Patents by Inventor Howard I. McDevitt, Jr.

Howard I. McDevitt, Jr. 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).

  • Apparatus and method for measuring refractive properties of a sphero-cylindrical optical system
    Patent number: 4007990
    Abstract: Apparatus and method is disclosed for measuring refractive properties such as spherical power, cylindrical power, cylindrical axis, etc., which are potentially present in a sphero-cylindrical optical system. Relative movement is effected between an incident light beam and the optical system under test so as to cause the incident beam to effectively move about a pre-defined first locus in the plane of the optical system thereby producing a refracted light beam which moves correspondingly about a second locus in a subsequent plane parallel to the plane of the optical system.
    Type: Grant
    Filed: May 23, 1975
    Date of Patent: February 15, 1977
    Assignee: Acuity Systems, Incorporated
    Inventors: Howard I. McDevitt, Jr., Ronald F. Bax, Richard H. Body