Programmable liquid crystal wavefront device

Details Programmable liquid crystal wavefront device Programmable liquid crystal wavefront device

1994-12-02

1997-01-14

Powell, Mark R.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

345 98, 345100, 349 31, G02F 113

Patent

active

055945651

ABSTRACT:
A programmable liquid crystal optical wavefront device selectively exhibits characteristics either as a lens or as a beam deflector; the device includes a liquid crystal (LC) control apparatus that is disposed in an LC cell to selectively deflect light beams passing through the LC cell. The LC control apparatus includes a bias electrode network and a bias control circuit electrically coupled to the bias electrode network to provide the appropriate bias voltages across the bias electrodes to determine the operation of the device in the lens mode and in the beam deflector mode. The bias control circuit includes a lens bias resistor circuit, a beam deflector bias resistor circuit, each of which comprise a plurality of respective resistor stages, and a lens/beam deflector switch circuit that selectively couples the resistor circuits to the bias electrode network to cause the device to operate in the lens mode or in the beam deflector mode. The lens/beam deflector switch circuit includes a plurality of thin film switches that are typically disposed on the same substrate with the bias resistors of the two resistor bias circuits.

REFERENCES:
patent: Re33921 (1992-05-01), McLaughlin et al.
patent: 3753609 (1973-08-01), Leibowitz
patent: 3776615 (1973-12-01), Tsukamoto et al.
patent: 3835463 (1974-09-01), Tsukamoto et al.
patent: 4884875 (1989-12-01), Okumura
patent: 4964701 (1990-10-01), Dorschner et al.
patent: 5168382 (1992-12-01), Tsujikawa
patent: 5319492 (1994-06-01), Dorn et al.
A page from Rodenstock RM 600 Laser Stylus catalog.
N. A. Riza et al., "Novel Programmable Nematic Liquid Crystal Lens Devices," Detector Technologies Lab, May 1994.
N. A. Riza et al., "Three-Terminal Adaptive Nematic Liquid-Crystal Lens Device," Optical Society of America, 1994, pp. 1013-1015.
T. Tatebayashi et al., "Electro-Optic Variable Focal-Length Lens Using PLZT Ceramic," Applied Optics, vol. 30, No. 34, Dec. 1, 1991, pp. 5049-5055.

Affiliated with

Also associated with

Rating

Programmable liquid crystal wavefront device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Programmable liquid crystal wavefront device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable liquid crystal wavefront device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1392511