Patents by Inventor John F. Beckwith

John F. Beckwith 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).

  • Heterodyne interferometer with angstrom-level periodic nonlinearity
    Patent number: 6847455
    Abstract: Displacement measuring interferometer systems and methods are disclosed. One or more acousto-optic modulators for receiving a laser light beam from a laser light source can be utilized to split the laser light beam into two or more laser light beams, while spatially separating frequencies thereof. One or more reflective mechanisms can be utilized to reflect one or more of the laser light beams back to the acousto-optic modulator. Interference of two or more of the laser light beams generally at the acousto-optic modulator can provide an interfered laser light beam thereof. A detector for receiving the interfered laser light beam can be utilized to provide interferometer measurement data.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: January 25, 2005
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Tony L. Schmitz, John F. Beckwith