Photomultiplier tube

Details Photomultiplier tube Photomultiplier tube

2004-12-24

2010-12-21

Won, Bumsuk (Department: 2889)

Electric lamp and discharge devices

Photosensitive

Photomultiplier

C313S532000, C313S534000, C313S1030CM

Reexamination Certificate

active

07855510

ABSTRACT:
A photomultiplier tube includes: a cathode, a plurality of dynodes, and an electron lens forming electrode. The cathode emits electrons in response to incident light. The plurality of dynodes multiplies electrons emitted from the cathode. The electron lens forming the electrode is disposed in a prescribed position in relation to an edge of a first dynode positioned in a first stage from the cathode and an edge of a second dynode positioned in a second stage from the cathode, and smoothes an equipotential surface in a space between the first dynode and the second dynode along a longitudinal direction of the first dynode. This structure improves time resolution in response to incident light.

REFERENCES:
patent: 3917973 (1975-11-01), Needle et al.
patent: 4431943 (1984-02-01), Faulkner et al.
patent: 5616987 (1997-04-01), Ohmura et al.
patent: 2003/0132370 (2003-07-01), Kimura et al.
patent: 0 539 229 (1996-03-01), None
patent: 0 713 243 (1996-05-01), None
patent: A-43-000443 (1968-01-01), None
patent: A-57-124842 (1982-08-01), None
patent: A-05-114384 (1993-05-01), None
patent: A-08-148114 (1996-06-01), None
patent: A-2002-042719 (2002-02-01), None
Dec. 8, 2009 Office Action issued in Japanese Patent Application No. 2004-003037 with English-language translation.

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