Patents by Inventor Yingchun Ding

Yingchun Ding 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).

  • Frequency splitting laser micrometer
    Patent number: 7106451
    Abstract: A frequency splitting laser micrometer for measuring a displacement of an object. The laser micrometer includes a frequency splitting laser directing a first frequency splitting laser beam to the object via a laser output mirror at one end of the laser. The first laser beam is reflected thus outputting a second frequency splitting laser beam, such that a feedback cavity is created, wherein a frequency of the second laser beam is decided by a cavity length of said feedback cavity and accordingly the displacement of the object. A detecting and signal processing unit receives said first and second frequency splitting laser beams and measures the displacement of the object according to interference effects of said first and second laser beams.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: September 12, 2006
    Assignee: Tsinghua University
    Inventors: Shulian Zhang, Yan Li, Yingchun Ding, Jun Zhu
  • Frequency splitting laser micrometer
    Publication number: 20030231319
    Abstract: A frequency splitting laser micrometer for measuring a displacement of an object is disclosed.
    Type: Application
    Filed: May 27, 2003
    Publication date: December 18, 2003
    Inventors: Shulian Zhang, Yan Li, Yingchun Ding, Jun Zhu