Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1990-12-03
1992-03-31
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313529, H01J 4014
Patent
active
051011000
ABSTRACT:
A streak camera for detecting a light signal representing optical events occurring in ultra-short time intervals, comprising a photocathode, an accelerating electrode, a focusing electrode, an anode, a traveling wave deflector having a deflecting electrode for deflecting photoelectrons emitted from the photocathode with a deflection voltage having a phase velocity, a deflection circuit for controlling the deflection voltage to be applied to the deflecting electrode of the deflector, an electron stream detector having for detecting the electron stream deflected by said deflector, and a voltage control unit for controlling voltages to be applied to the photocathode, the accelerating electrode, the focusing electrode, the anode and the electron stream detector, thereby controlling a potential distribution in a photoelectron transit path. The voltage control unit carrys out a voltage supply operation such that the anode is supplied with a positive voltage below 5 KV with respect to a voltage to be applied to the photocathode, and the focusing electrode is kept at the highest positive potential among the photocathode, the accelerating electrode, the focusing electrode and the anode.
REFERENCES:
patent: 4243878 (1981-01-01), Kalibjian
patent: 4350919 (1982-09-01), Johnson et al.
patent: 4942293 (1990-07-01), Koishi et al.
patent: 5045761 (1991-09-01), Takahashi
"A Specially Designed Femtosecond Streak Image Tube with Temporal Resolution of 50fs", H. Niu et al., General Physics Institute, USSR (no date) (no paging).
"Magnetic Focus Streak-Tube", Electro-Optical Products Division ITT (7/76).
"Theoretical and Experimental Study of Femtosecond Streak Image Tube", H. Niu et al., Xian Institute of Optics and Precision Mechanics (no date & no paging).
Kinoshita Katsuyuki
Suyama Motohiro
Hamamatsu Photonics K.K.
Le Que T.
Nelms David C.
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