Electron gun

Details Electron gun Electron gun

1986-01-03

1987-02-03

Schor, Kenneth M.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313414, H01J 2946, H01J 2950

Patent

active

046410589

ABSTRACT:
An electron gun is proposed which has a cathode for generating an electron beam and at least three grids, each having an opening. A pre-focusing electron lens and a main focusing electron lens are formed between the grids in the order named from the cathode to the grids. The pre-focusing lens constitutes a first asymmetric electron lens. The main focusing electron lens constitutes a second asymmetric electron lens. The first and second asymmetric electron lenses have focusing actions whose relatively stronger components are effected along directions substantially perpendicular to each other.

REFERENCES:
patent: 3919583 (1975-11-01), Haske et al.
patent: 4143293 (1979-03-01), Hosokoshi et al.
patent: 4251747 (1981-02-01), Burdick
patent: 4322655 (1982-03-01), Takenaka et al.
patent: 4334169 (1982-06-01), Takenaka et al.
patent: 4481003 (1984-11-01), Yabe et al.

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