Multifocal ophthalmic lens

Details Multifocal ophthalmic lens Multifocal ophthalmic lens

1978-03-13

1981-11-17

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 41, 351158, 351159, 350331R, A61B 314, G02C 100, G02C 702, G02F 113

Patent

active

043008186

ABSTRACT:
The specification discloses a multifocal ophthalmic lens to provide a variable focusing power lens for near and farsighted corrected vision. The lens includes a first and second lens element. First and second electrodes are disposed between the lens elements, and a film of liquid crystal is disposed between the electrodes. A voltage supply source is provided for applying a voltage to the electrodes to vary the index presented by the liquid crystal film to thereby provide a variation in the index of refraction and focal length of the lens elements. Circuitry is provided for varying the voltage applied to the electrodes to determine the focusing power of the lens.

REFERENCES:
patent: 3309162 (1967-03-01), Kosanke et al.
patent: 3379885 (1968-04-01), Nork
patent: 3424513 (1969-01-01), Lotspeich
patent: 3473868 (1972-09-01), Young et al.
patent: 3525565 (1970-08-01), O'Neill et al.
patent: 3533683 (1971-11-01), Stark et al.
patent: 3533684 (1970-10-01), Stark et al.
patent: 3551026 (1970-12-01), Heilmeier
patent: 3583794 (1971-04-01), Newman et al.
patent: 3598479 (1971-08-01), Wright
patent: 3614215 (1971-10-01), Mackta
patent: 3623799 (1971-11-01), Millodot
patent: 3641354 (1972-02-01), De Ment
patent: 3679295 (1972-07-01), Newman et al.
patent: 3689135 (1972-09-01), Young et al.
patent: 3803408 (1974-04-01), Assouline et al.
patent: 3857629 (1974-12-01), Freiser
patent: 3877798 (1974-04-01), Tolar et al.
patent: 3930715 (1976-01-01), Brumlik
patent: 3951527 (1976-04-01), Blanz
patent: 3961181 (1976-06-01), Golden
patent: 3984156 (1974-09-01), Jernigan
patent: 4037929 (1977-07-01), Bricot
patent: 4039254 (1976-05-01), Harsch
patent: 4059348 (1977-11-01), Jernigan
patent: 4078856 (1978-03-01), Thompson et al.
patent: 4181408 (1980-01-01), Senders
patent: 4190330 (1980-02-01), Berreman

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