Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1990-04-10
1991-08-27
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313537, H01J 3150
Patent
active
050435680
ABSTRACT:
A first part of input light containing both background light and signal light is extracted by a sampling streak tube and converted to a first electric signal by a photodetector. A second part of the input light containing only background light is extracted by the same sampling streak tube by offsetting the sampling timing and converted to a second electric signal by the photodetector. A signal component corresponding to the signal light is extracted by taking the difference between the first and second electric signals. In one embodiment, the sampling timing is offset by applying a chopping voltage to chopping electrodes provided in the sampling streak tube.
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Aoshima Shinichiro
Nakamura Takuya
Takahashi Hironori
Tsuchiya Yutaka
Hamamatsu Photonics K. K.
Nelms David C.
Shami K.
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