Patents by Inventor Larry C. Walrath

Larry C. Walrath 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: 5756989
    Abstract: Color night vision goggles (NVG), e.g., binocular-style or monocular-style NVG, which include at least one channel. Each channel includes an objective lens for receiving input radiant energy from a low-luminance scene within the field-of-view of the NVG, an input tunable electro-optical filter positioned in front of the objective lens, an image intensifier device for amplifying input radiant energy transmitted by the input electro-optical filter and the objective lens, and for generating output radiant energy which constitutes an amplified image of the low-luminance scene, an eyepiece lens, an output tunable electro-optical filter disposed between the image intensifier device and the eyepiece lens, and a control circuit for generating a control signal having a prescribed frequency. The input and output electro-optical filters sequentially and synchronously transmit successive ones of a plurality of different spectral bands (e.g.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: May 26, 1998
    Assignee: McDonnell Douglas Corporation
    Inventors: Philip D. Bear, Larry C. Walrath