US2849636A - Magnetic electron lens - Google Patents

Magnetic electron lens Download PDF

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Publication number
US2849636A
US2849636A US322962A US32296252A US2849636A US 2849636 A US2849636 A US 2849636A US 322962 A US322962 A US 322962A US 32296252 A US32296252 A US 32296252A US 2849636 A US2849636 A US 2849636A
Authority
US
United States
Prior art keywords
magnets
magnetic
magnet
focusing
electron
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 - Lifetime
Application number
US322962A
Other languages
English (en)
Inventor
Verhoef Johan Anton
Amesz Wilhelm Godfried
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2849636A publication Critical patent/US2849636A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

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  • Electron Beam Exposure (AREA)
US322962A 1952-01-04 1952-11-28 Magnetic electron lens Expired - Lifetime US2849636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL310959X 1952-01-04

Publications (1)

Publication Number Publication Date
US2849636A true US2849636A (en) 1958-08-26

Family

ID=19783636

Family Applications (1)

Application Number Title Priority Date Filing Date
US322962A Expired - Lifetime US2849636A (en) 1952-01-04 1952-11-28 Magnetic electron lens

Country Status (7)

Country Link
US (1) US2849636A (nl)
BE (1) BE516722A (nl)
CH (1) CH310959A (nl)
DE (1) DE976927C (nl)
FR (1) FR1069392A (nl)
GB (1) GB729840A (nl)
NL (2) NL166477B (nl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324433A (en) * 1963-12-27 1967-06-06 Hitachi Ltd Electron lens system excited by at least one permanent magnet
US3387158A (en) * 1965-04-14 1968-06-04 Sony Corp Focus magnet assembly for cathode ray tubes
CN103890442A (zh) * 2011-09-10 2014-06-25 本田技研工业株式会社 变阻尼力阻尼器
US11483919B2 (en) * 2019-03-27 2022-10-25 Huazhong University Of Science And Technology System of electron irradiation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354336A (en) * 1965-06-30 1967-11-21 Zenith Radio Corp Ring magnetized across thickness with two diametrically opposed and oppositely oriented groups of magnetic pole pairs
NL7812540A (nl) * 1978-12-27 1980-07-01 Philips Nv Kathodestraalbuis.
NL8700528A (nl) * 1987-03-05 1988-10-03 Philips Nv Magnetische focusseerlens voor een kathodestraalbuis.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582788A (en) * 1949-02-01 1952-01-15 Gen Electric Magnetic suspension for horizontal shafts
US2615738A (en) * 1950-03-18 1952-10-28 Bailey Meter Co Linkage connector
US2678729A (en) * 1950-12-12 1954-05-18 Spodig Heinrich Automatically operative magnetic separator
US2714678A (en) * 1950-09-03 1955-08-02 Siemens Ag Electron microscopes
US2722617A (en) * 1951-11-28 1955-11-01 Hartford Nat Bank & Trust Comp Magnetic circuits and devices
US2799813A (en) * 1954-03-05 1957-07-16 Philips Corp Magnetic electron lens

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2102421A (en) * 1934-07-12 1937-12-14 Gen Electric Cathode ray oscillograph
FR796502A (fr) * 1934-10-19 1936-04-09 Fernseh Ag Aimant maintenant le rayon rectiligne dans les tubes de braun
DE682031C (de) * 1936-09-11 1939-10-06 Aeg Rotationssymmetrische magnetische Elektronenlinse aus Dauermagneten
DE720927C (de) * 1937-02-25 1942-05-19 Telefunken Gmbh Magnetische Elektronenlinse
DE688644C (de) * 1937-05-29 1940-02-27 Aeg r koaxialen Teillinsen besteht
GB522377A (en) * 1938-12-07 1940-06-17 Ferranti Ltd Improvements in or relating to focusing systems for electron beams
DE758548C (de) * 1939-02-10 1953-05-26 Telefunken Gmbh Magnetische Elektronenlinse ohne Bilddrehung
NL147275B (nl) * 1948-07-01 Plessey Uk Limited Elektrische momentschakelaar voor drukknopbediening.
US2564737A (en) * 1949-12-23 1951-08-21 Rauland Corp Cathode-ray tube
US2565533A (en) * 1950-05-19 1951-08-28 Rauland Corp Cathode-ray tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582788A (en) * 1949-02-01 1952-01-15 Gen Electric Magnetic suspension for horizontal shafts
US2615738A (en) * 1950-03-18 1952-10-28 Bailey Meter Co Linkage connector
US2714678A (en) * 1950-09-03 1955-08-02 Siemens Ag Electron microscopes
US2678729A (en) * 1950-12-12 1954-05-18 Spodig Heinrich Automatically operative magnetic separator
US2722617A (en) * 1951-11-28 1955-11-01 Hartford Nat Bank & Trust Comp Magnetic circuits and devices
US2799813A (en) * 1954-03-05 1957-07-16 Philips Corp Magnetic electron lens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324433A (en) * 1963-12-27 1967-06-06 Hitachi Ltd Electron lens system excited by at least one permanent magnet
US3387158A (en) * 1965-04-14 1968-06-04 Sony Corp Focus magnet assembly for cathode ray tubes
CN103890442A (zh) * 2011-09-10 2014-06-25 本田技研工业株式会社 变阻尼力阻尼器
CN103890442B (zh) * 2011-09-10 2015-12-02 本田技研工业株式会社 变阻尼力阻尼器
US11483919B2 (en) * 2019-03-27 2022-10-25 Huazhong University Of Science And Technology System of electron irradiation

Also Published As

Publication number Publication date
FR1069392A (fr) 1954-07-07
BE516722A (nl)
GB729840A (en) 1955-05-11
DE976927C (de) 1964-08-06
NL87342C (nl)
NL166477B (nl)
CH310959A (de) 1955-11-15

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