Patents by Inventor Albert P. Simpson

Albert P. Simpson 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).

  • Holographic optical element providing an artificial star for an optical system
    Patent number: 5506702
    Abstract: An artificial star is disclosed for use with an optical system (10) that has at least one optical axis (14a). The optical system includes an entrance aperture (14) through which the at least one optical axis passes and a radiation detector (22) having a radiation receiving surface. The optical system also includes an optical train having at least one optical element (16, 18, 20). The at least one optical train is disposed for receiving radiation from the entrance aperture, for directing the received radiation along the at least one optical axis, and for focussing the received radiation onto the radiation receiving surface of the radiation detector.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: April 9, 1996
    Assignee: Northrop Grumman Corporation
    Inventor: Albert P. Simpson