Patents by Inventor Robert A. Spande

Robert A. Spande 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).

  • 60 degree field of view eyepiece
    Patent number: 5847880
    Abstract: An optical eyepiece assembly for providing a sixty degree field of view cbility to an image intensifier. The assembly includes first and second air-spaced lens doublets, a first lens, filter element, and second lens.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: December 8, 1998
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Robert A. Spande
  • Afocal objective lens
    Patent number: 5214532
    Abstract: An accessory lens for a far-infrared thermal imager which is quickly insted or removed to double the range. The accessory uses two or three element with alternating dielectric constants and combinations of spherical and aspherical surfaces.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: May 25, 1993
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John M. Hall, Robert A. Spande