Patents by Inventor Keming Du

Keming Du 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).

  • Laser
    Patent number: 5148443
    Abstract: A laser has a beam path multiply folded by two resonator end mirrors and at east one reflector retroreflectively folding the laser beam. The laser axis is parallel displaced to the axis of a further reflector. In order to improve the laser beam quality while retaining its comparatively low adjustment sensitivity, the beam path is folded at least twice with the retroreflective reflector.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: September 15, 1992
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.
    Inventors: Keming Du, Peter Loosen, Gerd Herziger