Electric lamp and discharge devices – Photosensitive – Photomultiplier
Reexamination Certificate
2006-11-08
2008-11-11
Santiago, Mariceli (Department: 2879)
Electric lamp and discharge devices
Photosensitive
Photomultiplier
C313S532000, C313S1030CM, C313S104000, C313S536000
Reexamination Certificate
active
07449834
ABSTRACT:
The present invention relates to a photomultiplier that realizes significant improvement of response time properties with a structure enabling mass production. The photomultiplier comprises an electron multiplier section for cascade-multiplying photoelectrons emitted from said photocathode. The electron multiplier has a structure holding at least two dynode sets while sandwiching the tube axis of a sealed container in this the electron multiplier is housed. In particular, the first dynodes respectively belonging to the two dynode sets are arranged such that their back surfaces opposing respective secondary electron emitting surfaces face each other while sandwiching the tube axis. In this arrangement, because each first dynode itself is positioned near the tube axis, the efficiency of collection of photoelectrons arriving at the periphery of the first dynode is improved significantly.
REFERENCES:
patent: 3849644 (1974-11-01), Ibaugh
patent: 4456852 (1984-06-01), Faulkner et al.
patent: 4881008 (1989-11-01), Kyushima et al.
patent: 5077504 (1991-12-01), Helvy
patent: 5124551 (1992-06-01), Urakami et al.
patent: 5416382 (1995-05-01), L'Hermite
patent: 5438191 (1995-08-01), Kimura et al.
patent: 5481158 (1996-01-01), Kato et al.
patent: 5532551 (1996-07-01), Kyushima et al.
patent: 5578891 (1996-11-01), Sakai et al.
patent: 5581158 (1996-12-01), Quazi
patent: 5598060 (1997-01-01), L'Hermite
patent: 5689152 (1997-11-01), Boutot et al.
patent: 6927538 (2005-08-01), Ishizu et al.
patent: 7064485 (2006-06-01), Kimura et al.
patent: 2003/0146697 (2003-08-01), Ishizu et al.
patent: 2004/0251417 (2004-12-01), Yamaguchi et al.
patent: 2005/0212421 (2005-09-01), Kimura et al.
patent: 57-194445 (1982-11-01), None
patent: 2005/091332 (2005-09-01), None
patent: 2005/091333 (2005-09-01), None
patent: 2006/085018 (2006-08-01), None
Hidehiro Kume et al., “Photomultiplier Tubes For BaF2/BGO Crystal Scintillators”, IEEE Transaction on Nuclear Science, Feb. 1986, pp. 364-369, vol. 33, No. 1.
T. Yamashita et al., “New Dual Rectangular Photomultiplier Tube For Positron Ct.” IEEE Catalog No. 82CH1751-7, International Workshop on Physics and Engineering in Medical Imaging, Mar. 15-18, 1982, pp. 209-211, Pacific Grove, California.
Kimura Suenori
Ohmura Takayuki
Drinker Biddle & Reath LLP
Hamamatsu Photonics K.K.
Santiago Mariceli
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