GB735272A - Improvements in or relating to adjustable magnetic electron lenses - Google Patents

Improvements in or relating to adjustable magnetic electron lenses

Info

Publication number
GB735272A
GB735272A GB25083/53A GB2508353A GB735272A GB 735272 A GB735272 A GB 735272A GB 25083/53 A GB25083/53 A GB 25083/53A GB 2508353 A GB2508353 A GB 2508353A GB 735272 A GB735272 A GB 735272A
Authority
GB
United Kingdom
Prior art keywords
pole
piece
tube
relating
sept
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
GB25083/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB735272A publication Critical patent/GB735272A/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
    • H01J37/10—Lenses
    • H01J37/14—Lenses magnetic

Abstract

735,272. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 10, 1953 [Sept. 13, 1952], No. 25083/53. Class 39 (1). A magnetic lens for an electron microscope or diffraction device has a movable pole-piece 8 and the vacuous space within the pole-piece is bounded by a small tube 5 of low permeability in the bore of the pole-piece; thus the power of the lens can be adjusted without disturbing the vacuum. The pole-piece 8 is moved by screwed ring 13 and the remainder of the magnetic circuit is shell 1, disc 9 and polepiece 10 which engages the tube 5 in a vacuumtight joint 18; or tube 5 and pole-piece 10 can be made in one piece if the tube is made so thin as to be magnetically saturated. Both pole-pieces may be movable. Specification 711,672 is referred to.
GB25083/53A 1952-09-13 1953-09-10 Improvements in or relating to adjustable magnetic electron lenses Expired GB735272A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL172475 1952-09-13

Publications (1)

Publication Number Publication Date
GB735272A true GB735272A (en) 1955-08-17

Family

ID=19750580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25083/53A Expired GB735272A (en) 1952-09-13 1953-09-10 Improvements in or relating to adjustable magnetic electron lenses

Country Status (7)

Country Link
US (1) US2749464A (en)
BE (1) BE522744A (en)
CH (1) CH316013A (en)
DE (1) DE948799C (en)
FR (1) FR1087977A (en)
GB (1) GB735272A (en)
NL (2) NL91356C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471943A (en) * 2009-07-16 2011-01-19 Vg Systems Ltd Magnetic lens, method for focussing charged particles and charged particle energy analyser

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939994A (en) * 1957-01-28 1960-06-07 Westinghouse Electric Corp Electron discharge device
US3787696A (en) * 1972-03-15 1974-01-22 Etec Corp Scanning electron microscope electron-optical column construction
FR2597259A1 (en) * 1986-04-15 1987-10-16 Thomson Csf ELECTRONIC BEAM DEVICE FOR PROJECTING THE IMAGE OF AN OBJECT ON A SAMPLE
DE102009028013B9 (en) * 2009-07-24 2014-04-17 Carl Zeiss Microscopy Gmbh Particle beam device with a diaphragm unit and method for adjusting a jet stream in a particle beam device
EP3872837A1 (en) 2020-02-25 2021-09-01 The Provost, Fellows, Scholars and other Members of Board of Trinity College Dublin Pole piece for an electron microscope

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB472165A (en) * 1936-03-11 1937-09-13 Ferranti Ltd Improvements in or relating to focusing systems for electron beams
GB494839A (en) * 1937-05-01 1938-11-01 British Thomson Houston Co Ltd Improvements in and relating to cathode ray apparatus
US2295403A (en) * 1940-11-15 1942-09-08 Rca Corp Apertured electron lens and method of alignment
DE898217C (en) * 1943-01-27 1953-11-30 Siemens Ag Arrangement for changing the enlargement achievable with a magnetic electron lens
US2369782A (en) * 1943-04-01 1945-02-20 Rca Corp Electron lens system
NL89013C (en) * 1944-05-31
US2418349A (en) * 1945-12-13 1947-04-01 Rca Corp Method of and means for correcting for distortion in electron lens systems
US2469165A (en) * 1946-10-29 1949-05-03 Rca Corp Correction device for electron lenses
NL147142B (en) * 1948-06-29 Hoffmann La Roche PROCESS FOR THE PREPARATION OF A HYDROCHLORIDE OF A BENZODIAZEPINE DERIVATIVE, PROCEDURE FOR THE PREPARATION OF PREPARATIONS WITH HYPNOGENIC PROPERTIES, AND THE PREPARATION FORMED.
US2567674A (en) * 1949-11-08 1951-09-11 Rca Corp Velocity modulated electron discharge device
US2594099A (en) * 1950-04-22 1952-04-22 Ite Circuit Breaker Ltd Focusing coil for cathode-ray tubes
US2679018A (en) * 1950-06-30 1954-05-18 Rca Corp Magnetic electron lens pole piece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471943A (en) * 2009-07-16 2011-01-19 Vg Systems Ltd Magnetic lens, method for focussing charged particles and charged particle energy analyser
GB2471943B (en) * 2009-07-16 2011-10-19 Vg Systems Ltd Magnetic lens, method for focussing charged particles and charged particle energy analyser

Also Published As

Publication number Publication date
NL92220C (en)
DE948799C (en) 1956-09-06
BE522744A (en)
NL91356C (en)
FR1087977A (en) 1955-03-02
CH316013A (en) 1956-09-15
US2749464A (en) 1956-06-05

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