GB780819A - Improvements in or relating to devices for converting x-ray or light images into electric signals - Google Patents

Improvements in or relating to devices for converting x-ray or light images into electric signals

Info

Publication number
GB780819A
GB780819A GB6767/55A GB676755A GB780819A GB 780819 A GB780819 A GB 780819A GB 6767/55 A GB6767/55 A GB 6767/55A GB 676755 A GB676755 A GB 676755A GB 780819 A GB780819 A GB 780819A
Authority
GB
United Kingdom
Prior art keywords
layer
image
target
electron
photocathode
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
GB6767/55A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB780819A publication Critical patent/GB780819A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/06—Electrode arrangements
    • H01J43/18—Electrode arrangements using essentially more than one dynode
    • H01J43/24—Dynodes having potential gradient along their surfaces
    • H01J43/243—Dynodes consisting of a piling-up of channel-type dynode plates
    • 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
    • H01J29/023—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements
    • 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
    • H01J29/385—Photocathodes comprising a layer which modified the wave length of impinging radiation
    • 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
    • H01J29/44—Charge-storage screens exhibiting internal electric effects caused by particle radiation, e.g. bombardment-induced conductivity
    • 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
    • H01J29/458—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen pyroelectrical targets; targets for infrared or ultraviolet or X-ray radiations
    • 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
    • H01J31/48—Tubes with amplification of output effected by electron multiplier arrangements within the vacuum space
    • 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
    • H01J31/49—Pick-up adapted for an input of electromagnetic radiation other than visible light and having an electric output, e.g. for an input of X-rays, for an input of infrared radiation
    • 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
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/506—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output tubes using secondary emission effect
    • 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
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/52—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output having grid-like image screen through which the electron ray or beam passes and by which the ray or beam is influenced before striking the luminescent output screen, i.e. having "triode action"
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/06—Electrode arrangements
    • H01J43/18—Electrode arrangements using essentially more than one dynode
    • H01J43/24—Dynodes having potential gradient along their surfaces

Landscapes

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

Abstract

780,819. Cathode ray tubes. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. March 8, 1955 [March 17, 1954], No. 6767/55. Class 39(1). An image intensifier comprises a photocathode 5, Fig. 1, excited directly by a light image or indirectly by an X-ray image, a reducing electron lens, e.g. electrodes 7, 8 for forming a conductivity image on B.I.C. (bombardment induced conductivity) layer 15 of target 12 and an electron beam for scanning the rear side of target 12 to read and erase the conductivity image and a load circuit 24 coupled between metal layer 14 and the scanning beam cathode the metallic layer 14 being on the side facing the input screen. The input screen 2 exposed to the X-rays comprises fluorescent (ZnCdS) layer 6 which converts the X-ray image to a light image which excites photocathode 5 (Cs-Sb) there being intervening layers of glass 4 and transparent conductive material 3. The electron image from 5 is focused down to as small a size as possible on target 12 by lens electrodes 7, 8. Target 12 comprises an open mesh 13 coated by evaporation with secondary emissive material such as K Cl or Au, an electron permeable Al layer 14 and a B.I.C. layer 15 of arsenic trisulphide. The rear face of B.I.C. layer 15 is scanned by a high velocity beam 16 from gun 18 to restore its areas to cathode potential the output signal being taken from the target 12 across resistor 24. The scanning beam 16 is controlled by aligning coil 23, focusing coil 22 and scanning coils 21. The secondary emissive layer 24 on mesh 13 gives a secondary emission ratio > 1 so that the total secondary emission ratio of the target 12 (considering both sides) is approximately unity, and lens electrode 8 collects secondary and back scattered electrons from mesh 13. A non linear amplifier is connected between the tube and a reproducing tube to enhance the contrast. The electron B.I.C. material can be Sb 2 S 3 , Se, Cd S, S, Al 2 O 3 or anthracene. If the fluorescent layer 6 is omitted then a light image can be focused on photocathode 5.
GB6767/55A 1954-03-17 1955-03-08 Improvements in or relating to devices for converting x-ray or light images into electric signals Expired GB780819A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA638396T
US416879A US3001098A (en) 1954-03-17 1954-03-17 X-ray image intensifying device

Publications (1)

Publication Number Publication Date
GB780819A true GB780819A (en) 1957-08-07

Family

ID=74580640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6767/55A Expired GB780819A (en) 1954-03-17 1955-03-08 Improvements in or relating to devices for converting x-ray or light images into electric signals

Country Status (5)

Country Link
US (1) US3001098A (en)
BE (1) BE536517A (en)
CA (1) CA638396A (en)
FR (1) FR1129934A (en)
GB (1) GB780819A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657596A (en) * 1965-05-20 1972-04-18 Westinghouse Electric Corp Electron image device having target comprising porous region adjacent conductive layer and outer, denser region
US3403283A (en) * 1966-03-11 1968-09-24 Chernow Fred Variable transmission system cathode ray tube
GB1164894A (en) * 1967-03-29 1969-09-24 Mullard Ltd Improvements in or relating to Image Intensifier Devices
GB1154515A (en) * 1967-05-15 1969-06-11 Mullard Ltd Improvements in or relating to Image Intensifiers
US3509414A (en) * 1967-08-02 1970-04-28 Itt Storage tube with electron bombardment induced conductivity target
DE1918241A1 (en) * 1968-04-12 1970-09-03 Krusser Boris V Super orthodontic type television tube
CN115073141B (en) * 2022-08-22 2022-11-22 中国科学院理化技术研究所 Single-phase near-zero thermal expansion material and preparation method and application thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668727C (en) * 1935-05-12 1938-12-09 Studiengesellschaft Fuer Hochl Circuit breaker with an expansion chamber filled with liquid or air, which expands during opening
BE484424A (en) * 1947-08-28
US2555424A (en) * 1948-03-09 1951-06-05 Sheldon Edward Emanuel Apparatus for fluoroscopy and radiography
US2683832A (en) * 1948-04-15 1954-07-13 Pye Ltd Image pickup electron tube
BE490037A (en) * 1948-07-07
GB675608A (en) * 1949-06-29 1952-07-16 Cinema Television Ltd Improvements in or relating to electron discharge tubes for storing electrical signals
US2617954A (en) * 1950-12-27 1952-11-11 Rca Corp Pickup tube
US2776387A (en) * 1951-07-30 1957-01-01 Rca Corp Pick-up tube with induced conductivity target

Also Published As

Publication number Publication date
CA638396A (en) 1962-03-20
FR1129934A (en) 1957-01-29
US3001098A (en) 1961-09-19
BE536517A (en)

Similar Documents

Publication Publication Date Title
US2198479A (en) Image reproduction
US2555424A (en) Apparatus for fluoroscopy and radiography
US2555423A (en) Image intensifying tube
US4208577A (en) X-ray tube having scintillator-photocathode segments aligned with phosphor segments of its display screen
US2683832A (en) Image pickup electron tube
US3673457A (en) High gain storage target
US4339659A (en) Image converter having serial arrangement of microchannel plate, input electrode, phosphor, and photocathode
GB780819A (en) Improvements in or relating to devices for converting x-ray or light images into electric signals
US2739258A (en) System of intensification of x-ray images
US2903596A (en) Image transducers
US2277246A (en) Electron discharge device
US2700116A (en) Device for intensification of X-ray images
US2970219A (en) Use of thin film field emitters in luminographs and image intensifiers
US3128406A (en) Radiation image pickup tube
US3555345A (en) Radiation pickup device incorporating electron multiplication
Green Jr Electro-optical systems for dynamic display of X-ray diffraction images
GB770238A (en) Improvements in or relating to image intensifying devices
US2690516A (en) Method and device for producing neutron images
US3383514A (en) Multi-stage image converter with both magnifying and minifying stages
US2916661A (en) Storage cathode ray tube
US2617954A (en) Pickup tube
US2124057A (en) Beam scanning dissector
US2200166A (en) Image analyzing and dissecting tube
US2894159A (en) Electronic system for x-ray images
US2697181A (en) Neutron sensitive tube