Patents by Inventor Ido Bar-Tana

Ido Bar-Tana has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5917568
    Abstract: An optically addressed, optical relaying device placed between crossed polarizers utilizes an array of pixels made up of photodetectors, circuitry, and modulating pads, and an analog liquid crystal to modulate the intensity of an optical signal on a pixel by pixel basis. The photodetector generates a current proportional to the light detected. Once the current exceeds a certain level, the circuitry stores a charge on the modulating pad proportional to the photo-induced current. This stored charge rotates the molecules of the liquid crystal thereby rotating the polarization of the light signal. The output polarizer then attenuates the light beam according to the change in polarization.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: June 29, 1999
    Assignee: The Regents of the University of Colorado
    Inventors: Kristina Mary Johnson, Ido Bar-Tana, Douglas John McKnight