Cathode-ray tube with variable energy of beam electrons

Details Cathode-ray tube with variable energy of beam electrons Cathode-ray tube with variable energy of beam electrons

1977-06-08

1979-02-27

Segal, Robert

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313433, 313431, 313450, H01J 2956, H01J 2964

Patent

active

041421337

ABSTRACT:
A cathode-ray tube with variable energy of electrons of a beam formed by an electron accelerating means and an electron focusing means which are arranged in tandem along the beam axis. The electron focusing means comprises a magnetic lens with a constant magnetic-field intensity and an electrostatic lens so arranged with respect to the magnetic lens that defocusing of the electron beam by the magnetic lens, due to variations in the energy of the beam electrons, is compensated for. The electrostatic lens comprises two axisymmetric electrodes, the first electrode being electrically associated with the electron accelerating means, along the beam axis, and the second electrode being electrically associated with the screen of the cathode-ray tube.

REFERENCES:
patent: 2227034 (1940-12-01), Schlesinger
patent: 2888606 (1959-05-01), Beam
patent: 2954499 (1960-09-01), Gundert et al.
patent: 3023336 (1962-02-01), Frenkel
patent: 3040205 (1962-06-01), Walker
patent: 3143681 (1964-08-01), Schlesinger
patent: 3295001 (1966-12-01), Burdick et al.
patent: 3375390 (1968-03-01), Schlesinger
patent: 3696261 (1972-10-01), Miyaoka
patent: 3748514 (1973-07-01), Standaart
patent: 3778666 (1973-12-01), Miyaoka et al.
patent: 3887830 (1975-06-01), Spencer

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