Dynamic focusing electron gun

Details Dynamic focusing electron gun Dynamic focusing electron gun

1989-11-03

1991-06-18

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, H01J 2950

Patent

active

050251899

ABSTRACT:
A dynamic focusing electron gun for high resolution includes a triode part and a main lens. The main lens includes a first focusing electrode disposed proximate the triode part, a second focusing electrode disposed proximate an anode electrode, a static potential electrode and a dynamic potential electrode disposed between the first and second focusing electrodes to form a dynamic quadrupole lens. The dynamic focusing electron gun produces a high resolution image with a small radius beam spot with low astigmatism, low spherical aberration, and good voltage endurance characteristics.

REFERENCES:
patent: 4701678 (1987-10-01), Blacker et al.
patent: 4704565 (1987-11-01), Blacker et al.
patent: 4771216 (1988-09-01), Blacker et al.
patent: 4814670 (1989-03-01), Suzuki et al.
patent: 4825120 (1989-04-01), Takahashi et al.

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