Patents by Inventor Shangquiq Liu

Shangquiq Liu 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).

  • Birefringent grating polarizing beam splitter
    Patent number: 5914811
    Abstract: A birefringence polarizing beam-splitter is provided. A series of periodic blazed grooves or grooves with echelon profile having a number of steps is provided on the surface of an optically birefringent material. The birefringent substrate material may be crystalline or plastic. In another embodiment, two substrates of birefringent material having a series of periodic blazed grooves or grooves with echelon profile are combined to achieve greater angle of beam splitting.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: June 22, 1999
    Assignee: University of Houston
    Inventors: Yansong Chen, Shangquiq Liu, Alex Ignatiev, NaiJuan Wu