Patents by Inventor Lloyd Quackenbos

Lloyd Quackenbos 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).

  • High sensitivity optical inspection system and method for detecting flaws on a diffractive surface
    Patent number: 6603542
    Abstract: An improved high sensitivity optical inspection system for detecting flaws on a diffractive surface containing surface patterns includes: a first and a second illumination means for illuminating predetermined regions on the diffractive surface to generate a scattered intensity distribution in response to either a flaw or a surface pattern; means for detecting the intensity level of the scattered intensity distribution at a plurality of locations about the diffractive surface; means for establishing a minimum detected intensity level; means, responsive to the minimum detected intensity level, for indicating the absence of a flaw on the illuminated region of the diffractive surface when the minimum detected intensity level is below a threshold intensity level and for indicating the presence of a flaw on the illuminated region of the diffractive surface when the minimum detected intensity level exceeds the threshold intensity level; and means for moving the diffractive surface to generate a scan pattern on the d
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: August 5, 2003
    Assignee: QC Optics, Inc.
    Inventors: Eric Chase, Jay Ormsby, Abdu Boudour, Sergey Broude, Lloyd Quackenbos