NL92251C - - Google Patents

Info

Publication number
NL92251C
NL92251C NL92251DA NL92251C NL 92251 C NL92251 C NL 92251C NL 92251D A NL92251D A NL 92251DA NL 92251 C NL92251 C NL 92251C
Authority
NL
Netherlands
Application number
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.)
Publication of NL92251C publication Critical patent/NL92251C/xx

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
    • H01J37/143—Permanent magnetic lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0015—Non-sealed electrodes
    • H01J2893/0018—Bar or cage-like grids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Beam Exposure (AREA)
  • Particle Accelerators (AREA)
  • Lens Barrels (AREA)
NL92251D 1948-10-01 NL92251C (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP12132A DE857991C (de) 1948-10-01 1948-10-01 Mit permanentmagnetischer Erregung arbeitende Elektronenlinse

Publications (1)

Publication Number Publication Date
NL92251C true NL92251C (fr)

Family

ID=25784630

Family Applications (1)

Application Number Title Priority Date Filing Date
NL92251D NL92251C (fr) 1948-10-01

Country Status (5)

Country Link
US (1) US2804548A (fr)
CH (1) CH301200A (fr)
DE (2) DE857991C (fr)
GB (1) GB722096A (fr)
NL (1) NL92251C (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928004A (en) * 1954-08-27 1960-03-08 Hitachi Ltd Three stage electron lens system excited by permanent magnets
DE1035813B (de) * 1956-01-13 1958-08-07 Siemens Ag Linsenanordnung fuer Elektronenmikroskope od. dgl.
NL214979A (fr) * 1956-03-01
US2945153A (en) * 1956-08-31 1960-07-12 Rca Corp Electron beam tube
US2939994A (en) * 1957-01-28 1960-06-07 Westinghouse Electric Corp Electron discharge device
JPS547236A (en) * 1977-06-20 1979-01-19 Hitachi Ltd High-resolution cathode-ray tube
US4359706A (en) * 1979-12-18 1982-11-16 Arnold Flack Magnet pole pieces and pole piece extensions and shields

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2163157A (en) * 1937-07-22 1939-06-20 Bell Telephone Labor Inc Electron discharge apparatus
DE973258C (de) * 1938-03-08 1959-12-31 Siemens Ag Magnetische Polschuhlinse kleiner Brennweite fuer elektronenoptische Vergroesserungen in Elektronenmikroskopen
US2369796A (en) * 1943-03-26 1945-02-20 Rca Corp Electron lens system
NL89013C (fr) * 1944-05-31
US2503173A (en) * 1946-10-18 1950-04-04 Rca Corp Permanent magnetic electron lens system
US2533687A (en) * 1949-05-27 1950-12-12 Quam Nichols Company Magnetic focusing device
GB680300A (en) * 1950-02-23 1952-10-01 Vickers Electrical Co Ltd Improvements relating to magnetic electron lenses

Also Published As

Publication number Publication date
DE857991C (de) 1956-01-12
GB722096A (en) 1955-01-19
DE891307C (de) 1956-08-23
CH301200A (de) 1954-08-31
US2804548A (en) 1957-08-27

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