GB696226A - Improvements in or relating to television pick-up tubes - Google Patents

Improvements in or relating to television pick-up tubes

Info

Publication number
GB696226A
GB696226A GB2408350A GB2408350A GB696226A GB 696226 A GB696226 A GB 696226A GB 2408350 A GB2408350 A GB 2408350A GB 2408350 A GB2408350 A GB 2408350A GB 696226 A GB696226 A GB 696226A
Authority
GB
United Kingdom
Prior art keywords
tube
photo
envelope
sensitive surface
side tube
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
GB2408350A
Inventor
George Bernard Francis Goff
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.)
Heraeus Noblelight Analytics Ltd
Original Assignee
Cathodeon 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 Cathodeon Ltd filed Critical Cathodeon Ltd
Priority to GB2408350A priority Critical patent/GB696226A/en
Priority to US258347A priority patent/US2667600A/en
Priority to FR1058788D priority patent/FR1058788A/en
Publication of GB696226A publication Critical patent/GB696226A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
    • H01J31/30—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at anode potential, e.g. iconoscope
    • H01J31/32—Tubes with image amplification section, e.g. image-iconoscope, supericonoscope
    • 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
    • H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube
    • 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/38—Photoelectric screens; Charge-storage screens not using charge storage, e.g. photo-emissive screen, extended cathode

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

696,226. Television pick-up tubes; cathode materials and processing. CATHODEON, Ltd. Nov. 26, 1951 [Oct. 2, 1950], No. 24083/50. Addition to 688,904. Class 39(i) A television pick-up tube of the type described in the parent Specification is characterized in that both the photo-sensitive surface 21 and the collector electrode 9 are provided in the form of annular internal wall coatings on the tube envelope, the collector electrode being interposed on the envelope wall between the mosaic and the photo-sensitive coating. The photo-sensitive surface may be illuminated by a plurality of small electric lamps 22 which may be controlled individually or in groups by potentiometers or switches; the collector electrode 9 is preferably positive with respect to the photo-sensitive surface to accelerate the photoelectrons on to the mosaic. In manufacture the envelope may be provided with a small side tube 11 containing a magnetic carrier 12 and a charge 13 of antimony; a further side tube 14 contains caesium 15. The antimony may be lowered to the position 13a by magnetic means and evaporated to form coating on the shoulders 10 of the tube and on the end wall 19; the magnetic carrier can thus be withdrawn and the side tube 11 may be sealed off near the tube envelope without destroying the tube's vacuum. The side tube 14 may then be baked to distil the caesium on to the antimony deposits to form the photo-sensitive surface 21 and the photo-cathode 20; the side tube 14 is then sealed off and removed without destroying the vacuum. The activated surface may then be further sensitized by the addition of controlled amounts of oxygen.
GB2408350A 1950-10-02 1950-10-02 Improvements in or relating to television pick-up tubes Expired GB696226A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2408350A GB696226A (en) 1950-10-02 1950-10-02 Improvements in or relating to television pick-up tubes
US258347A US2667600A (en) 1950-10-02 1951-11-27 Television pickup tube
FR1058788D FR1058788A (en) 1950-10-02 1951-12-01 Television Camera Improvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2408350A GB696226A (en) 1950-10-02 1950-10-02 Improvements in or relating to television pick-up tubes

Publications (1)

Publication Number Publication Date
GB696226A true GB696226A (en) 1953-08-26

Family

ID=10206089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2408350A Expired GB696226A (en) 1950-10-02 1950-10-02 Improvements in or relating to television pick-up tubes

Country Status (2)

Country Link
FR (1) FR1058788A (en)
GB (1) GB696226A (en)

Also Published As

Publication number Publication date
FR1058788A (en) 1954-03-18

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