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US 4,066,335 AGranted
Variable density lens
AssigneeXerox Corporation
InventorsJohn E. Courtney, Charles J. Urso, Gary A. Dir
Life of this patent
Estimating the term…
Abstract
A lens is fabricated with a layer of liquid crystalline material between electrodes, wherein the liquid crystalline composition is capable of altering the state of polarization of light when a voltage is applied between the electrodes. A linear polarizer and an analyzer are used in conjunction with the lens, and optionally are incorporated into the lens.
Claims3
A variable density, split-Dagor lens, comprising a positive crown, a negative flint, a positive meniscus and an electro-optic cell laminated thereto;
- said electro-optic cell comprising in sandwich configuration a linear polarizer, a layer of conductive material, a liquid crystalline composition capable of altering the state of polarization of light when a voltage is applied thereacross, another layer of conductive material, and an analyzer.
Dependencies are inferred from the claim text.