Patents by Inventor W. Hudson Wlech

W. Hudson Wlech 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).

  • Achromatic optical system including diffractive optical element, and method of forming same
    Patent number: 5774239
    Abstract: An achromatic optical system that preferably includes a light source for emitting light therefrom, an achromatic optical element positioned to receive light emitted from the light source, and an optical detector positioned to receive and detect light passing through the optical element. The achromatic optical element preferably includes a substrate having opposing sides, a first computer generated hologram positioned on one side of the substrate and adapted to receive light emitted from the light source, and a second computer generated hologram positionally aligned on the opposite side of the substrate and adapted to receive light passing through the substrate from the first hologram at a predetermined location thereon.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 30, 1998
    Assignee: University of North Carolina
    Inventors: Michael R. Feldman, Bob Te Kolste, W. Hudson Wlech, Hedong Yang
  • Achromatic optical system including diffractive optical element
    Patent number: 5606434
    Abstract: An aromatic optical system that preferably includes a light source for emitting light therefrom, an achromatic optical element positioned to receive light emitted from the light source, and an optical detector positioned to receive and detect light passing through the optical element. The achromatic optical element preferably includes a substrate having opposing sides, a first computer generated hologram positioned on one side of the substrate and adapted to receive light emitted from the light source, and a second computer generated hologram positionally aligned on the opposite side of the substrate and adapted to receive light passing through the substrate from the first hologram at a predetermined location thereon.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: February 25, 1997
    Assignee: University of North Carolina
    Inventors: Michael R. Feldman, Bob T. Kolste, W. Hudson Wlech, Hedong Yang