Patents by Inventor Roger Lever

Roger Lever 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).

  • Liquid crystal optical switch with burnt-in control
    Patent number: 7136548
    Abstract: The invention concerns a switch for optical beams comprising a series of optical input channels (110 . . . 150) and a series of optical output channels (410 . . . 450), two liquid crystal cells respectively adapted to deflect an optical beam coming out of an input channel (110 . . . 150) or arriving onto an output channel (410 . . . 450), said two cells comprising each a series of electrodes adapted to orient liquid crystals when one such electrode is subjected to a supply voltage said electrodes being distributed in zones (210 . . . 250, 310 . . . 350), each zone corresponding to a single input channel (110 . . . 150) or a single output channel (410 . . . 450), the switch further comprising means for supplying the electrodes with selected voltages. The invention is characterised in that it comprises a series of separate electronic circuits, each being connected to at least a different zone (210 . . .
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: November 14, 2006
    Assignee: France Telecom
    Inventors: Bruno Vinouze, Nicole Wolffer, Roger Lever, Philippe Gravey
  • Liquid crystal optical switch with bumt-in control
    Publication number: 20050018954
    Abstract: The invention concerns a switch for optical beams comprising a series of optical input channels (110 . . . 150) and a series of optical output channels (410 . . . 450), two liquid crystal cells respectively adapted to deflect an optical beam coming out of an input channel (110 . . . 150) or arriving onto an output channel (410 . . . 450), said two cells comprising each a series of electrodes adapted to orient liquid crystals when one such electrode is subjected to a supply voltage said electrodes being distributed in zones (210 . . . 250, 310 . . . 350), each zone corresponding to a single input channel (110 . . . 150) or a single output channel (410 . . . 450), the switch further comprising means for supplying the electrodes with selected voltages. The invention is characterised in that it comprises a series of separate electronic circuits, each being connected to at least a different zone (210 . . .
    Type: Application
    Filed: June 15, 2001
    Publication date: January 27, 2005
    Inventors: Bruno Vinouze, Nicole Wolffer, Roger Lever, Philippe Gravey