Patents by Inventor Zhou Xiaoqun

Zhou Xiaoqun 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).

  • Single aspherical lens for de-astigmatism, collimation, and circulation of laser beams
    Patent number: 6195208
    Abstract: An astigmatic and non-circular diverging input laser beam is converted into a collimated and circular output laser beam with its astigmatism corrected using a single aspherical lens. The input surface has a concave aspherical profile in the transverse direction and a convex aspherical profile in the longitudinal direction respectively for astigmatism correction. The output surface has a convex aspherical profile in the transverse direction and a non-curved profile in the longitudinal direction respectively for collimation and circularization of the final output laser beam.
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: February 27, 2001
    Inventors: Bryan Kok Ann Ngoi, Zhou Xiaoqun, Koh Soon Seong