Patents by Inventor John A. VanHoogstrate

John A. VanHoogstrate 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).

  • Visual display system for producing a continuous virtual image
    Patent number: 6152739
    Abstract: A visual display system for producing a continuous far-focused virtual image according to the present invention includes a number of adjacent video image generation and display modules. Each module includes an image generator that generates a video image representative of a portion of a composite display image displayed on a video display. The visual display system also includes a number of optical viewing lenses associated with each video image generation and display modules and positioned between the operator and the video display. The lenses restrict the operator's field of view such that the operator views only a portion of the active display area of the video displays. The lenses of adjacent modules are joined together along their edges to form an enclosure partially surrounding the operator so that the operator views the composite display image displayed on the video displays through the lenses and perceives the composite display image as a continuous far-focused virtual image.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: November 28, 2000
    Assignee: McDonnell Douglas Corporation
    Inventors: John G. Amery, John A. VanHoogstrate, Michael E. Stockton
  • Schlieren color television image aperturing device
    Patent number: 4931859
    Abstract: A Schlieren-type color television projector utilizes a fiber optic rear projection screen (FORPS) at an initial focal point to translate the spatially separated, converging rays of component colors produced by the Schlieren-type color television projector into a plurality of spatially combined, diverging rays of combined colors which are then suitable for further processing by a conventional optical lens system which can either aperture or vignette the image without color fringing, separation, or a shift in the color balance normally experienced when aperturing or vignetting a Schlieren-type color television image.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: June 5, 1990
    Assignee: McDonnell Douglas Corporation
    Inventors: Homer E. Dillard, John A. VanHoogstrate, Ronald J. Muffler
  • Schlieren color television image aperturing device
    Patent number: 4814866
    Abstract: A Schlieren-type color television projector utilizes a fiber optic rear projection screen (FORPUS) at an initial focal point to translate the spatially separated, converging rays of component colors produced by the Schlieren-type color television projector into a plurality of spatially combined, diverging rays of combined colors which are then suitable for further processing by a conventional optical lens system which can either aperture or vignette the image without color fringing, separation, or a shift in the color balance normally experienced when aperturing or vignetting a Schlieren-type color television image.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: March 21, 1989
    Assignee: McDonnell Douglas Corporation
    Inventors: Homer E. Dillard, John A. VanHoogstrate, Ronald J. Muffler