JPS5593639A - Electromagnetic focussing cathode ray tube - Google Patents
Electromagnetic focussing cathode ray tubeInfo
- 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
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
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)
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 |
-
1979
- 1979-01-08 JP JP22379A patent/JPS5593639A/en active Granted
Cited By (1)
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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