GB672794A - Improvements in or relating to television pick-up tubes - Google Patents

Improvements in or relating to television pick-up tubes

Info

Publication number
GB672794A
GB672794A GB1717749A GB1717749A GB672794A GB 672794 A GB672794 A GB 672794A GB 1717749 A GB1717749 A GB 1717749A GB 1717749 A GB1717749 A GB 1717749A GB 672794 A GB672794 A GB 672794A
Authority
GB
United Kingdom
Prior art keywords
target
layer
potential
conducting layer
photo
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
GB1717749A
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.)
GEORGE STANLEY PERCIVAL FREEMA
Cinema Television Ltd
Original Assignee
GEORGE STANLEY PERCIVAL FREEMA
Cinema Television 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 GEORGE STANLEY PERCIVAL FREEMA, Cinema Television Ltd filed Critical GEORGE STANLEY PERCIVAL FREEMA
Priority to GB1717749A priority Critical patent/GB672794A/en
Priority to DEC3116A priority patent/DE886466C/en
Publication of GB672794A publication Critical patent/GB672794A/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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • 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
    • H01J31/34—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 cathode potential, e.g. orthicon
    • H01J31/36—Tubes with image amplification section, e.g. image-orthicon

Landscapes

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

Abstract

672,794. Cathode-ray tubes. CINEMATELEVISION, Ltd., and FREEMAN, G. S. P. June 26, 1950 [June 29, 1949], No. 17177/49. Class 39 (i). A circuit arrangement comprises a television pick-up tube including a photo-cathode 1 and a storage electrode on which the photo-electrons are arranged to impinge and which is in the form of a double.sided target 2 arranged to be scanned on one side by an electron beam, the other side of the target being covered with a thin insulating layer 3 and a thin conducting layer 4, means being provided for maintaining the conducting layer 4 at a potential different from the potential at which the double sided target 2 is stabilized by the scanning beam. In operation the photo-electrons penetrate the conducting layer 4, which may be of aluminium or beryllium, and the insulating layer 3, which may be of silica or magnesium fluoride, and are brought to rest in the target 2 which may be of glass. The bombardment-induced conductivity allows a current to flow between the target 2 and the conducting layer 4 charging the target positive or negative according to the potential of the layer 4; the potential of the layer 4 may be varied to form a gain control. The target 2 may be scanned by a high velocity beam or a low velocity beam, and the output may be derived from the layer 4 or from the returning electrons of the scanning beam. Specifications 597,532 and 655,290 are referred to. Specification 655,291 also is referred to in the Provisional Specification.
GB1717749A 1949-06-29 1949-06-29 Improvements in or relating to television pick-up tubes Expired GB672794A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1717749A GB672794A (en) 1949-06-29 1949-06-29 Improvements in or relating to television pick-up tubes
DEC3116A DE886466C (en) 1949-06-29 1950-10-03 Image recording tubes for television systems or the like.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1717749A GB672794A (en) 1949-06-29 1949-06-29 Improvements in or relating to television pick-up tubes

Publications (1)

Publication Number Publication Date
GB672794A true GB672794A (en) 1952-05-28

Family

ID=10090609

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1717749A Expired GB672794A (en) 1949-06-29 1949-06-29 Improvements in or relating to television pick-up tubes

Country Status (2)

Country Link
DE (1) DE886466C (en)
GB (1) GB672794A (en)

Also Published As

Publication number Publication date
DE886466C (en) 1953-08-13

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