Patents by Inventor Robert C. Wetzel

Robert C. Wetzel 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).

  • Light emitting diode with multifaceted reflector to increase coupling efficiency and alignment tolerance
    Patent number: 5101454
    Abstract: A light source, such as an LED, is provided with a multifaceted reflector to facilitate coupling of emitted light into an optical waveguide such as an optical fiber. In a preferred embodiment, a conventional LED fabricated on one side of a transparent substrate is provided with a series of integral concentric reflecting rings on the opposite side of the substrate. The rings reflect light diverging from the LED toward the central axis of an optical fiber light.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: March 31, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Greg E. Blonder, Robert S. Freund, Roderick K. Watts, Robert C. Wetzel