Method and means for dynamic correction of electrostatic deflect

Details Method and means for dynamic correction of electrostatic deflect Method and means for dynamic correction of electrostatic deflect

1977-07-05

1979-02-27

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315409, H01J 2956

Patent

active

041421329

ABSTRACT:
An electron beam tube electrostatic deflection system and method of operation is described. The electron beam tube includes an eight-fold deflector and means are provided for applying two different quadrupole correction electric potentials to selected ones of the eight-fold deflector members and for applying an octupole correction electrical potential to all eight deflector members. In the preferred embodiment, the quadrupole and octupole correction potentials applied to one set of four deflector members are represented by the respective values (V.sub.2c - V), (-V.sub.2c - V), (V.sub.2c - V) and (-V.sub.2c - V), and the quadrupole and octupole correction potentials applied to the second set of four deflector members are represented respectively by the values (V.sub.2s + V), (-V.sub.2s + V), (V.sub.2s + V) and (-V.sub.2s + V) where the quadrupole correction electric potential

REFERENCES:
patent: 3491236 (1970-01-01), Newberry
patent: 3641510 (1972-02-01), Chen
patent: 3961223 (1976-06-01), Ray et al.

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