Photomultiplier tube

Details Photomultiplier tube Photomultiplier tube

2005-09-20

2005-09-20

Porta, David (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S207000

Reexamination Certificate

active

06946641

ABSTRACT:
A metal side tube (2), a glass faceplate (3), and a stem plate ( ) constitute a hermetically sealed vessel (5) for a photomultiplier tube. An edge portion (20) is provided at on open end (A) of the side tube (2). The edge portion (2) is embedded in the faceplate (3) in such a manner as to strike on the faceplate (3). Accordingly, high hermeticity at a joint between the side tube (2) and the faceplate (3) is ensured. The edge portion (20) extends upright in an axial direction of the side tube (2), so that the edge portion (20) can be embedded as close to a side face (3c) of the faceplate (3) as possible. This structure increases an effective sensitive area of the faceplate (3) to nearly 100%, and decreases dead area as close to 0 as possible. As described above, the photomultiplier tube (1) according to the present invention has enlarged effective sensitive area of the side tube (3) and enhanced hermeticity of the joint between the faceplate (3) and the side tube (2).

REFERENCES:
patent: 3951698 (1976-04-01), Wilson et al.
patent: 5504386 (1996-04-01), Kyushima et al.
patent: 5594301 (1997-01-01), Sawai et al.
patent: 5864207 (1999-01-01), Kume et al.
patent: 6472664 (2002-10-01), Kyushima et al.
patent: 6650049 (2003-11-01), Kyushima et al.
patent: 6762555 (2004-07-01), Kyushima et al.
patent: A 5-290793 (1993-11-01), None
patent: A 11-345587 (1999-12-01), None
patent: 11-345588 (1999-12-01), None
patent: A 2000-149860 (2000-05-01), None
patent: 2000-149861 (2000-05-01), None
U.S. patent application Ser. No. 10/275,654, Shimoi et al., filed Nov. 8, 2002.
U.S. Appl. No. 10/275,654, filed Nov. 08, 2002, Shimoi et al.

Affiliated with

Also associated with

Rating

Photomultiplier tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photomultiplier tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photomultiplier tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3419834