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:
Feb. 24, 2009
Filed:
Sep. 07, 2007
Hideki Shimoi, Hamamatsu, JP;
Akira Atsumi, Hamamatsu, JP;
Hiroyuki Kyushima, Hamamatsu, JP;
Hamamatsu Photonics K. K., Hamamatsu, JP;
Abstract
A photomultiplier tube, a photomultiplier tube unit, and a performance-improved radiation detector for increasing a fixing area of a side tube in a faceplate while increasing an effective sensitive area of the faceplate. In the photomultiplier tube, a side face () of the faceplate () protrudes outward from an outer side wall () of a metal side tube (), so that a light receiving area for receiving light passing through a light receiving face () of the faceplate () is increased. The overhanging structure of the faceplate () is conceived based on a glass refractive index. The overhanging structure is aimed to receive light as much as possible which has not been received before. When the metal side tube () is fused to the glass faceplate (), a fusing method is adopted due to joint between glass and metal. Joint operation between the faceplate () and the side tube () is reliably ensured. Accordingly, the overhanging structure of the faceplate () is effective.