DISPLAY TUBE INCLUDING HELICAL FOCUSING LENS WITH NON-ROTATIONALLY SYMMETRICAL LENS ELEMENT

DISPLAY TUBE INCLUDING HELICAL FOCUSING LENS WITH NON-ROTATIONALLY SYMMETRICAL LENS ELEMENT

A display tube comprising an electron gun having a beam-shaping part and a focusing structure. The focusing structure comprises an elongate hollow structure with a high-ohmic resistive layer provided on the inner and/or outer surface and comprises means for forming a non-rotationally symmetrical len...

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Bibliographische Detailangaben
Hauptverfasser: HELLINGS GERARDUS JACOBUS ARCADIUS, HIMMELBAUER ERICH EDUARD, VAN DER HEIJDEN ANTONIUS WILHELMUS FRANCISCUS
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Beschreibung
Zusammenfassung:A display tube comprising an electron gun having a beam-shaping part and a focusing structure. The focusing structure comprises an elongate hollow structure with a high-ohmic resistive layer provided on the inner and/or outer surface and comprises means for forming a non-rotationally symmetrical lens element in the area of the focusing structure. This may be a structure generating an electric multipole (for example, dipole or quadrupole) which may be incorporated particulary in the high-ohmic resistive layer.