FR841823A - Lentille magnétique avec système polaire asymétrique - Google Patents

Lentille magnétique avec système polaire asymétrique

Info

Publication number
FR841823A
FR841823A FR841823DA FR841823A FR 841823 A FR841823 A FR 841823A FR 841823D A FR841823D A FR 841823DA FR 841823 A FR841823 A FR 841823A
Authority
FR
France
Prior art keywords
magnetic lens
polar system
asymmetric polar
asymmetric
lens
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
Other languages
English (en)
French (fr)
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.)
Fides BV
Original Assignee
Fides BV
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 Fides BV filed Critical Fides BV
Application granted granted Critical
Publication of FR841823A publication Critical patent/FR841823A/fr
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 or ion-optical arrangement
    • H01J37/10—Lenses
    • H01J37/14—Lenses magnetic
    • H01J37/141—Electromagnetic lenses

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Beam Exposure (AREA)
  • Eyeglasses (AREA)
FR841823D 1937-08-16 1938-08-08 Lentille magnétique avec système polaire asymétrique Expired FR841823A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE517680X 1937-08-16

Publications (1)

Publication Number Publication Date
FR841823A true FR841823A (fr) 1939-05-31

Family

ID=6549644

Family Applications (1)

Application Number Title Priority Date Filing Date
FR841823D Expired FR841823A (fr) 1937-08-16 1938-08-08 Lentille magnétique avec système polaire asymétrique

Country Status (4)

Country Link
US (1) US2209669A (enrdf_load_stackoverflow)
BE (1) BE429637A (enrdf_load_stackoverflow)
FR (1) FR841823A (enrdf_load_stackoverflow)
GB (1) GB517680A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759837C (de) * 1940-05-07 1954-06-28 Manfred Von Ardenne Magnetische Linse fuer Elektronenmikroskope mit einem unsymmetrisch zur Spulenmitte liegenden Polschuhsystem

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418432A (en) * 1944-05-01 1947-04-01 Rca Corp Magnetic electron lens system
US2648036A (en) * 1946-03-12 1953-08-04 Us Navy Adjustable focusing coil
US3509503A (en) * 1967-02-27 1970-04-28 Nippon Electron Optics Lab Objective lens pole pieces
US4541890A (en) * 1982-06-01 1985-09-17 International Business Machines Corporation Hall ion generator for working surfaces with a low energy high intensity ion beam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759837C (de) * 1940-05-07 1954-06-28 Manfred Von Ardenne Magnetische Linse fuer Elektronenmikroskope mit einem unsymmetrisch zur Spulenmitte liegenden Polschuhsystem

Also Published As

Publication number Publication date
BE429637A (enrdf_load_stackoverflow)
GB517680A (en) 1940-02-06
US2209669A (en) 1940-07-30

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