Cathode ray tube

Details Cathode ray tube Cathode ray tube

1985-02-12

1987-03-17

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313432, 313439, 313450, 313460, H01J 2956, H01J 2962, H01J 3126

Patent

active

046510508

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, and an electrostatic lens means positioned between the electron beam source and the target. The lens means has a first cylindrical electrode and a second cylindrical electrode positioned along the electron beam path to focus the electron beam. The second cylindrical electrode is divided into four patterned electrodes, and each of the deflection electrodes has a lead which is formed across the first cylindrical electrode but is isolated therefrom. The portion of the leads is positioned to cause a predeflection to the electron beam.

REFERENCES:
patent: 3731136 (1973-05-01), Roussin
patent: 3890529 (1975-06-01), Hutter et al.
patent: 3922580 (1975-11-01), Hutter

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