Patents by Inventor Ralph D. Mayer

Ralph D. Mayer 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: 5367439
    Abstract: A frontal illumination system includes a light source and a finite plurality of reflecting surfaces. The reflecting surfaces can be characterized as the inner surfaces of a set of conical frustums arranged to approximate the illumination coming from the inner surface of a hemisphere. The light source is located within or adjacent to at least one of the reflecting surfaces. It emits light that is reflected off opposing portions of at least one, and preferably all, of the surfaces. The system is capable of illuminating the object from a very large solid angle, even though it is disposed in a substantially short axial space.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: November 22, 1994
    Assignee: Cognex Corporation
    Inventors: Ralph D. Mayer, Len L. Picard, Clifford T. Fitzgerald