Patents by Inventor Ralph Bettman

Ralph Bettman 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).

  • Thermally tuned filter having a pre-stressed membrane
    Publication number: 20060028705
    Abstract: A thermally tuned filter comprising an optical tuning device and a pre-stressed membrane positioned on the optical tuning device. A tensile prestress of the pre-stressed membrane to increase a natural frequency of the thermally tuned filter.
    Type: Application
    Filed: October 11, 2005
    Publication date: February 9, 2006
    Inventors: Wenhua Ling, Marc Finot, Ralph Bettman
  • THERMALLY TUNED FILTER HAVING A PRE-STRESSED MEMBRANE
    Publication number: 20050225823
    Abstract: A thermally tuned filter having a pre-stressed membrane. The thermally tuned filter includes a handle layer, a dielectric layer positioned proximate to the handle layer, and a device layer positioned proximate to the handle layer. The device layer includes an optical device. A pre-stressed membrane is positioned proximate to the device layer; a tensile prestress of the pre-stressed membrane increases the natural frequency of the thermally tuned filter.
    Type: Application
    Filed: March 31, 2004
    Publication date: October 13, 2005
    Inventors: Wenhua Ling, Marc Finot, Ralph Bettman