: 4268134 (1981-05-01), Gulati et al.
patent: 4592947 (1986-06-01), Hunter et al.
patent: 4793703 (1988-12-01), Fretz, Jr.
patent: 4857407 (1989-08-01), Coleman et al.
patent: 5064712 (1991-11-01), Fretz, Jr.
patent: 5116684 (1992-05-01), Fretz, Jr. et al.

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