Patents Assigned to Hamamatsu Photonics Kabushiki Kiasha
  • Photomultiplier tube using means of preventing divergence of electrons
    Patent number: 4937506
    Abstract: A photomultiplier tube comprising a photocathode, a plurality of mesh dynodes arranged parallel to the photocathode, an anode that is disposed in a face-to-face relationship with the photocathode in such a manner that the mesh dynodes are interposed between the anode and the photocathode, the anode being divided into segments larger than the openings of each dynode, and at least one layer of focusing electrode for focusing an electron beam by the lens action which is disposed between the photocathode and the anode.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: June 26, 1990
    Assignee: Hamamatsu Photonics Kabushiki Kiasha
    Inventors: Suenori Kimura, Masuo Ito, Hiroyuki Kyushima