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:
Jul. 23, 2013
Filed:
Oct. 14, 2010
Hideki Shimoi, Hamamatsu, JP;
Hiroyuki Kyushima, Hamamatsu, JP;
Hideki Shimoi, Hamamatsu, JP;
Hiroyuki Kyushima, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu-shi, Shizuoka, JP;
Abstract
The photomultiplier tubeis provided with an electron multiplying parthaving a plurality of stages of dynodestoarrayed along a direction at which electrons are multiplied on an inner surfaceof a casingand a photocathodeand an anode partinstalled so as to be spaced away form the electron multiplying partinside the casing. Each of the dynodetois provided with a plurality of columnar partstowhere secondary electron emitting surfacestoare formed, thereby forming electron multiplying channels C between adjacent columnar parts. An opposing surfacewhich opposes a columnar partwhich is a previous stage at a columnar partwhich is a subsequent stage is formed in such a manner that both end partsin a direction along the inner surfaceof the opposing surfaceproject to the first end side from a sitewhich opposes the end part of the second end side on the secondary electron emitting surfaceof the columnar part