Electron gun with lens which changes beam into nonaxisymmetric s

Details Electron gun with lens which changes beam into nonaxisymmetric s Electron gun with lens which changes beam into nonaxisymmetric s

1991-06-07

1993-05-18

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

315 15, 315382, H01J 2938, H01J 2946

Patent

active

052124231

ABSTRACT:
An electron gun has one first-type electron lens in the focusing electrode which changes the cross-sectional shape of the electron beam into a nonaxisymmetric shape with increase in the degree of the electron beam deflection by applying a first voltage varying in synchronism with deflection, and one second-type axisymmetric electron lens in the focusing electrode which weakens the lens power with increase in the degree of the electron beam deflection by applying a second voltage increasing with the degree of deflection.

REFERENCES:
patent: 4967120 (1990-10-01), Katsuma et al.

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