Patents by Inventor John Dwight Garman

John Dwight Garman 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).

  • Cryogenically cooled adjustable apertures for infrared cameras
    Patent number: 7157706
    Abstract: A continuously variable diaphragm or swappable fixed aperture for use in thermal infrared cameras, which aperture or diaphragm can be cooled to cryogenic temperatures. The invention contemplates mounting aperture control means, if necessary, in a vacuum or extending the control mechanism through a vacuum in a thermally isolated manner to avoid radiation load on the photocell. The inventive method implements such a diaphragm and control system. The invention makes possible the object of using a single thermal infrared camera under a wide variety of target-scene radiation conditions that may be rapidly changing, with interchangeable or zoom camera lenses requiring matching or different size cold stops, and under other such dynamic situations.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: January 2, 2007
    Assignee: Opto-Knowledge Systems, Inc.
    Inventors: Nahum Gat, John Dwight Garman
  • METHOD AND APPARATUS FOR USING TEMPERATURE CONTROLLED VARIABLE DIAPHRAGMS OR SWAPPABLE FIXED APERTURES WITH INFRARED CAMERAS
    Publication number: 20040238741
    Abstract: A continuously variable diaphragm or swappable fixed aperture for use in thermal infrared cameras, which aperture or diaphragm can be cooled to cryogenic temperatures. The invention contemplates mounting aperture control means, if necessary, in a vacuum or extending the control mechanism through a vacuum in a thermally isolated manner to avoid radiation load on the photocell. The inventive method implements such a diaphragm and control system. The invention makes possible the object of using a single thermal infrared camera under a wide variety of target-scene radiation conditions that may be rapidly changing, with interchangeable or zoom camera lenses requiring matching or different size cold stops, and under other such dynamic situations.
    Type: Application
    Filed: May 28, 2003
    Publication date: December 2, 2004
    Applicant: OPTO-KNOWLEDGE SYSTEMS, INC.
    Inventors: Nahum Gat, John Dwight Garman