JPS57182947A - Electrostatic focusing image pickup tube - Google Patents

Electrostatic focusing image pickup tube

Info

Publication number
JPS57182947A
JPS57182947A JP6830781A JP6830781A JPS57182947A JP S57182947 A JPS57182947 A JP S57182947A JP 6830781 A JP6830781 A JP 6830781A JP 6830781 A JP6830781 A JP 6830781A JP S57182947 A JPS57182947 A JP S57182947A
Authority
JP
Japan
Prior art keywords
grids
image pickup
pickup tube
grid
electrodes
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
JP6830781A
Other languages
Japanese (ja)
Inventor
Kinjiro Gunbe
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6830781A priority Critical patent/JPS57182947A/en
Publication of JPS57182947A publication Critical patent/JPS57182947A/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
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/4824—Constructional arrangements of electrodes
    • H01J2229/4827—Electrodes formed on surface of common cylindrical support

Abstract

PURPOSE:To increase the roundness of plural cylindrical electrodes, which form the electron lens part of an electrostatic focusing image pickup tube, by installing the said electrodes inside a cylindrical insulating body, and inserting electrode fixing pieces into a number of holes provided in the side wall of the said cylindrical body so as to make the said electrodes to be joined and fixed together. CONSTITUTION:An electron lens part consisting of a third grid 9, a fourth grid 10, and a fifth grid 11 is installed inside a cylindrical body 16, which has electric insulating property and is made of a material such as glass, ceramics, alumina or steatite. A number of holes 16a are provided in the side wall of the body 16 so that they correspond to the grids 9, 10 and 11. In addition, electrode fixing pieces 17 are inserted into the holes 16a, and are fixed to the grids 9, 10 and 11 by welding. As a result, the roundnesses of the grids 9, 10 and 11 are increased by facilitating the assembly of the image pickup tube by enabling metal cores to be inserted into the grids 9, 10 and 11 during the assembly.
JP6830781A 1981-05-08 1981-05-08 Electrostatic focusing image pickup tube Pending JPS57182947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6830781A JPS57182947A (en) 1981-05-08 1981-05-08 Electrostatic focusing image pickup tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6830781A JPS57182947A (en) 1981-05-08 1981-05-08 Electrostatic focusing image pickup tube

Publications (1)

Publication Number Publication Date
JPS57182947A true JPS57182947A (en) 1982-11-11

Family

ID=13370004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6830781A Pending JPS57182947A (en) 1981-05-08 1981-05-08 Electrostatic focusing image pickup tube

Country Status (1)

Country Link
JP (1) JPS57182947A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0604951A1 (en) * 1992-12-28 1994-07-06 Sony Corporation Electron gun for a cathode ray tube
EP0638919A1 (en) * 1993-08-09 1995-02-15 Sony Corporation Electron gun for crt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0604951A1 (en) * 1992-12-28 1994-07-06 Sony Corporation Electron gun for a cathode ray tube
EP0638919A1 (en) * 1993-08-09 1995-02-15 Sony Corporation Electron gun for crt

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