GB564003A - Electron lens - Google Patents

Electron lens

Info

Publication number
GB564003A
GB564003A GB6584/43A GB658443A GB564003A GB 564003 A GB564003 A GB 564003A GB 6584/43 A GB6584/43 A GB 6584/43A GB 658443 A GB658443 A GB 658443A GB 564003 A GB564003 A GB 564003A
Authority
GB
United Kingdom
Prior art keywords
ratio
cathode
focal length
electron lens
electron
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
GB6584/43A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB564003A publication Critical patent/GB564003A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • X-Ray Techniques (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

564,003. Electron lenses. STANDARD TELEPHONES & CABLES, Ltd. April 30, 1943, No. 6854. Convention date, May 7, 1942. [Class 39 (i)] An electron lens of small diameter and great focal length comprises two cylinders 5, 6 of equal diameter D spaced apart axially a distance S such that the ratio S/D is greater than a quarter. Preferably, the ratio is between 0.5 and 3.0, the most useful range being 0.75 to 1.25 including the value unity. The positive potential V2 applied to 6 may be between 1 and 10 times, preferably less than 5 times, that (V1) applied to 5. The other elements of the cathode-ray tube shown are cathode 1, heat shield 2, concentrating electrode 4 and anode 3, electrodes 3, 4, 5 and 6 being supported on insulating rods 7, 8. The relation between the focal length, the magnification and the voltage ratio V2/V1 is shown graphically.
GB6584/43A 1942-05-07 1943-04-30 Electron lens Expired GB564003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US442129A US2383751A (en) 1942-05-07 1942-05-07 Electron lens

Publications (1)

Publication Number Publication Date
GB564003A true GB564003A (en) 1944-09-08

Family

ID=23755654

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6584/43A Expired GB564003A (en) 1942-05-07 1943-04-30 Electron lens

Country Status (2)

Country Link
US (1) US2383751A (en)
GB (1) GB564003A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436264A (en) * 1945-06-14 1948-02-17 Kreisler Mfg Corp Jacques Electron gun for cathode-ray tubes
US2597363A (en) * 1951-06-29 1952-05-20 Ibm Cathode-ray storage tube
US2769115A (en) * 1951-08-20 1956-10-30 Russell J Callender Method and means for producing high degree television picture brilliance
US2837691A (en) * 1955-08-24 1958-06-03 Kaiser Ind Corp Electronic device
NL271321A (en) * 1960-11-14
US3215890A (en) * 1961-05-22 1965-11-02 Zenith Radio Corp Electron gun structure for producing an electron beam free of radial velocity components wherein the length of the first non-magnetic cylinder is approximately equal to an integral number of wave lengths of the scallop frequency
US3394279A (en) * 1967-03-23 1968-07-23 Kentucky Electronics Inc Support and electrical connection for grid cup in electron gun
US3501673A (en) * 1968-04-29 1970-03-17 Stromberg Datagraphix Inc Variable magnification cathode ray tube
DE1948153A1 (en) * 1969-09-23 1971-04-01 Siemens Ag Electron beam tube as a writing tube
US3740607A (en) * 1971-06-03 1973-06-19 Watkins Johnson Co Laminar flow electron gun and method
NL7115320A (en) * 1971-11-06 1973-05-08

Also Published As

Publication number Publication date
US2383751A (en) 1945-08-28

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