GB655966A - Improvements in or relating to electrostatic electron lens systems - Google Patents

Improvements in or relating to electrostatic electron lens systems

Info

Publication number
GB655966A
GB655966A GB31955/48A GB3195548A GB655966A GB 655966 A GB655966 A GB 655966A GB 31955/48 A GB31955/48 A GB 31955/48A GB 3195548 A GB3195548 A GB 3195548A GB 655966 A GB655966 A GB 655966A
Authority
GB
United Kingdom
Prior art keywords
electron
pencils
electrodes
relating
electron 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
GB31955/48A
Inventor
Bernard Joseph Mayo
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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
Priority to NL696912544A priority Critical patent/NL150232B/en
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB31955/48A priority patent/GB655966A/en
Priority to FR1001051D priority patent/FR1001051A/en
Priority to DEE373A priority patent/DE809449C/en
Priority to US134005A priority patent/US2539370A/en
Publication of GB655966A publication Critical patent/GB655966A/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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/501—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electrostatic electron optic system

Abstract

655,966. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Dec. 10, 1948, No. 31955. [Class 39 (i)] An electron-optical system for focusing a composite electron beam produced by a plane source, such as a photocathode 9, comprises an electron lens having tubular electrodes 10... 13 and producing a field 15 causing the electron pencils 16 to converge, and a second lens, comprising electrodes 13, 14, which focus the pencils 16 on or near a target or fluorescent screen 4. By giving electrode 14 a positive potential which is less than 0.4 of the potential applied to electrode 13, the focus points 18 of the pencils are formed near the screen 4 and so the curvature of the image is reduced. Examples of the sizes of the electrodes and of the potentials are given.
GB31955/48A 1948-12-10 1948-12-10 Improvements in or relating to electrostatic electron lens systems Expired GB655966A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL696912544A NL150232B (en) 1948-12-10 METHOD OF DETERMINING THE (ALPHA) AMYLASE ACTIVITY OF A MATERIAL OF HUMAN OR ANIMAL ORIGIN, AND REAGENTIA FOR THIS.
GB31955/48A GB655966A (en) 1948-12-10 1948-12-10 Improvements in or relating to electrostatic electron lens systems
FR1001051D FR1001051A (en) 1948-12-10 1949-12-06 Electrostatic Electronic Lens Device
DEE373A DE809449C (en) 1948-12-10 1949-12-09 Electrostatic electron lens system
US134005A US2539370A (en) 1948-12-10 1949-12-20 Electrostatic electron lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31955/48A GB655966A (en) 1948-12-10 1948-12-10 Improvements in or relating to electrostatic electron lens systems

Publications (1)

Publication Number Publication Date
GB655966A true GB655966A (en) 1951-08-08

Family

ID=10330866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31955/48A Expired GB655966A (en) 1948-12-10 1948-12-10 Improvements in or relating to electrostatic electron lens systems

Country Status (5)

Country Link
US (1) US2539370A (en)
DE (1) DE809449C (en)
FR (1) FR1001051A (en)
GB (1) GB655966A (en)
NL (1) NL150232B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859377A (en) * 1955-09-21 1958-11-04 John E Clemens Electronic high speed shutter
NL288559A (en) * 1962-05-14
NL7115320A (en) * 1971-11-06 1973-05-08
NL8304444A (en) * 1983-12-27 1985-07-16 Philips Nv PICTURE TUBE.
CN104902358B (en) * 2015-06-08 2019-01-18 歌尔股份有限公司 A kind of loudspeaker mould group

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB429854A (en) * 1934-03-19 1935-06-07 James Dwyer Mcgee Improvements in or relating to cathode ray tubes
US2131185A (en) * 1935-03-01 1938-09-27 Telefunken Gmbh Electrooptical device
US2189321A (en) * 1936-10-28 1940-02-06 Rca Corp Electro-optical device
GB489428A (en) * 1936-12-24 1938-07-25 Frederick Hermes Nicoll Improvements in or relating to electron mirrors
US2185378A (en) * 1937-06-26 1940-01-02 Rca Corp Electron gun for cathode ray tubes
BE428830A (en) * 1937-06-29
US2320582A (en) * 1939-11-08 1943-06-01 Flechsig Werner Cathode ray tube

Also Published As

Publication number Publication date
DE809449C (en) 1951-07-30
US2539370A (en) 1951-01-23
NL150232B (en)
FR1001051A (en) 1952-02-19

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