Electric lamp and discharge devices – Photosensitive – Photocathode
Patent
1997-05-01
1999-06-29
O'Shea, Sandra
Electric lamp and discharge devices
Photosensitive
Photocathode
313532, 250207, 250214VT, H01J 4004
Patent
active
059172827
ABSTRACT:
This invention relates to an electron tube which stabilizes the orbits of electrons accelerated and focused by an electron lens and has a structure for effectively suppressing noise generated due to discharge. This electron tube has, at two ends of an insulating container, a cathode electrode and an anode electrode which constitute the electron lens. Particularly, in the electron tube, one end of the cathode electrode and a photocathode are supported by a conductive member arranged at one end of the insulating container, and the cathode electrode is electrically connected to the photocathode. The cathode electrode partially extends to a stem along the inner wall of the insulating container and is tapered toward the stem so that the distal end portion of the cathode electrode is separated from the inner wall of the insulating container. Therefore, the electron tube realizes, regardless of the size of the insulating container, a structure for preventing the insulating container from being charged and suppressing discharge followed by light emission between the cathode electrode and the insulating container.
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Asakura Norio
Hirano Ken
Kawai Yoshihiko
Kimura Suenori
Morita Tetsuya
Day Michael
Hamamatsu Photonics K.K.
O'shea Sandra
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