Laminated glass lenses

Details Laminated glass lenses Laminated glass lenses

1987-08-03

1988-12-27

Arnold, Bruce Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351166, 351177, G02C 710, G02C 702

Patent

active

047937033

ABSTRACT:
This invention relates to the fabrication of three-layer composite lenses especially suited for ophthalmic applications. The lenses comprise a thin layer of an inorganic glass, desirably photochromic glass, an organic plastic, and an organic adhesive exhibiting flexibility and can be cured at temperatures in the vicinity of room temperature. In general, the linear coefficient of expansion of the glass ranges between about 60-120.times.10.sup.-7 /.degree.C. and that of the plastic between about 200-700.times.10.sup.-7 /.degree.C.

REFERENCES:
patent: 4079160 (1978-03-01), Philipson
patent: 4264156 (1981-04-01), Spycher
patent: 4268134 (1981-05-01), Gulati et al.
patent: 4311762 (1982-01-01), Spycher et al.
patent: 4679918 (1987-07-01), Ace

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