JPS5541656A - Electromagnetic focussing cathod ray tube - Google Patents
Electromagnetic focussing cathod ray tubeInfo
- Publication number
- JPS5541656A JPS5541656A JP11465578A JP11465578A JPS5541656A JP S5541656 A JPS5541656 A JP S5541656A JP 11465578 A JP11465578 A JP 11465578A JP 11465578 A JP11465578 A JP 11465578A JP S5541656 A JPS5541656 A JP S5541656A
- Authority
- JP
- Japan
- Prior art keywords
- protruding part
- magnetic
- magnetic field
- point end
- approaches
- 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 obtain a high resolution with a less spherical aberration, by such dimensional construction that, radial thickness of the cylindrical protruding part, surrounding an electron beam passing hole of the magnetic yoke, be made thicker at the basic unit side and made thinner as it approaces the point end.
CONSTITUTION: Because the radial thickness of a cylindrical shape protruding part 3a of a magnetic yoke 2 is made thick in the basic part and becoming thinner as it approaches the point end, a magnetic field 7 produced between the facing protruding parts 3a is distributed as shown by a broken line 8 in the drawing. That is, as the protruding part 3a approaches the point end from the basic part, a number of magnetic flux, leaked into outside vacuum from the cylindrical shape protruding part made of magnetic substance, gradually increases. Accordingly, both of a magnetic field component Bz in the tube axis direction and a magnetic field cmponent Bγ in the radial direction are widened the working region, further with the beam gradually collected, and a spherical aberration is reduced with a high resolution obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11465578A JPS5541656A (en) | 1978-09-20 | 1978-09-20 | Electromagnetic focussing cathod ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11465578A JPS5541656A (en) | 1978-09-20 | 1978-09-20 | Electromagnetic focussing cathod ray tube |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5541656A true JPS5541656A (en) | 1980-03-24 |
JPS6122410B2 JPS6122410B2 (en) | 1986-05-31 |
Family
ID=14643233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11465578A Granted JPS5541656A (en) | 1978-09-20 | 1978-09-20 | Electromagnetic focussing cathod ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5541656A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0073472A2 (en) * | 1981-09-02 | 1983-03-09 | Kabushiki Kaisha Toshiba | Magnetic focusing type cathode ray tube |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3026522U (en) * | 1995-12-31 | 1996-07-16 | 茂樹 佐野 | Tiller cover for cultivator |
-
1978
- 1978-09-20 JP JP11465578A patent/JPS5541656A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0073472A2 (en) * | 1981-09-02 | 1983-03-09 | Kabushiki Kaisha Toshiba | Magnetic focusing type cathode ray tube |
EP0073472B1 (en) * | 1981-09-02 | 1987-01-28 | Kabushiki Kaisha Toshiba | Magnetic focusing type cathode ray tube |
Also Published As
Publication number | Publication date |
---|---|
JPS6122410B2 (en) | 1986-05-31 |
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