Method and system for controlling electron beam quantity in came

Details Method and system for controlling electron beam quantity in came Method and system for controlling electron beam quantity in came

1974-05-17

1976-12-21

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

178DIG29, H04N 316

Patent

active

039990117

ABSTRACT:
A method and system for controlling the quantity of an electron beam in a camera tube in which scanning beam current scans a target electrode to be converted into signal current by the target electrode and this signal current is fed back in the form of a voltage signal to a beam control electrode through a feedback circuit, the amplification factor of this feedback circuit being selected to be smaller than the reciprocal of the maximum efficiency of conversion of the scanning beam current into the signal current.

REFERENCES:
patent: 2930929 (1960-03-01), Shelton
patent: 3392236 (1968-07-01), Nielsen et al.
patent: 3578908 (1971-05-01), Tompkins
patent: 3610823 (1971-10-01), Haenen et al.
patent: 3644667 (1972-02-01), Shimotsuma et al.
patent: 3715490 (1973-02-01), Okada

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