JPS5541656A - Electromagnetic focussing cathod ray tube - Google Patents

Electromagnetic focussing cathod ray tube

Info

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
Application number
JP11465578A
Other languages
Japanese (ja)
Other versions
JPS6122410B2 (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 JP11465578A priority Critical patent/JPS5541656A/en
Publication of JPS5541656A publication Critical patent/JPS5541656A/en
Publication of JPS6122410B2 publication Critical patent/JPS6122410B2/ja
Granted legal-status Critical Current

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
JP11465578A 1978-09-20 1978-09-20 Electromagnetic focussing cathod ray tube Granted JPS5541656A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3026522U (en) * 1995-12-31 1996-07-16 茂樹 佐野 Tiller cover for cultivator

Cited By (2)

* Cited by examiner, † Cited by third party
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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