GB784863A - Improvements in or relating to electron discharge devices employing photo-conductivetargets - Google Patents

Improvements in or relating to electron discharge devices employing photo-conductivetargets

Info

Publication number
GB784863A
GB784863A GB21832/54A GB2183254A GB784863A GB 784863 A GB784863 A GB 784863A GB 21832/54 A GB21832/54 A GB 21832/54A GB 2183254 A GB2183254 A GB 2183254A GB 784863 A GB784863 A GB 784863A
Authority
GB
United Kingdom
Prior art keywords
photo
target
voltage
conductive
volts
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
GB21832/54A
Inventor
Hans Gerhard Lubszynski
John Wardley
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 GB21832/54A priority Critical patent/GB784863A/en
Priority to US523262A priority patent/US2931931A/en
Priority to FR1137443D priority patent/FR1137443A/en
Publication of GB784863A publication Critical patent/GB784863A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/233—Manufacture of photoelectric screens or charge-storage screens

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Conversion Of X-Rays Into Visible Images (AREA)
  • Lasers (AREA)

Abstract

784,863. Photo-conductors. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 7, 1955 [July 27, 1954], No. 21832/54. Drawings to Specification. Class 37. [Also in Group XL (a)] Substantially uniform sensitivity and dark resistance is imparted permanently to the photo-conductive target of a discharge tube by scanning it with a defocused beam of high beam current whilst setting up a high voltage across gradient through the thickness of the target and illuminating it uniformly. The voltage across the target and the illumination may both be varied from a high to a low value several times. The material of the photo-conductive target is preferably a solid layer of antimony trisulphide superimposed on a spongy layer of the same material, but it may be zinc or cadmium sulphide. With the cathode at zero potential, 300 volts are applied to the limiter and anode electrodes, a variable 0-150 volts to the signal electrode and 15-200 foot candles illumination to the target. Alternatively the voltage of the signal electrode may be kept constant and the cathode potential varied. The impedance of the photo-conductive layer should not fall below 10 megohms.
GB21832/54A 1954-07-27 1954-07-27 Improvements in or relating to electron discharge devices employing photo-conductivetargets Expired GB784863A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB21832/54A GB784863A (en) 1954-07-27 1954-07-27 Improvements in or relating to electron discharge devices employing photo-conductivetargets
US523262A US2931931A (en) 1954-07-27 1955-07-20 Electron discharge devices employing photo-conductive target electrodes
FR1137443D FR1137443A (en) 1954-07-27 1955-07-26 Improvements to electronic discharge devices using photo-conductive electrodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21832/54A GB784863A (en) 1954-07-27 1954-07-27 Improvements in or relating to electron discharge devices employing photo-conductivetargets

Publications (1)

Publication Number Publication Date
GB784863A true GB784863A (en) 1957-10-16

Family

ID=10169561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21832/54A Expired GB784863A (en) 1954-07-27 1954-07-27 Improvements in or relating to electron discharge devices employing photo-conductivetargets

Country Status (3)

Country Link
US (1) US2931931A (en)
FR (1) FR1137443A (en)
GB (1) GB784863A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192067A (en) * 1961-02-24 1965-06-29 Machlett Lab Inc Vidicon target having areas of different conductance
GB996331A (en) * 1962-01-15 1965-06-23 Emi Ltd Improvements relating to image pick-up devices and circuit arrangements embodying such devices
US4232221A (en) * 1979-01-22 1980-11-04 The United States Of America As Represented By The Secretary Of The Air Force Method and apparatus for trimming IR/CCD mosaic sensors
US5638968A (en) * 1996-02-26 1997-06-17 Baron; Moises S. Baby bottle extension assembly having storage chamber and release mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL45505C (en) * 1935-09-24 1900-01-01
US2744837A (en) * 1951-06-01 1956-05-08 Rca Corp Photo-conductive targets for cathode ray devices
GB807992A (en) * 1954-07-03 1959-01-28 Emi Ltd Improvements in or relating to cathode ray image pick-up devices

Also Published As

Publication number Publication date
US2931931A (en) 1960-04-05
FR1137443A (en) 1957-05-28

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