Patents by Inventor Gordon Henshall

Gordon Henshall 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).

  • Dimensionally stable device construction
    Patent number: 6490385
    Abstract: Distortion compensation of an optical micro-electro-mechanical system (MEMS) device disposed on a substrate surface is effected by measuring degradation of an optical parameter of the device and applying a force to the substrate to reverse the degradation. The compensating force may be provided via a layer of piezo-electric material bonded to the opposite surface of the substrate and to which a control voltage is applied. The device distortion may arise from thermal mismatch effects in a package housing containing the device. Typically, the MEMS device comprises an optical crosspoint switch array.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: December 3, 2002
    Assignee: Nortel Networks Limited
    Inventors: Stephen Rolt, Gordon Henshall
  • DIMENSIONALLY STABLE DEVICE CONSTRUCTION
    Publication number: 20020176655
    Abstract: Distortion compensation of an optical micro-electro-mechanical system (MEMS) device disposed on a substrate surface is effected by measuring degradation of an optical parameter of the device and applying a force to the substrate to reverse the degradation. The compensating force may be provided via a layer of piezo-electric material bonded to the opposite surface of the substrate and to which a control voltage is applied. The device distortion may arise from thermal mismatch effects in a package housing containing the device. Typically, the MEMS device comprises an optical crosspoint switch array.
    Type: Application
    Filed: May 24, 2001
    Publication date: November 28, 2002
    Inventors: Stephen Rolt, Gordon Henshall