Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1977-01-06
1979-01-30
Segal, Robert
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313432, 313434, H01J 2970, H01J 2962
Patent
active
041374797
ABSTRACT:
A cathode ray tube includes first and second electrostatic quadrupole lens between the electron gun and the vertical deflection plates to properly focus the electron beam before it enters the vertical deflection plates. A third electrostatic quadrupole lens is located between the vertical deflection plates and the horizontal deflection plates to enhance the angle of deflection as well as to properly focus the electron beam as it moves from the vertical deflection plates into the horizontal deflection plates. A meshless scan expansion lens follows the horizontal deflection plates and is formed of aligned tubular members having interdigitated sections thereby forming a fourth quadrupole lens which accelerates the electron beam and expands it prior to being impinged onto the fluorescent screen.
REFERENCES:
patent: 2412687 (1946-12-01), Klemperer
patent: 2520813 (1950-08-01), Rudenberg
patent: 3496406 (1970-02-01), Deschamps
patent: 3497744 (1970-02-01), Himmelbauer et al.
patent: 3792303 (1974-02-01), Albertin et al.
patent: 3922580 (1975-11-01), Hutter
La Rue Adrian J.
Segal Robert
Tektronix Inc.
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