Electron gun

Details Electron gun Electron gun

1978-12-04

1981-01-20

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

042465117

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 the first two of those grids or of the first one of those grids and another grid preceding it. The acceleration lens is disposed at such a position that the principal plane of the object space of the lens is located adjacent to the virtual object point of the outermost electron ray of the electron beam incident upon the lens. The lengths of the grids forming both lens are described.

REFERENCES:
patent: 3852637 (1974-12-01), Yamazaki et al.
patent: 3995194 (1976-11-01), Blacker, Jr. et al.
Spangenbergs, Vacuum Tubes, McGraw Hill, pp. 355-359. _
Kemperer, Electron Optics, University Press, pp. 18-21. _

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