Patents by Inventor Clinton Evans

Clinton Evans 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).

  • Optical arrangement for performing null testing of aspheric surfaces including reflective/diffractive optics
    Patent number: 5410408
    Abstract: An improved null optical testing arrangement (22) for null testing aspheric surfaces of optics includes a reflective/diffractive null optical component (24). The reflective/diffractive null optical component (24) provides a reflective/diffractive surface (30) that is easily qualified as a null testing optical arrangement. The reflective/diffractive surface (30) of the null optic (24) generates a reference wavefront which can be completely characterized by measuring the diameters of diffractive rings with an interferometer (42).
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: April 25, 1995
    Assignee: Hughes Aircraft Company
    Inventors: Clinton Evans, Melvin Francis