ELECTRON TUBE - HAMAMATSU PHOTONICS KK

Title:

ELECTRON TUBE

Document Type and Number:

WIPO Patent Application WO/2005/027177

Kind Code:

A1

Abstract:

An enclosure (2) has a glass bulb body (4) and a tubular glass bulb base (5). The glass bulb body (4) is composed of a generally spherical upper semispherical portion (4a) and a generally spherical lower semispherical portion (4b). The lower semispherical portion (4a) is connected between the upper semispherical portion (4a) and the glass bulb base (5). On the inner wall of the glass bulb body (4), a photoelectric surface (11) is formed. An avalanche photodiode (APD) (15) is disposed in the glass bulb base (5) in a position nearer to the glass bulb body (4) than the intersection (S) of the imaginary extension curve (I) of the lower semispherical portion (4b) and the axis (Z). When light enters the photoelectric surface (11), the photoelectric surface (11) emits electrons. The electrons are converged near and above the surface of the (APD) (15) by the electric field inside the electron tube (1). Therefore the electrons enter the APD (15) efficiently and are detected.

Inventors:

KYUSHIMA HIROYUKI (JP)
SUYAMA MOTOHIRO (JP)
KIMURA SUENORI (JP)
NEGI YASUHARU (JP)
FUKASAWA ATSUHITO (JP)
KAWAI YOSHIHIKO (JP)
UCHIYAMA ATSUSHI (JP)
EGAWA YASUYUKI (JP)

Application Number:

PCT/JP2004/013129

Publication Date:

March 24, 2005

Filing Date:

September 09, 2004

Export Citation:

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Assignee:

HAMAMATSU PHOTONICS KK (JP)
KYUSHIMA HIROYUKI (JP)
SUYAMA MOTOHIRO (JP)
KIMURA SUENORI (JP)
NEGI YASUHARU (JP)
FUKASAWA ATSUHITO (JP)
KAWAI YOSHIHIKO (JP)
UCHIYAMA ATSUSHI (JP)
EGAWA YASUYUKI (JP)

International Classes:

H01J40/04; H01J40/12; H01J43/28; H01J40/14; H01J40/16; H01J43/18; (IPC1-7): H01J40/04; H01J40/14

Foreign References:

JPH08148114A	1996-06-07
JPH09297055A	1997-11-18
JPH11102658A	1999-04-13
JPH0935680A	1997-02-07
US4870473A	1989-09-26
EP0805478A2	1997-11-05

Other References: