JPH0138351B2 - - Google Patents

Info

Publication number
JPH0138351B2
JPH0138351B2 JP54065776A JP6577679A JPH0138351B2 JP H0138351 B2 JPH0138351 B2 JP H0138351B2 JP 54065776 A JP54065776 A JP 54065776A JP 6577679 A JP6577679 A JP 6577679A JP H0138351 B2 JPH0138351 B2 JP H0138351B2
Authority
JP
Japan
Prior art keywords
permanent magnet
ring
shaped permanent
magnetic field
magnet
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.)
Expired
Application number
JP54065776A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55157845A (en
Inventor
Teruo Umehara
Norio Matsumoto
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP6577679A priority Critical patent/JPS55157845A/ja
Publication of JPS55157845A publication Critical patent/JPS55157845A/ja
Publication of JPH0138351B2 publication Critical patent/JPH0138351B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only
JP6577679A 1979-05-28 1979-05-28 Focusing magnet Granted JPS55157845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6577679A JPS55157845A (en) 1979-05-28 1979-05-28 Focusing magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6577679A JPS55157845A (en) 1979-05-28 1979-05-28 Focusing magnet

Publications (2)

Publication Number Publication Date
JPS55157845A JPS55157845A (en) 1980-12-08
JPH0138351B2 true JPH0138351B2 (en]) 1989-08-14

Family

ID=13296766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6577679A Granted JPS55157845A (en) 1979-05-28 1979-05-28 Focusing magnet

Country Status (1)

Country Link
JP (1) JPS55157845A (en])

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51118363A (en) * 1975-04-11 1976-10-18 Hitachi Ltd Permanent magnet lens system

Also Published As

Publication number Publication date
JPS55157845A (en) 1980-12-08

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