Patents by Inventor Norimoto Nochi

Norimoto Nochi 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).

  • Composite prism and optical pickup using the same
    Patent number: 6005835
    Abstract: A prism and an optical pickup employing such prism includes a parallel prism having a polarization beam splitter film and a reflection film. The polarization beam splitter film is formed on an angled plane of a glass material having an approximate parallelogram cross-section, and consists of a multi-layer film of a composite film made of Si and SiO.sub.2-x (x<0.5) and multiple layers of multiple dielectric films. The reflection film is formed on an angled plane of the same glass material approximately parallel to the angled plane on which the polarization beam splitter film is formed, and consists of a multi-layer film of a composite film made of metal Si and oxide SiO.sub.2-x (x<0.5) as a high refractive film and multiple layers of multiple dielectric films as a relatively low refractive film.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: December 21, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyasu Tsuji, Toshio Fukazawa, Shogo Nasu, Norimoto Nochi, Shinji Uchida, Tsuguhiro Korenaga