Electron gun with polygonal shaped rim electrode

Details Electron gun with polygonal shaped rim electrode Electron gun with polygonal shaped rim electrode

1998-06-29

2000-10-17

Day, Michael H.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, H01S 2950

Patent

active

06133684&

ABSTRACT:
A electron gun includes three cathodes aligned in line, and a plurality of electrodes sequentially arranged from these cathodes in a direction in which the cathodes emit electron beams, wherein, of the plurality of electrodes, the facing portions of a convergence electrode and a final acceleration electrode forming a main lens are respectively constructed by cylindrical common peripheral rim electrodes long in the inline direction which form aperture holes common to the three electron beams, and the inner circumferential surface of the peripheral rim electrode of at least one of the convergence electrode and the final acceleration electrode has an almost polygonal shape with substantially six or more sides so as to correct any multipole lens components.

REFERENCES:
patent: 4370592 (1983-01-01), Hughes et al.
patent: 4626738 (1986-12-01), Gerlach
patent: 4766344 (1988-08-01), Say

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