Patents by Inventor John E. Greivenkamp

John E. Greivenkamp 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 to obtain clinical ophthalmic high order optical aberrations
    Patent number: 9655511
    Abstract: An apparatus and method to improve the prescribing of customized ophthalmic corrections which contain higher order aberration. The apparatus enables the subjective measurement of higher order aberrations such as spherical aberration which can be used as part of the prescription for customized ophthalmic corrections.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: May 23, 2017
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Bruce M. Pixton, John E. Greivenkamp, Gregory A. Williby, Russell Spaulding
  • APPARATUS AND METHOD TO OBTAIN CLINICAL OPHTHALMIC HIGH ORDER OPTICAL ABERRATIONS
    Publication number: 20150289759
    Abstract: An apparatus and method to improve the prescribing of customized ophthalmic corrections which contain higher order aberration. The apparatus enables the subjective measurement of higher order aberrations such as spherical aberration which can be used as part of the prescription for customized ophthalmic corrections.
    Type: Application
    Filed: June 25, 2015
    Publication date: October 15, 2015
    Inventors: Bruce M. Pixton, John E. Greivenkamp, Gregory A. Williby, Russell Spaulding
  • Moire distance measurement method and apparatus
    Patent number: 4988886
    Abstract: A Moire distance measurement technique for measuring the distance that a diffusely reflecting surface moves involves projecting a first grating onto the surface, imaging the projected grating onto a second grating to form a Moire pattern, and measuring a change in the Moire pattern as the surfaces move to determine the distance that the surface has moved.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: January 29, 1991
    Assignee: Eastman Kodak Company
    Inventors: Russell J. Palum, John E. Greivenkamp