Patents by Inventor Neil Hochgraf

Neil Hochgraf 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: 4978860
    Abstract: An optical system for a bar code scanner has a working range that is not determined by the lens aperture, but by the dimension and orientation of the detector. In the preferred embodiment, the desired working range is imaged onto a detector array using a modified Scheimpflug arrangement. The array in the first Scheimpflug plane with respect to the lens defines a second Scheimpflug plane that intersects the bar code tag to be read. So long as the bar code tag intersects the image of the detector array in the second Scheimpflug plane, a portion of the image of the bar code tag will be in focus on at least one of the elements of the detector array. The lens aperture can be as large as desired to maximize resolution and minimize illumination needs without adversely affecting the working range. The scanner's bar code illumination can be directed along the second Scheimpflug plane, which is off the optical axis of the lens.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: December 18, 1990
    Assignee: Hewlett-Packard Company
    Inventors: Brian J. Bayley, Michael J. Brosnan, Neil Hochgraf