PHOTOMULTIPLIER - HAMAMATSU PHOTONICS KK

Title:

PHOTOMULTIPLIER

Document Type and Number:

WIPO Patent Application WO/2005/091333

Kind Code:

A1

Abstract:

A photomultiplier comprising a screen convergence electrode (20) disposed between a first stage dynode (Dy1) and a second stage dynode (Dy2) and a plurality of third and subsequent stage dynodes. The screen convergence electrode has a first screen (21), a second screen (22), a flat plate (23) and an opening. The first screen is disposed on the first stage dynode side of the opening to extend toward the photoelectric plane side beyond the lower end of the first stage dynode. The second screen is disposed on the second stage dynode side of the opening to extend toward the photoelectric plane side beyond the lower end of the second stage dynode. Electrons being emitted depending on light incident to the photoelectric plane (3) can thereby impinge efficiently on each dynode at an electron multiplying section regardless of the emitting position on the photoelectric plane and thereby the light incident to the photoelectric plane can be detected substantially uniformly regardless of the incident position.

Inventors:

KIMURA SUENORI (JP)
OHMURA TAKAYUKI (JP)
YAMAGUCHI TERUHIKO (JP)
ITO MASUO (JP)

Application Number:

PCT/JP2004/003855

Publication Date:

September 29, 2005

Filing Date:

March 22, 2004

Export Citation:

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Assignee:

HAMAMATSU PHOTONICS KK (JP)
KIMURA SUENORI (JP)
OHMURA TAKAYUKI (JP)
YAMAGUCHI TERUHIKO (JP)
ITO MASUO (JP)

International Classes:

H01J43/06; H01J43/20; H01J43/22; (IPC1-7): H01J43/20; H01J43/22

Foreign References:

JPH06150876A	1994-05-31
JPH0118794C2
JPH0817389A	1996-01-19
JPH07245078A	1995-09-19
JPH07192686A	1995-07-28

Attorney, Agent or Firm:

Koizumi, Shin (37-4 Yushima 3-chom, Bunkyo-ku Tokyo 34, JP)

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