Patents by Inventor H. Laurance Marshall

H. Laurance Marshall 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).

  • Variable frequency short cavity dye laser
    Patent number: 4751712
    Abstract: A dye laser system especially useful for generating short pulses in response to excitation laser pulses directed to an appropriate dye contained between opposing mirrors that form a short cavity within a small, easily replaceable cell. The spacing of the mirrors is adjustable by application of a force from outside of the cell, thereby allowing control of the frequency of the laser output. The cell is self-contained, including a dye reservoir maintained in continuous liquid communication with the cavity for providing fresh dye to it.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: June 14, 1988
    Assignee: Quantel International
    Inventors: Paul H. Pax, Pay H. Chiu, H. Laurance Marshall, James Henden
  • Laser beam control device
    Patent number: 3931593
    Abstract: A shutter and beam expander for diverting the output of a high power laser into an absorption body comprises a onepiece metallic structure having a convex spherically shaped portion adapted to be moved into the beam path for simultaneously reflecting and expanding the beam into energy absorption material.
    Type: Grant
    Filed: April 22, 1974
    Date of Patent: January 6, 1976
    Assignee: GTE Sylvania Incorporated
    Inventor: H. Laurance Marshall