Patents by Inventor Mikhail I. Barnik

Mikhail I. Barnik 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).

  • Polarizer device
    Patent number: 5295009
    Abstract: The polarizer comprises a layer of cholesteric liquid crystal with Grandjean structure disposed in the path of the light and in which the light in a given wavelength range is reflected with selective and circular polarization or is transmitted with reversed direction of rotation, and a mirror which reversed the direction of rotation of the circular-polarized light. The component reflected by the mirror is also transmitted. If the liquid crystal layer is concentric with the source of natural light and the mirror is spherical, the result is a source of circular polarized light. A projection system is obtained by a combination of two of the aforementioned polarizers, one serving as a polarizer and one as an analyzer, and an interposed liquid crystal display cell for modulating the intensity of the polarized light.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: March 15, 1994
    Assignees: Hoffmann-La Roche, Niopic Moscow Research and Production Association
    Inventors: Mikhail I. Barnik, Seraey V. Belyaev, Jurg Funfschilling, Nikolai Malimonenko, Martin Schadt, Klaus Schmitt
  • Polarizer device
    Patent number: 5235443
    Abstract: The polarizer comprises a layer of cholesteric liquid crystal with Grandjean structure disposed in the path of the light and in which the light in a given wavelength range is reflected with selective and circular polarization or is transmitted with reversed direction of rotation, and a mirror which reversed the direction of rotation of the circular- polarized light. The component reflected by the mirror is also transmitted. If the liquid crystal layer is concentric with the source of natural light and the mirror is spherical, the result is a source of circular polarized light. A projection system is obtained by a combination of two of the aforementioned polarizers, one serving as a polarizer and one as an analyzer, and an interposed liquid crystal display cell for modulating the intensity of the polarized light.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: August 10, 1993
    Assignees: Hoffmann-La Roche Inc., NIOPIC Moscow Research and Production Association
    Inventors: Mikhail I. Barnik, Sergey V. Belyaev, Jurg Funfschilling, Nikolai Malimonenko, Martin Schadt, Klaus Schmitt
  • Mesomorphic material with low optical anisotropy and process for producing same
    Patent number: 4490277
    Abstract: A mesomorphic material contains at least one compound "A" ensuring a positive dielectric anisotropy of the material and a compound "B" ensuring a lowered value of optical anisotropy of the material; the content of compound A is within the range of from 4.9 to 30.0% by weight, the content of compound B is within the range of from 70 to 95.1% by weight. The material of the invention has a dielectric anisotropy of from +1 to +10 and the value of optical anisotropy--within the range of from 0.04 to 0.1.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: December 25, 1984
    Inventors: Mikhail F. Grebenkin, Alexandr V. Ivashenko, Ljudmila A. Karamysheva, Lev M. Blinov, Evgeny I. Kovshev, Nikolai M. Shtykov, Viktor V. Titov, Vadim M. Shoshin, Irina F. Agafonova, Mikhail I. Barnik