Ophthalmic lens with locally variable index of refraction and me

Details Ophthalmic lens with locally variable index of refraction and me Ophthalmic lens with locally variable index of refraction and me

1976-06-09

1978-02-14

Bashore, S. Leon

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

65 30E, 65 30R, 65 31, 65 37, 65 38, 65 60D, 65 60R, 65 61, G02B 2710, C03C 1500, C03C 1700, C03C 1900

Patent

active

040735796

ABSTRACT:
Ophthalmic lenses with locally variable indices of refraction produced from microporous glass bodies diffused with inorganic salts and rendered transparent by heat treatment. Local variations in refractive index result from differences in concentrations of the salts produced by controlled diffusion and/or selective leaching after impregnation of the porous bodies.

REFERENCES:
patent: 901659 (1908-10-01), Stevens
patent: 1483509 (1924-02-01), Bugbee
patent: 1630724 (1927-05-01), Tillyer
patent: 1865691 (1932-07-01), Hill
patent: 2336227 (1943-12-01), Dalton
patent: 2355746 (1944-08-01), Nurdberg et al.
patent: 3486808 (1969-12-01), Hamblen
patent: 3542535 (1970-11-01), Hensler et al.
patent: 3650598 (1972-03-01), Kitano et al.
patent: 3802761 (1974-04-01), Giallorenzi et al.
patent: 3857689 (1974-12-01), Koizumi et al.
patent: 3938974 (1976-02-01), Macedo et al.

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