Patents by Inventor Frederick R. Fluhr

Frederick R. Fluhr 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).

  • Unstable resonator laser system
    Patent number: 4096447
    Abstract: Optical radiation reflective surfaces for use in an unstable resonator laser system in which the output beam of the system does not contain an aperture in the middle of the beam thereby avoiding the requirement of a collimation lens system to obtain a beam of minimum divergence. The system provides an output beam which does not have a central hole.
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: June 20, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Frederick R. Fluhr
  • Aspheric cassegrain laser power amplifier system
    Patent number: 3942127
    Abstract: An optical power amplifier system for extracting high power radiation from a basic active laser media. The system includes a plurality of basically confocal mirrors so positioned that radiation output from a laser is amplified, that no power is absorbed in the supporting structure and it has no feedback from the secondary mirror. In the system, the laser beam passes through the active laser media region at least four times which increases the output power.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: March 2, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Frederick R. Fluhr, Stephen T. Hanley, R. Bernard Brown