Glasses with color-switchable, multi-layered lenses

Details Glasses with color-switchable, multi-layered lenses Glasses with color-switchable, multi-layered lenses

1991-11-12

1993-02-02

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Combined

351 41, 351 44, G02C 710

Patent

active

051841568

ABSTRACT:
Glasses with multilayered, color-switchable lenses (102) and (104) for blocking harmful radiation include a rim (100) connected to temples (108) and (110). The rim contains a photosensor (116), a color-changing switch (118), a dry-cell power source (120), solar cells (121) and (123), an electronic driver unit (122), and an electronic circuit (124). The color-switchable lenses comprise glass plates (126a), (126b), and (126c), conductive layers (136a), (136c) (142a), and (142b), color polarizers (138a) and (136c), alignment layers (140a), (140c), (146), and (148), a neutral polarizer (144), and liquid-crystal layers (158) and (160). When the photosensor determines that the intensity of incident radiation falls above or below the specified threshold, an amplified signal is sent via the circuit to the electronic driver unit which supplies layers 158 and 160 with voltages which cause the color-switchable lenses to change their spectral transmittance characteristics.

REFERENCES:
patent: 3785721 (1974-01-01), Harsch
patent: 4039254 (1977-08-01), Harsch
patent: 4068926 (1978-01-01), Nakamura et al.
patent: 4232948 (1980-11-01), Shanks
patent: 4416514 (1983-11-01), Plummer
patent: 4697884 (1987-10-01), Amstutz et al.
patent: 4917465 (1990-04-01), Conner et al.

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