GB1040334A - Improvements in or relating to electrostatically focused electron discharge tubes - Google Patents

Improvements in or relating to electrostatically focused electron discharge tubes

Info

Publication number
GB1040334A
GB1040334A GB12005/62A GB1200562A GB1040334A GB 1040334 A GB1040334 A GB 1040334A GB 12005/62 A GB12005/62 A GB 12005/62A GB 1200562 A GB1200562 A GB 1200562A GB 1040334 A GB1040334 A GB 1040334A
Authority
GB
United Kingdom
Prior art keywords
cathode
mesh
tube
cross
electrode
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
GB12005/62A
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
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB12005/62A priority Critical patent/GB1040334A/en
Priority to DE19631464566 priority patent/DE1464566A1/en
Priority to US268741A priority patent/US3308335A/en
Publication of GB1040334A publication Critical patent/GB1040334A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/08—Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted or stored, e.g. backing-plates for storage tubes or collecting secondary electrons
    • 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

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Microwave Tubes (AREA)

Abstract

1,040,334. Image-converter tubes. ELECTRIC & MUSICAL INDUSTRIES Ltd. March 25, 1963 [March 29, 1962], No. 12005/62. Heading H1D. In an image-converter tube a planar photoelectron emissive cathode 1 has closely spaced therefrom a fine pitch mesh 2 of mutually perpendicular filaments, connected at the periphery to a short cylindrical electrode 3 to form an auxiliary focusing arrangement. Cylindrical focusing electrodes 4, 5, 6, 7 are spaced along the tube between the cathode and a luminescent screen 8 and energized at increasing potential to cause the principle rays of electrons to cross the axis of the tube to produce an inverted image on the screen. The auxiliary focusing arrangement causes the marginal rays to cross the axis further from the cathode and closer to the point where the axial rays cross. The electrode 3 may be conically shaped and may be maintained at a different potential from the mesh 2. In another embodiment, Fig. 4, not shown, the mesh is closer spaced to the cathode and the electrode 3 is not used.
GB12005/62A 1962-03-29 1962-03-29 Improvements in or relating to electrostatically focused electron discharge tubes Expired GB1040334A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB12005/62A GB1040334A (en) 1962-03-29 1962-03-29 Improvements in or relating to electrostatically focused electron discharge tubes
DE19631464566 DE1464566A1 (en) 1962-03-29 1963-03-28 Electron-optical tubes with a flat photocathode
US268741A US3308335A (en) 1962-03-29 1963-03-28 Electrostatically focussed electron image tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12005/62A GB1040334A (en) 1962-03-29 1962-03-29 Improvements in or relating to electrostatically focused electron discharge tubes

Publications (1)

Publication Number Publication Date
GB1040334A true GB1040334A (en) 1966-08-24

Family

ID=9996682

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12005/62A Expired GB1040334A (en) 1962-03-29 1962-03-29 Improvements in or relating to electrostatically focused electron discharge tubes

Country Status (3)

Country Link
US (1) US3308335A (en)
DE (1) DE1464566A1 (en)
GB (1) GB1040334A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1468746A (en) * 1965-07-19 1967-02-10 Thomson Houston Comp Francaise Image converter device comprising a variable-magnification electronic optical device
GB1165002A (en) * 1965-09-25 1969-09-24 Emi Ltd Improvements relating to Cathode Ray Tubes and Focusing and Deflecting Arrangements Therefor.
US3443104A (en) * 1966-02-17 1969-05-06 Rauland Corp Image intensifier tube with shading compensation
US3919588A (en) * 1972-10-02 1975-11-11 Gen Electric Two-aperture immersion lens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB515301A (en) * 1938-03-29 1939-12-01 Hans Gerhard Lubszynski Improvements in or relating to photo electric devices
NL209270A (en) * 1955-07-26

Also Published As

Publication number Publication date
US3308335A (en) 1967-03-07
DE1464566A1 (en) 1969-05-08

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