The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2011
Filed:
Jun. 01, 2006
Hiroyuki Kyushima, Hamamatsu, JP;
Hideki Shimoi, Hamamatsu, JP;
Hiroyuki Sugiyama, Hamamatsu, JP;
Hitoshi Kishita, Hamamatsu, JP;
Suenori Kimura, Hamamatsu, JP;
Yuji Masuda, Hamamatsu, JP;
Takayuki Ohmura, Hamamatsu, JP;
Hiroyuki Kyushima, Hamamatsu, JP;
Hideki Shimoi, Hamamatsu, JP;
Hiroyuki Sugiyama, Hamamatsu, JP;
Hitoshi Kishita, Hamamatsu, JP;
Suenori Kimura, Hamamatsu, JP;
Yuji Masuda, Hamamatsu, JP;
Takayuki Ohmura, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu-shi, Shizuoka, JP;
Abstract
The present invention relates to a photomultiplier having a fine configuration capable of realizing stable detection accuracy. The photomultiplier has a housing whose inside is maintained vacuum, and a photocathode, an electron-multiplier section, and an anode are disposed in the housing. In particular, one or more control electrodes disposed in an internal space of the housing which surrounds the electron-multiplier section and the anode are electrically connected via one or more connection parts extending from an electron emission terminal of the electron-multiplier section. In this configuration, due to a voltage, instead of the applying between an electron entrance terminal and the electron emission terminal of the electron-multiplier section, being applied between the electron entrance terminal and the control electrodes, an electric potential gradient which is increased gradually from the photocathode side toward the anode side is formed in the electron-multiplier section, and a sufficient electric potential difference is provided between the electron emission terminal of the electron-multiplier section and the anode, which makes it possible to obtain stable detection accuracy.