Patents by Inventor Frederick Hartemann

Frederick Hartemann 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).

  • Cerenkov electrooptic shutter
    Patent number: 4835391
    Abstract: A system which couples Cerenkov emission with a gated electrooptic effect to allow viewing of Cerenkov radiation in sub nanosecond time-scales is disclosed. Cerenkov radiation is generated by transmitting an electron beam through a transparent medium with a high index of refraction. The Cerenkov radiation is then gated into a sample pulse of subanosecond duration by an electrooptic crystal which has an index of refraction controlled by an electric field. the electrooptic crystal is opaque to the Cerenkov radiation until receiving a 6.0 kV voltage for about 750 picoseconds, upon which a pulsed sample of Cerenkov radiation is transmitted to a display system.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: May 30, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Frederick Hartemann, George Bekefi