Patents Assigned to WeiFour, Inc.
  • Rapid acquisition ellipsometry
    Patent number: 7796259
    Abstract: Disclosed embodiments pertain to optical assemblies which impart a spatially dependent rotation to linearly polarized light. A pair of optical assemblies may be used to apply a spatially dependent rotation to linearly polarized light in the region between the optical assemblies, and produce a spatially independent rotation after traversing the second optical assembly. A pair of optical assemblies may be used in combination with a wave plate to allow a determination of the Stokes parameters of an elliptically polarized beam of light.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: September 14, 2010
    Assignee: WeiFour, Inc.
    Inventors: Anlun Tang, Yingwu Lian, Jonglip Choi