Patents by Inventor Richard A. Eggleston

Richard A. Eggleston 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).

  • Optical modulators
    Patent number: 4884044
    Abstract: An optical modulator comprises a crystal (15) of material exhibiting the pyroelectric effect, and charge-dissipating means for dissipating any charge built up on the optical faces of the prism. The charge-dissipating means may comprise point electrodes (30) positioned adjacent to the optical faces (21) of the crystal and connected to an alternating-current high-voltage power supply (31). The electrodes produce charged ions which neutralize any charge on the optical faces of the crystal. The crystal may be used as the Q-switch in a laser.
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: November 28, 1989
    Assignee: Ferranti International Signal plc
    Inventors: Peter J. Heywood, Richard A. Eggleston
  • Optical modulators
    Patent number: RE35240
    Abstract: An optical modulator comprises a crystal (15) of material exhibiting the pyroelectric effect, and charge-dissipating means for dissipating any charge built up on the optical faces of the prism. The charge-dissipating means may comprise point electrodes (30) positioned adjacent to the optical faces (21) of the crystal and connected to an alternating-current high-voltage power supply (31). The electrodes produce charged ions which neutralize any charge on the optical faces of the crystal. The crystal may be used as the Q-switch in a laser.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: May 14, 1996
    Assignee: GEC-Marconi Avionics (Holdings) Limited
    Inventors: Peter J. Heywood, Richard A. Eggleston