Optical lens structure and control system for maintaining a sele

Details Optical lens structure and control system for maintaining a sele Optical lens structure and control system for maintaining a sele

1996-01-11

1997-08-05

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With antiglare or shading

351 41, 351158, G02C 712, G02C 100

Patent

active

056547862

ABSTRACT:
A lens structure and electronic control system is provided for use in eyeglasses. The lens structure is formed by a pair of lenses with a transmission layer formed by an electro-optic material is disposed therebetween. The transmission layer is used to control the amount of light that is transmitted through the lens structure by placement of a variable voltage placed across it. The transmission layer can be formed by either a dichroic dye or by a ferro-electric material such as PLZT. The electronic control system uses a photoamperic sensor placed behind the lens structure to develop a current proportional to the transmitted light. The current is converted into a voltage which is compared to a desired transmission range. If the sensed transmission level is outside the desired range the control circuit causes a power supply to add or decrease the charge across the lens as necessary to bring the transmitted light level back into the desired range. The use of a ferro-electric material also requires the use of a high voltage power supply to provide the necessary voltages to operate the lens structure.

REFERENCES:
patent: 3245315 (1966-04-01), Marks et al.
patent: 3531182 (1970-09-01), Land et al.
patent: 3663088 (1972-05-01), Maldonado et al.
patent: 4201450 (1980-05-01), Trapani
patent: 4264154 (1981-04-01), Petersen
patent: 4529873 (1985-07-01), Ballmer et al.
patent: 4572619 (1986-02-01), Reininger et al.
patent: 4968127 (1990-11-01), Russell et al.
patent: 5015086 (1991-05-01), Okaue et al.

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