GB1090774A - Improvements in or relating to photo-electron emissive discharge devices - Google Patents

Improvements in or relating to photo-electron emissive discharge devices

Info

Publication number
GB1090774A
GB1090774A GB3067863A GB3067863A GB1090774A GB 1090774 A GB1090774 A GB 1090774A GB 3067863 A GB3067863 A GB 3067863A GB 3067863 A GB3067863 A GB 3067863A GB 1090774 A GB1090774 A GB 1090774A
Authority
GB
United Kingdom
Prior art keywords
image
photo
coating
aluminium
screen
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
GB3067863A
Inventor
Gordon Peter Davis
Henry Alfred Benbow
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 GB3067863A priority Critical patent/GB1090774A/en
Priority to US385664A priority patent/US3350594A/en
Priority to NL6408758A priority patent/NL6408758A/xx
Priority to DEE27519A priority patent/DE1289587B/en
Publication of GB1090774A publication Critical patent/GB1090774A/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
    • H01J29/18—Luminescent screens
    • 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
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers
    • 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
    • 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
    • H01J43/08—Cathode arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2231/00—Cathode ray tubes or electron beam tubes
    • H01J2231/50—Imaging and conversion tubes
    • H01J2231/50057—Imaging and conversion tubes characterised by form of output stage
    • H01J2231/50063—Optical

Abstract

1,090,774. Image tubes; photomultipliers. ELECTRIC & MUSICAL INDUSTRIES Ltd. July 24, 1964 [Aug. 2, 1963], No. 30678/63. Heading H1D. In an image converter or intensifier or an image pick-up tube in which the photo-electrons impinge on the fluorescent screen or storage target, respectively, with sufficiently high velocity to release ions, the screen or target is provided with a conductive porous coating, e.g. of aluminium, gold or silver, to trap the ions released or the invention is stated to be applicable to photo-multiplier devices. A similar coating may be provided on other electrodes, e.g. the accelerating electrode in an image converter tube. A fluorescent screen may be provided with first an aluminium coating between 250 Š and 1000 Š thick evaporated in a high vacuum at a pressure of 2 x 10<SP>-5</SP> mm. Hg and then with the porous aluminium coating evaporated in argon at a pressure between 0À2 and 2 mm. Hg. Such latter coating is black and thus also inhibits light reflection. In an image intensifier several photo-cathode-luminescent screen stages are provided. In an image orthicon bombardment-induced-conductivity is utilized.
GB3067863A 1963-08-02 1963-08-02 Improvements in or relating to photo-electron emissive discharge devices Expired GB1090774A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3067863A GB1090774A (en) 1963-08-02 1963-08-02 Improvements in or relating to photo-electron emissive discharge devices
US385664A US3350594A (en) 1963-08-02 1964-07-28 Image intensifier having continuous conducting layer between porous metallic coating and luminescent layer
NL6408758A NL6408758A (en) 1963-08-02 1964-07-30
DEE27519A DE1289587B (en) 1963-08-02 1964-07-31 Electron discharge device for image amplifiers, image pickup tubes and photomultiplier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3067863A GB1090774A (en) 1963-08-02 1963-08-02 Improvements in or relating to photo-electron emissive discharge devices

Publications (1)

Publication Number Publication Date
GB1090774A true GB1090774A (en) 1967-11-15

Family

ID=10311418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3067863A Expired GB1090774A (en) 1963-08-02 1963-08-02 Improvements in or relating to photo-electron emissive discharge devices

Country Status (1)

Country Link
GB (1) GB1090774A (en)

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