Patents by Inventor Chris C. Bowman

Chris C. Bowman 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).

  • High contrast flatness interferometer
    Patent number: 4406543
    Abstract: Disclosed is an interferometer having an optical flat having a coated reference surface of aluminum whose thickness is in the range of 100-500 A (preferably about 300 A) covered with a coating of silicon dioxide of a thickness in the range of 1,000-10,000 A (preferably about 3,000 A). Such a coating on an optical flat when in engagement with a surface of an object to be tested greatly enhances the contrast of the interference fringes.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: September 27, 1983
    Assignee: Burroughs Corporation
    Inventors: Michael H. Nemiroff, Chris C. Bowman