Patents by Inventor Katsuhiko Yasaka

Katsuhiko Yasaka 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).

  • Microscope
    Patent number: 7957058
    Abstract: A microscope for introducing light from a light source via an objective lens to a sample so that a user observes the sample via the objective lens includes: a minute opening arranged in an optical path between the light source and the objective lens and on a focal plane of the image side of the objective lens or at a position conjugate with its conjugate plane; position adjusting means for adjusting the position of the minute opening so that the light from the light source via the minute opening is incident to the sample at the Brewster's angle; an polarizing element arranged in the optical path between the light source and the objective lens for extracting rectilinear polarized light from the light from the light source and applying the rectilinear polarized light to the sample.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: June 7, 2011
    Assignees: National University Corporation Nara Institute of Science and Technology, Nikon Corporation
    Inventors: Tadao Sugiura, Katsuhiko Yasaka, Takashi Kawahito, Kumiko Matsui
  • MICROSCOPE
    Publication number: 20100142038
    Abstract: A microscope for introducing light from a light source via an objective lens to a sample so that a user observes the sample via the objective lens includes: a minute opening arranged in an optical path between the light source and the objective lens and on a focal plane of the image side of the objective lens or at a position conjugate with its conjugate plane; position adjusting means for adjusting the position of the minute opening so that the light from the light source via the minute opening is incident to the sample at the Brewster's angle; an polarizing element arranged in the optical path between the light source and the objective lens for extracting rectilinear polarized light from the light from the light source and applying the rectilinear polarized light to the sample.
    Type: Application
    Filed: June 30, 2006
    Publication date: June 10, 2010
    Inventors: Tadao Sugiura, Katsuhiko Yasaka, Takashi Kawahito, Kumiko Matsui