Dynamic focus electron gun

Details Dynamic focus electron gun Dynamic focus electron gun

1989-11-20

1991-07-16

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2948

Patent

active

050327607

ABSTRACT:
A dynamic focus electron gun includes a tripolar section for releasing and initially forming electron beams; a focus electrode and a dynamic electrode for pre-accelerating and for prefocusing the electron beams; and an anode for finally accelerating and focusing the electron beams wherein vertical and horizontal blades for forming quadrupole lenses at the respective beam passing holes of the focus electrode and the dynamic electrode are installed within the electrodes. According to the electron gun of the present invention, there is no expectation that arcing might occur between the electrodes, and the voltage resistance characteristics and ease of assembly are improved.

REFERENCES:
patent: 4119884 (1978-10-01), Blumenberg et al.
patent: 4208610 (1980-06-01), Schwartz
patent: 4498026 (1985-02-01), Yamauchi et al.
patent: 4737682 (1988-04-01), Alig et al.

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