GB699830A - Improvements in magnetic electron lenses - Google Patents

Improvements in magnetic electron lenses

Info

Publication number
GB699830A
GB699830A GB3718/51A GB371851A GB699830A GB 699830 A GB699830 A GB 699830A GB 3718/51 A GB3718/51 A GB 3718/51A GB 371851 A GB371851 A GB 371851A GB 699830 A GB699830 A GB 699830A
Authority
GB
United Kingdom
Prior art keywords
pole pieces
electron lenses
magnetic
magnetic electron
rods
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
GB3718/51A
Inventor
Richard Stockbridge Page
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co 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
Priority to US2637000D priority Critical patent/US2637000A/en
Application filed by Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB3718/51A priority patent/GB699830A/en
Publication of GB699830A publication Critical patent/GB699830A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/153—Electron-optical or ion-optical arrangements for the correction of image defects, e.g. stigmators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/10—Lenses
    • H01J37/14—Lenses magnetic
    • H01J37/141—Electromagnetic lenses

Abstract

699,830. Cathode-ray tubes. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Jan. 11, 1952 [Feb. 15, 1951], No. 3718/51. Class 39(i) A magnetic lens for electron microscopes and diffraction cameras is formed by one end cheek 1 of the winding bobbin 2 which is sealed to the envelope and is drilled with radial holes which extend into a non-magnetic spacer 4 between the pole pieces 5, 7 but do not penetrate the vacuum space, the field between the pole pieces being adjusted by the screwed axial rods 9 at least the inner ends of which are formed of soft iron. Eight rods symmetrically arranged may be provided.
GB3718/51A 1951-02-15 1951-02-15 Improvements in magnetic electron lenses Expired GB699830A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US2637000D US2637000A (en) 1951-02-15 Magnetic electron -lens
GB3718/51A GB699830A (en) 1951-02-15 1951-02-15 Improvements in magnetic electron lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3718/51A GB699830A (en) 1951-02-15 1951-02-15 Improvements in magnetic electron lenses

Publications (1)

Publication Number Publication Date
GB699830A true GB699830A (en) 1953-11-18

Family

ID=9763652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3718/51A Expired GB699830A (en) 1951-02-15 1951-02-15 Improvements in magnetic electron lenses

Country Status (2)

Country Link
US (1) US2637000A (en)
GB (1) GB699830A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748945A (en) * 1949-08-12 1956-05-16 Standard Telephones Cables Ltd Improvements in or relating to electron discharge tubes
US2730641A (en) * 1953-06-11 1956-01-10 United States Steel Corp Magnetic compensator
NL194113A (en) * 1954-01-22
US3643191A (en) * 1969-06-13 1972-02-15 Hitachi Ltd Electron lens for electron microscope and the like
US3984687A (en) * 1975-03-17 1976-10-05 International Business Machines Corporation Shielded magnetic lens and deflection yoke structure for electron beam column
JPH0760661B2 (en) * 1988-07-22 1995-06-28 株式会社日立製作所 electronic microscope
US5629526A (en) * 1993-09-28 1997-05-13 Nikon Corporation Electro-magnetic lens, charged particle beam transferring apparatus, and method for manufacturing electro-magnetic lens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438971A (en) * 1946-10-31 1948-04-06 Rca Corp Compound electron objective lens
US2513221A (en) * 1948-07-01 1950-06-27 Rca Corp Register correction for television

Also Published As

Publication number Publication date
US2637000A (en) 1953-04-28

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