GB2002578A - Pick-up tubes with photoconductive target - Google Patents

Pick-up tubes with photoconductive target

Info

Publication number
GB2002578A
GB2002578A GB7828036A GB7828036A GB2002578A GB 2002578 A GB2002578 A GB 2002578A GB 7828036 A GB7828036 A GB 7828036A GB 7828036 A GB7828036 A GB 7828036A GB 2002578 A GB2002578 A GB 2002578A
Authority
GB
United Kingdom
Prior art keywords
pick
tubes
layer
photoconductive target
mixture
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.)
Granted
Application number
GB7828036A
Other versions
GB2002578B (en
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co 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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Priority to GB7828036A priority Critical patent/GB2002578B/en
Publication of GB2002578A publication Critical patent/GB2002578A/en
Application granted granted Critical
Publication of GB2002578B publication Critical patent/GB2002578B/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
    • H01J31/34—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
    • H01J31/38—Tubes with photoconductive screen, e.g. vidicon
    • 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
    • H01J29/45—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Light Receiving Elements (AREA)

Abstract

In order to provide a target of low photoconductive lag and relatively small capacitance upon a film of electrically conducting material, a first layer is provided which consists of a mixture of selenium and arsenic and a further layer is provided on said first layer which comprises a mixture of the same two elements, but with the proportion of arsenic increased, at least a portion of the further layer being of a spongy nature.
GB7828036A 1977-06-29 1978-06-27 Pick-up tubes Expired GB2002578B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7828036A GB2002578B (en) 1977-06-29 1978-06-27 Pick-up tubes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2725477 1977-06-29
GB7828036A GB2002578B (en) 1977-06-29 1978-06-27 Pick-up tubes

Publications (2)

Publication Number Publication Date
GB2002578A true GB2002578A (en) 1979-02-21
GB2002578B GB2002578B (en) 1982-01-27

Family

ID=26258714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7828036A Expired GB2002578B (en) 1977-06-29 1978-06-27 Pick-up tubes

Country Status (1)

Country Link
GB (1) GB2002578B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2426329A1 (en) * 1978-05-19 1979-12-14 Philips Nv TUBE SHOOTING FOR TELEVISION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2426329A1 (en) * 1978-05-19 1979-12-14 Philips Nv TUBE SHOOTING FOR TELEVISION

Also Published As

Publication number Publication date
GB2002578B (en) 1982-01-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee