Cathode ray tube

Details Cathode ray tube Cathode ray tube

1985-05-10

1987-11-17

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313435, 313479, H01J 2962

Patent

active

047076348

ABSTRACT:
A cathode ray tube comprises an envelope, an electron beam source positioned at one end of the envelope, a target positioned at another end of the envelope, a mesh electrode positioned opposite to the target, and an electrostatic lens means positioned between the electron beam source and the mesh electrode. The lens means has a high-tension electrode and a low-tension electrode positioned along the electron beam path to focus the electron beam. The low-tension electrode is divided into four arrow or zig-zag patterns to deflect the electron beam. The length l between the electron beam source and the mesh electrode and the length x of the high-tension electrode are selected to optimize the magnification, aberration and landing error of the electrostatic lens means.

REFERENCES:
patent: 2770748 (1956-11-01), Schlesinger et al.
patent: 3286114 (1966-11-01), Schlesinger

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