Patents by Inventor Itsuo Ozawa

Itsuo Ozawa 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).

  • Electron multiplier with improved dynode geometry for reduced crosstalk
    Patent number: 5481158
    Abstract: The present invention relates to a linear multi-anode photomultiplier or electron multiplier on which a plurality of light beams to be measured or energy beams of electrons, ions and so forth are incident one-dimensionally. The object of the present invention is to prevent crosstalk between dynode arrays caused by leaking electrons. A transmission type photomultiplier is characterized in that the direction of secondary electron emission of the first-stage dynode of each dynode array is set in the opposite direction at 180.degree. from that of an adjacent dynode array. Then, adjacent dynode arrays will not oppose each other but are shifted from each other at a predetermined distance in the lateral direction. Accordingly, even if electrons leak from a gap between dynodes of a certain dynode array, the leaking electrons will not enter the adjacent dynode array, thereby preventing crosstalk.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: January 2, 1996
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Hisaki Kato, Suenori Kimura, Kiyoshi Nakatsugawa, Tsuguo Uchino, Itsuo Ozawa, Hiroyuki Onda