Variable light transmission ophthalmic device

Details Variable light transmission ophthalmic device Variable light transmission ophthalmic device

1976-07-01

1978-07-11

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With moisture prevention or absorption

351 49, 350165, 350 66, G02C 712, G02B 110, G02B 1104

Patent

active

040998584

ABSTRACT:
An ophthalmic device comprising superposed pairs of light polarizing elements, one pair of such elements being fixed and the other pair being rotatable with respect to the fixed pair to provide a variable light transmission feature, both immediately adjacent surfaces of the superposed elements comprising a continuous coating of a hydrophobic material.

REFERENCES:
patent: 1562350 (1925-11-01), Luckey
patent: 2251330 (1941-08-01), Fairbank
patent: 3622218 (1971-11-01), Kruger

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