Patents by Inventor Jeffrey B Parker

Jeffrey B Parker 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).

  • Covered photomask holder and method of using the same
    Patent number: 6736386
    Abstract: A covered photomask holder and a method of using the covered photomask holder are disclosed. A photomask holder includes a gripping mechanism to engage and retain a component with the photomask holder. A handle is coupled to the gripping mechanism that manipulates the gripping mechanism. A protective cover is associated with the gripping mechanism that encloses the component while engaged within the photomask holder.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: May 18, 2004
    Assignee: DuPont Photomasks, Inc.
    Inventor: Jeffrey B. Parker
  • Method and system for inspecting a low gloss surface of an object at a vision station
    Patent number: 6239436
    Abstract: A method and system are provided for inspecting a low gloss surface (12) of an object (14) at a vision station utilizing a regular, extended pattern of infrared radiation. The system includes an infrared radiation source (10) and an infrared image converter and/or infrared cameras (16) to automatically locate a surface defect in the object. A signal processor processes a first set of electrical signals from the infrared cameras to obtain a second set of electrical signals which represent pattern distortions in the reflected infrared radiation signal caused by the surface defect in order to locate the surface defect in the object. The second set of electrical signals may be processed to classify the surface defect in the object as being an “in-dent” or an “out-dent”.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: May 29, 2001
    Assignee: Perceptron, Inc.
    Inventors: Jeffrey B Parker, Myron Czubko, Neil Haven
  • Machine vision surface characterization system
    Patent number: 5078496
    Abstract: This invention is a surface inspection system including a light source having a sharp edge between dark and bright and a video camera imaging this edge reflected from the surface. The light intensity of the light source is controlled using a light intensity sensor. An optical system focusses an image of the light source at the video camera with sufficient depth of focus to include the surface to be inspected. The exposure duration is set to prevent blurring if the surface to be inspected is moving. A surface quality computation apparatus computes at least one measure of surface quality, such as gloss, distinctness of reflected image and orange peel of the surface, from the video image signal. This surface quality computation apparatus preferably includes a frame grabber and a general purpose digital computer. Gloss is computed by determination of the maximum and minimum brightness slopes of the video image signal of the edge.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: January 7, 1992
    Assignee: Autospect, Inc.
    Inventors: Jeffrey B. Parker, Brian J. Czubko