GB647703A - Improvements in and relating to electron lens systems - Google Patents

Improvements in and relating to electron lens systems

Info

Publication number
GB647703A
GB647703A GB20729/44A GB2072944A GB647703A GB 647703 A GB647703 A GB 647703A GB 20729/44 A GB20729/44 A GB 20729/44A GB 2072944 A GB2072944 A GB 2072944A GB 647703 A GB647703 A GB 647703A
Authority
GB
United Kingdom
Prior art keywords
points
insulator
cylinder
contact
oct
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
GB20729/44A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 claimed from US537273A external-priority patent/US2420514A/en
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB647703A publication Critical patent/GB647703A/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
    • H01J37/06—Electron sources; Electron guns
    • H01J37/067—Replacing parts of guns; Mutual adjustment of electrodes
    • 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
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • 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
    • 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
    • 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
    • H01J37/06—Electron sources; Electron guns
    • H01J37/065—Construction of guns or parts thereof
    • 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
    • H01J37/12—Lenses electrostatic
    • 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
    • H01J37/18—Vacuum locks ; Means for obtaining or maintaining the desired pressure within the vessel
    • 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
    • H01J37/20—Means for supporting or positioning the objects or the material; Means for adjusting diaphragms or lenses associated with the support
    • 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
    • H01J37/24—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

647,703. Electron lenses. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 25, 1944, No. 20729. Convention date, Oct. 25, 1943. [Class 39 (i)] In a three-element electron lens for an electron microscope, comprising two outer discs 10, 12, Fig. 2, fitting within and in conductive contact with a metallic cylinder 18, and an insulated inner disc 11 supported by an insulator contacting the cylinder and spaced from the outer discs by cylindrical spacers 22, 23, the said insulator 30, Fig. 4, is arranged to contact the inner element at a plurality of spaced points so as to reduce insulation losses. As shown, the insulator 30 is a bent vitreous rod engaging the inner member at points 31 and the cylinder 18 at ground-off points 32. In a modification, contact is still further reduced by forming the rod at points 31 with portions of sharper radius.
GB20729/44A 1942-12-01 1944-10-25 Improvements in and relating to electron lens systems Expired GB647703A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US467530A US2424788A (en) 1942-12-01 1942-12-01 Electron microscope
US507557A US2400331A (en) 1942-12-01 1943-10-25 Electron lens system
US519774A US2424791A (en) 1942-12-01 1944-01-26 Electron microscope apparatus
US519772A US2424789A (en) 1942-12-01 1944-01-26 Electron microscope
US519773A US2424790A (en) 1942-12-01 1944-01-26 Electron microscope
US537273A US2420514A (en) 1944-05-25 1944-05-25 Electron lens structure

Publications (1)

Publication Number Publication Date
GB647703A true GB647703A (en) 1950-12-20

Family

ID=32180838

Family Applications (3)

Application Number Title Priority Date Filing Date
GB19991/43A Expired GB576003A (en) 1942-12-01 1943-11-30 Improvements in and relating to electron microscopes
GB20729/44A Expired GB647703A (en) 1942-12-01 1944-10-25 Improvements in and relating to electron lens systems
GB12895/45A Expired GB669381A (en) 1942-12-01 1945-05-23 Improvements in and relating to electrostatic electron lens structures

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB19991/43A Expired GB576003A (en) 1942-12-01 1943-11-30 Improvements in and relating to electron microscopes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB12895/45A Expired GB669381A (en) 1942-12-01 1945-05-23 Improvements in and relating to electrostatic electron lens structures

Country Status (4)

Country Link
US (5) US2424788A (en)
BE (4) BE576003A (en)
FR (3) FR938893A (en)
GB (3) GB576003A (en)

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CH265966A (en) * 1946-10-04 1949-12-31 Csf Sealed disc electronic discharge tube comprising an axially adjustable emissive cathode.
FR937296A (en) * 1947-06-21 1948-08-12 Csf Improvements to focusing devices, for electron microscopes
US2628996A (en) * 1949-01-21 1953-02-17 Western Electric Co Extensible folded terminal for electrical coils
US2817035A (en) * 1954-04-26 1957-12-17 Hughes Aircraft Co Brillouin flow electron gun
US2877286A (en) * 1955-06-13 1959-03-10 Cs 13 Corp Radiant energy shielding device
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US3292041A (en) * 1962-07-02 1966-12-13 Hitachi Ltd Multistage type high voltage electron gun with controllable electrode spacing
US3182175A (en) * 1962-09-24 1965-05-04 Nat Res Corp Electron beam heating device
US3614422A (en) * 1969-08-01 1971-10-19 Hitachi Ltd Surge reduction resistors between a high-voltage source and an electron microscope electron gun
US3982058A (en) * 1975-05-13 1976-09-21 The United States Of America As Represented By The Secretary Of The Navy Magnetic and electric field shielding of computer components from lightning
US3961220A (en) * 1975-05-16 1976-06-01 Gte Sylvania Incorporated Snubber means for positioning a gun structure in an electron discharge device
FR2417179A1 (en) * 1978-02-08 1979-09-07 Hitachi Ltd ELECTRONIC CANNON WITH FIELD EMISSION
US4196371A (en) * 1978-04-05 1980-04-01 Tektronix, Inc. Shock-absorbing means for mesh-carrying member of a cathode ray tube
US4359664A (en) * 1980-07-02 1982-11-16 North American Philips Consumer Electronics Corp. Method of mounting a cathode and eyelet for use therewith
US4446374A (en) * 1982-01-04 1984-05-01 Ivanov Andrei S Electron beam accelerator
US5376792A (en) * 1993-04-26 1994-12-27 Rj Lee Group, Inc. Scanning electron microscope
WO2007070475A2 (en) * 2005-12-12 2007-06-21 Kla-Tencor Technologies Corporation Scanning electron microscope with crt-type electron optics
US20070145266A1 (en) * 2005-12-12 2007-06-28 Avi Cohen Electron microscope apparatus using CRT-type optics
US20070145267A1 (en) * 2005-12-12 2007-06-28 Adler David L Portable scanning electron microscope
US8507876B2 (en) * 2010-03-08 2013-08-13 Microscopy Innovations, Llc Device for holding electron microscope grids and other materials
JP6573835B2 (en) * 2016-01-12 2019-09-11 株式会社荏原製作所 Inspection apparatus and high-pressure reference pipe manufacturing method

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US2132076A (en) * 1938-10-04 Fluos
US1836829A (en) * 1928-04-17 1931-12-15 Bell Telephone Labor Inc Electric discharge device
US2227189A (en) * 1928-12-12 1940-12-31 Rca Corp Cathode-ray oscillograph
US2036532A (en) * 1928-12-12 1936-04-07 Knoll Cathode-ray-oscillograph
DE906737C (en) * 1931-05-31 1954-03-18 Siemens Ag Arrangement for enlarged imaging of objects by means of electron beams
US2062243A (en) * 1931-12-24 1936-11-24 New York Central Railroad Co Auto boxcar
US2075141A (en) * 1932-03-24 1937-03-30 Schlesinger Kurt Cathode ray tube system
US2227033A (en) * 1932-04-04 1940-12-31 Loewe Radio Inc Electron optical system
US2147372A (en) * 1935-03-14 1939-02-14 Telefunken Gmbh Cathode ray tube
BE426509A (en) * 1937-02-22
GB493790A (en) * 1937-04-30 1938-10-14 British Thomson Houston Co Ltd Improvements in or relating to cathode ray devices
NL53220C (en) * 1937-07-07
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US2227034A (en) * 1937-08-30 1940-12-31 Loewe Radio Inc Cathode ray tube
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US2234281A (en) * 1938-02-10 1941-03-11 Fides Gmbh Shielded electron microscope
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US2360872A (en) * 1943-09-25 1944-10-24 Rca Corp Electron optical instrument

Also Published As

Publication number Publication date
FR938893A (en) 1948-10-27
US2424789A (en) 1947-07-29
BE483238A (en)
FR58024E (en) 1953-09-21
GB576003A (en) 1946-03-14
BE576003A (en)
GB669381A (en) 1952-04-02
US2400331A (en) 1946-05-14
FR964837A (en) 1950-08-25
BE474126A (en)
BE480179A (en)
US2424790A (en) 1947-07-29
US2424788A (en) 1947-07-29
US2424791A (en) 1947-07-29

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