Patents by Inventor W. Randall Babbitt

W. Randall Babbitt 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).

  • Method and apparatus for measuring distance to a target
    Patent number: 5589928
    Abstract: The invention performs coordinate measurement employing multiple-frequency intensity-modulated laser radar. A laser diode source is intensity modulated by variation of its excitation current. Its output beam is directed to a target using scanning mirrors or other opto-mechanical means, and the light returned from the target is detected. The modulation frequency is alternated between two or more values, creating a dataset of several relative phase measurements that uniquely determine the distance to the target without ambiguity.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: December 31, 1996
    Assignee: The Boeing Company
    Inventors: W. Randall Babbitt, John A. Bell, Barbara A. Capron, Peter J. deGroot, Ronald L. Hagman, John A. McGarvey, William D. Sherman, Paul F. Sjoholm