Patents by Inventor Stefan Beiergroesslein

Stefan Beiergroesslein 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 elements having image-forming, color- and polarization-selective reflection and containing cholesteric liquid crystals, and the preparation and use of these elements
    Patent number: 5682212
    Abstract: The invention relates to optical elements having image-forming, color- and polarization-selective reflection and containing cholesteric liquid crystals, and to the preparation and use of these elements. In the wavelength- and polarization-selective elements which form an optical image, at least one cholesteric liquid crystal is enclosed in the cavity of constant thickness between two light-transmitting substrates having curved surfaces in such a way that the helix axis of the liquid crystal is aligned perpendicular to the curved surface of the light-transmitting substrates. The elements are suitable for use as beam splitters or recombiners in projection displays.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: October 28, 1997
    Assignee: Consortium fur elektrochemische Industrie GmbH
    Inventors: Robert Maurer, Stefan Beiergroesslein, Franz-Heinrich Kreuzer