Patents by Inventor Yangjian Xu

Yangjian Xu 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 DISTANCE MEASURING DEVICE
    Publication number: 20130321825
    Abstract: A laser distance measuring device includes a laser module, a receiving lens, and a photoelectric conversion device. The receiving lens includes a first curved surface and a second curved surface having a curvature different from that of the first curved surface. The second curved surface is used to converge part of reflected beams passing through the receiving lens onto a focal plane so as to form a continuous optical band and the continuous optical band gathers on the light receiving surface of the photoelectric conversion device.
    Type: Application
    Filed: May 24, 2013
    Publication date: December 5, 2013
    Applicant: Chervon (HK) Limited
    Inventors: Yangjian Xu, Yunfeng Hu
  • CONTROL AND SWITCH DEVICE FOR INNER LIGHT PATH OF LASER DISTANCE METER
    Publication number: 20130057845
    Abstract: A control and switch device for an inner light path of a meter distance meter includes: a generating device for emitting a polarized light; a liquid crystal box for deflecting the polarized light emitted from the generating device; a transparent medium positioned near the Brewster's angle formed by an emergent light emitted from the liquid crystal box; and a polarizer positioned in the direction of an emergent light emitted from the transparent medium.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 7, 2013
    Applicant: CHERVON (HK) LIMITED
    Inventors: Dezhong Yang, Yangjian Xu