Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2004-09-09
2009-02-17
Luu, Thanh X (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S2140VT
Reexamination Certificate
active
07491918
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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Fukasawa Atsuhito
Kawai Yoshihiko
Kimura Suenori
Kyushima Hiroyuki
Negi Yasuharu
Hamamatsu Photonics K.K.
Luu Thanh X
Oliff & Berridg,e PLC
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