JPS55121253A - Focusing lens of electron gun for cathode-ray tube - Google Patents

Focusing lens of electron gun for cathode-ray tube

Info

Publication number
JPS55121253A
JPS55121253A JP2786079A JP2786079A JPS55121253A JP S55121253 A JPS55121253 A JP S55121253A JP 2786079 A JP2786079 A JP 2786079A JP 2786079 A JP2786079 A JP 2786079A JP S55121253 A JPS55121253 A JP S55121253A
Authority
JP
Japan
Prior art keywords
grid
lens
accelerating
cathode
electron gun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2786079A
Other languages
Japanese (ja)
Inventor
Masaya Takenobu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2786079A priority Critical patent/JPS55121253A/en
Publication of JPS55121253A publication Critical patent/JPS55121253A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun

Abstract

PURPOSE:To widely suppress an aberration of the lens and enable a beam spot to be small in diameter, by arranging a plurality of electron lenses with at least an accelerating bipotential lens included in a front stage of the main electron lens. CONSTITUTION:On a central axis S of the electron gun, are arranged a cathode K, the first grid 1, the second grid 2, the third grid 3, the fourth grid 4, the fifth grid 5 and the sixth grid 6, which constitute a focusing lens Lf in the front stage. In the rear stage of the prearranged lens Lf, a focussing lens L is located. An accelerating bipotential lens is constructed by the first accelerating bipotential lens constituted by between the thrid grid 3 and the fourth grid 4 and the second accelerating bipotential lens constituted by between the fifth grid 5 and the sixth grid 6.
JP2786079A 1979-03-09 1979-03-09 Focusing lens of electron gun for cathode-ray tube Pending JPS55121253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2786079A JPS55121253A (en) 1979-03-09 1979-03-09 Focusing lens of electron gun for cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2786079A JPS55121253A (en) 1979-03-09 1979-03-09 Focusing lens of electron gun for cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS55121253A true JPS55121253A (en) 1980-09-18

Family

ID=12232659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2786079A Pending JPS55121253A (en) 1979-03-09 1979-03-09 Focusing lens of electron gun for cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS55121253A (en)

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