Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Suenori Kimura0
Motohiro Suyama0
Yoshihiko Kawai0
Yasuharu Negi0
Atsuhito Fukasawa0
Hiroyuki Kyushima0
Date of Patent
February 17, 2009
0Patent Application Number
105713220
Date Filed
September 9, 2004
0Patent Primary Examiner
Patent abstract
An insulating tube has one end and another end. An avalanche photodiode (APD) is provided outside the one end of the insulating tube. The another end of the insulating tube is air-tightly connected to an outer flange through a stem inner wall. Capacitors electrically connected to the APD are provided in the insulating tube. The capacitors remove direct current components from signals that the APD generates when detecting electrons. By providing the capacitors in the insulating tube, response of output signals can be prevented from being impaired.
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