JPS5539121A - Electromagnetic focus cathode ray tube - Google Patents
Electromagnetic focus cathode ray tubeInfo
- Publication number
- JPS5539121A JPS5539121A JP11171378A JP11171378A JPS5539121A JP S5539121 A JPS5539121 A JP S5539121A JP 11171378 A JP11171378 A JP 11171378A JP 11171378 A JP11171378 A JP 11171378A JP S5539121 A JPS5539121 A JP S5539121A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnetic field
- cathode ray
- ray tube
- surrounding unit
- 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
Links
Abstract
PURPOSE: To reproduce the picture of high resolution, with a uniformly focusing magnetic field provided, by placing a focusing field generating permanent magnet, provided in a neck portion within the cathode ray tube, in a location within the surrounding unit of high permeability material.
CONSTITUTION: In the inside of both end faces of a cylindrical surrounding unit 10 of high permeability material, having a hole 13 for an electron beam to pass, is provided a permanent magnet 11. The permanent magnet 11 is magnetized in the direction axially of the tube neck part, that is, almost in parallel to a passing direction of the electron beam, with a magnetic field Bg generated in the interior of the surrounding unit 10. At this time, a magnetic adjuster plate 12 equalizes a dispersal of magnetization state of the perrmanent magnet 11, to provide a uniformity of distribution of the magnetic field.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11171378A JPS5539121A (en) | 1978-09-13 | 1978-09-13 | Electromagnetic focus cathode ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11171378A JPS5539121A (en) | 1978-09-13 | 1978-09-13 | Electromagnetic focus cathode ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5539121A true JPS5539121A (en) | 1980-03-18 |
Family
ID=14568266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11171378A Pending JPS5539121A (en) | 1978-09-13 | 1978-09-13 | Electromagnetic focus cathode ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5539121A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4439710A (en) * | 1980-07-02 | 1984-03-27 | Hitachi, Ltd. | Electromagnetic focusing cathode-ray tube |
-
1978
- 1978-09-13 JP JP11171378A patent/JPS5539121A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4439710A (en) * | 1980-07-02 | 1984-03-27 | Hitachi, Ltd. | Electromagnetic focusing cathode-ray tube |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB995269A (en) | Permanent magnet device | |
JPS5475215A (en) | Deflecting unit | |
EP0473227A2 (en) | Magnet for use in a drift tube of an X-ray tube | |
JPS5569938A (en) | Color picture tube device | |
JPS5539121A (en) | Electromagnetic focus cathode ray tube | |
JPS56116256A (en) | Flat cathode ray tube | |
JPS5535449A (en) | Electromagnetic focusing type cathode ray tube | |
JPS546762A (en) | Cathode-ray tube | |
JPS5782949A (en) | Electromagnetic focusing type cathode ray tube | |
JPS5539123A (en) | Electromagnetic focus cathode ray tube | |
JPS5455164A (en) | Cathode-ray tube of electromagnetic focusing type | |
GB1270691A (en) | Microwave tube apparatus | |
JP3652927B2 (en) | Insertion light source with radiation resistance | |
JPS52103966A (en) | Deflection unit for charged particle ray exposure device | |
JPS5448151A (en) | Straight-going beam type multi-cavity klystron | |
JPS56156633A (en) | Manufacture and manufacturing device for color picture tube | |
JPS5514606A (en) | Color picture tube | |
JPS5588250A (en) | Electron beam convergence device | |
JPS5537715A (en) | Cathode ray tube electron gun | |
KR0140009Y1 (en) | Collection coil of elecro collection type cathode ray tube | |
JPS62104122A (en) | Electron-beam transfer apparatus | |
JPS5593639A (en) | Electromagnetic focussing cathode ray tube | |
JPS57149984A (en) | Charged particle detector | |
JPS52116015A (en) | Deflecting coil unit of cathode ray tube | |
GB890843A (en) | Electron tube magnetic focussing device |