Patents by Inventor Weichao DU

Weichao 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).

  • Method and device for measuring large-area and massive scattered field in nanoscale
    Patent number: 9785047
    Abstract: A device for measuring a large-area and massive scattered field in nanoscale. The device includes a polarization state generator disposed on an output optical path of a laser source, a polarization state analyzer operating to demodulate a polarized light beam emitted thereon, a first objective lens and a first lens disposed on an optical path of a sample stage, and a scanning mirror disposed on an optical path in front of or at the rear of the polarization state generator.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: October 10, 2017
    Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Shiyuan Liu, Weichao Du, Chuanwei Zhang, Yinyin Tan
  • METHOD AND DEVICE FOR MEASURING LARGE-AREA AND MASSIVE SCATTERED FIELD IN NANOSCALE
    Publication number: 20160187248
    Abstract: A device for measuring a large-area and massive scattered field in nanoscale. The device includes a polarization state generator disposed on an output optical path of a laser source, a polarization state analyzer operating to demodulate a polarized light beam emitted thereon, a first objective lens and a first lens disposed on an optical path of a sample stage, and a scanning mirror disposed on an optical path in front of or at the rear of the polarization state generator.
    Type: Application
    Filed: June 30, 2015
    Publication date: June 30, 2016
    Inventors: Shiyuan LIU, Weichao DU, Chuanwei ZHANG, Yinyin TAN
  • Alignment method for optical axes of composite waveplate
    Patent number: 9103667
    Abstract: An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: August 11, 2015
    Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Shiyuan Liu, Honggang Gu, Xiuguo Chen, Chuanwei Zhang, Weiqi Li, Weichao Du
  • ALIGNMENT METHOD FOR OPTICAL AXES OF COMPOSITE WAVEPLATE
    Publication number: 20150029507
    Abstract: An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values.
    Type: Application
    Filed: July 25, 2014
    Publication date: January 29, 2015
    Inventors: Shiyuan LIU, Honggang GU, Xiuguo CHEN, Chuanwei ZHANG, Weiqi LI, Weichao DU