Patents by Inventor Clinton E. Utter

Clinton E. Utter 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).

  • Patent number: 5493123
    Abstract: System and method are disclosed for inspecting objects, such as sheets of flat panel glass, to detect flaws or contamination at a surface. The surface to be inspected is illuminated with 253.7 nm ultraviolet (UV) radiation to assure detection of defects only at the front surface subjected to the radiation. UV radiation reaching the front surface is scattered by defects at the front surface, and scattered UV radiation is collected by a UV dark field imaging system and directed by the imaging system to a detecting unit, preferably including a charge coupled device (CCD). The detecting unit senses UV radiation scattered at the surface due to defects within a selected size range and provides an output to a processing unit providing an output indicative of the defects sensed within the selected size range.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: February 20, 1996
    Assignee: Particle Measuring Systems, Inc.
    Inventors: Robert G. Knollenberg, Vaughn C. Hoxie, Clinton E. Utter