Electron gun modulated by optoelectronic switching

Details Electron gun modulated by optoelectronic switching Electron gun modulated by optoelectronic switching

1991-10-09

1994-05-17

Lee, Benny T.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 533, 315149, 313293, 313524, H01J 2306

Patent

active

053131380

ABSTRACT:
An electron gun is modulated by an optoelectronic switching device. This switching device comprises a modulated light source and at least one GaAs or Si solid-state optoelectronic switch, this switch being non-conductive when not illuminated and conductive when illuminated by the modulated light source; the device also includes components to transmit the light from the source to the switch(es). In one embodiment, the modulated light source is a laser and in a second embodiment the source is a continuous source externally modulated by a mechanical or electrooptical device. The optoelectronic switching device is connected between a high-voltage source and the cathode of an electron gun, thus modulating the cathode.
The invention is particularly applicable to microwave electron tubes.

REFERENCES:
patent: 4313072 (1982-01-01), Wilson et al.
patent: 4453108 (1984-06-01), Freeman, Jr.
patent: 4703228 (1987-10-01), West
patent: 4749906 (1988-06-01), Tran et al.
patent: 5043630 (1991-08-01), Faillon et al.

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