Patents by Inventor William J. Chervenak

William J. Chervenak 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).

  • Optical waveguide preform measurement during manufacture
    Patent number: 5558692
    Abstract: An apparatus and method for measuring preform diameter and runout during manufacture of the preform. A Keyence LB1201 displacement gauge is used to determine distance between a sensing unit and the surface of an optical waveguide preform. It was found that the gauge produced an alternating signal imposed on a constant signal. By dividing the signal into its constant and alternating components, preform diameter and runout can be measured. A water cooled band pass filter and housing are used to protect the sensing unit.The preform surface can be mapped using a pair of sensing units, capable of moving parallel to the preform axis of rotation, located in diametric opposition about the preform.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: September 24, 1996
    Assignee: Corning Incorporated
    Inventors: William J. Chervenak, Robert S. Wagner