Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1997-05-01
1999-02-23
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250214VT, 313532, 313541, H01J 4312
Patent
active
058747281
ABSTRACT:
This invention relates to an electron tube having a structure for enabling a stable operation for a long time. In the electron tube, at least a confining mechanism is arranged between a photocathode and the electron incident surface of a semiconductor device, which are arranged to oppose each other through a container. Particularly, the area of the opening of the confining mechanism is smaller than that of the electron incident surface, thereby confining the orbits of photoelectrons from the photocathode. This structure avoids bombardment of electrons arriving at portions other than the electron incident surface of the semiconductor device and prevents the semiconductor device from being unnecessarily charged.
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Kimura Suenori
Morita Tetsuya
Saito Tetsuya
Suyama Motohiro
Hamamatsu Photonics K.K.
Lee John R.
Westin Edward P.
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