Electron gun structure for a pickup tube

Details Electron gun structure for a pickup tube Electron gun structure for a pickup tube

1978-05-22

1980-05-06

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

H01J 2956

Patent

active

042019338

ABSTRACT:
An electron gun structure for a pickup tube comprises a cathode lens electrode assembly, a beam disc electrode and a main lens electrode assembly. The main lens electrode assembly includes first and second electrodes adapted to be supplied with different potentials so as to form a bipotential electron lens in the main lens electrode assembly. The beam disc electrode which has a beam limiting hole is adapted to be supplied with a potential not higher than about 2.5 times the lower one of the potentials to be supplied to the first and second electrodes in the main lens electrode assembly.

REFERENCES:
patent: Re25127 (1962-02-01), Szegho
patent: 2227033 (1940-12-01), Schlesinger
patent: 2971118 (1961-02-01), Burdick
patent: 3090882 (1963-05-01), Benway

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