Electron gun

Details Electron gun Electron gun

1980-04-29

1983-05-10

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

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

H01J 2946, H01J 2956

Patent

active

043831990

ABSTRACT:
The disclosed electron gun comprises a main focussing electron lens formed of three aligned grids and an acceleration electron lens preceding the main electron lens and formed of first two of those grids or of a first one of those grids and another grid preceding it. The acceleration lens is disposed at such a position that the principal plane for an object space of the lens is located adjacent to a virtual object point of the outermost electron ray of an electron beam incident upon the lens. Lengths of the grids forming both lens are described.

REFERENCES:
patent: 3417199 (1968-12-01), Yoshida et al.
Spangenbergs, Vacuum Tubes, McGraw Hill, pp. 355-359.
Kemperer, Electron Optics, University Press, pp. 18-21.

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