JPS5593639A - Electromagnetic focussing cathode ray tube - Google Patents

Electromagnetic focussing cathode ray tube

Info

Publication number
JPS5593639A
JPS5593639A JP22379A JP22379A JPS5593639A JP S5593639 A JPS5593639 A JP S5593639A JP 22379 A JP22379 A JP 22379A JP 22379 A JP22379 A JP 22379A JP S5593639 A JPS5593639 A JP S5593639A
Authority
JP
Japan
Prior art keywords
magnetic field
magnetizing yoke
magnetic
permanent magnet
magnetizing
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.)
Granted
Application number
JP22379A
Other languages
Japanese (ja)
Other versions
JPS6241372B2 (en
Inventor
Kyohei Fukuda
Soichi Sakurai
Masanobu Takada
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 JP22379A priority Critical patent/JPS5593639A/en
Publication of JPS5593639A publication Critical patent/JPS5593639A/en
Publication of JPS6241372B2 publication Critical patent/JPS6241372B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the leak magnetic field from a magnetic circuit consisting of permanent magnets and magnetizing yokes and eliminate the influence on the deflection magnetic field system by extending only the circumferential end of the magnetizing yoke on the side beam end.
CONSTITUTION: The magnetizing yoke 14 consisting of soft and ferro magnetic materials is tightly placed on both magnetic pole surfaces of the permanent magnet 8 so that the disk shaped magnetizing yoke 14a in which the thru holes 7 of the electron beams 9, 10 and 11 are provided inline can match the procession direction of the electron beams 9, 10 and 11. The cylindrical section 14b which is parallel in the axial direction from the circumferential end of the magnetizing yoke 14a and which extends inversely from the end surface of the permanent magnet 8 is formed in a body. A greater part of the magnetic fields from the permanent magnet 8 is produced as the focussing magnetic field distribution 12 and the leak magnetic field 13 inside the cylindrical section 14b is reduced sharply.
COPYRIGHT: (C)1980,JPO&Japio
JP22379A 1979-01-08 1979-01-08 Electromagnetic focussing cathode ray tube Granted JPS5593639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22379A JPS5593639A (en) 1979-01-08 1979-01-08 Electromagnetic focussing cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22379A JPS5593639A (en) 1979-01-08 1979-01-08 Electromagnetic focussing cathode ray tube

Publications (2)

Publication Number Publication Date
JPS5593639A true JPS5593639A (en) 1980-07-16
JPS6241372B2 JPS6241372B2 (en) 1987-09-02

Family

ID=11467954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22379A Granted JPS5593639A (en) 1979-01-08 1979-01-08 Electromagnetic focussing cathode ray tube

Country Status (1)

Country Link
JP (1) JPS5593639A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014075346A (en) * 2002-06-26 2014-04-24 Semequip Inc Ion implantation device and method of manufacturing semiconductor by implantation of boron hydride cluster ions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014075346A (en) * 2002-06-26 2014-04-24 Semequip Inc Ion implantation device and method of manufacturing semiconductor by implantation of boron hydride cluster ions

Also Published As

Publication number Publication date
JPS6241372B2 (en) 1987-09-02

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