GB902090A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB902090A
GB902090A GB35142/57A GB3514257A GB902090A GB 902090 A GB902090 A GB 902090A GB 35142/57 A GB35142/57 A GB 35142/57A GB 3514257 A GB3514257 A GB 3514257A GB 902090 A GB902090 A GB 902090A
Authority
GB
United Kingdom
Prior art keywords
mosaic
electrode
photo
multiplier
electrodes
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
GB35142/57A
Inventor
Harry Cassman
Hans Gerhard Lubszynski
Anthony Wilfred Bennett
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 GB35142/57A priority Critical patent/GB902090A/en
Priority to US771829A priority patent/US3027478A/en
Publication of GB902090A publication Critical patent/GB902090A/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
    • H01J29/023—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
    • 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
    • H01J31/265—Image pick-up tubes having an input of visible light and electric output with light spot scanning

Landscapes

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

Abstract

902,090. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES Ltd. Oct. 28, 1958 [Nov. 12, 1957 ; April 24, 1958], Nos. 35142/57 and 13020/58. Class 39 (1). A photo-emissive mosaic 3, Fig. 1, has a transparent secondary emissive electrode 11, facing parallel to it, the mosaic being scanned by a light spot from source 16 which passes through electrode 11, means being provided for directing photo-electrons from the mosaic on to the electrode 11, and for the collection of the secondary electrons which it emits. As shown, an image is projected through window 5 on to transparent photo-electric layer 4. The electron image is focused by accelerating and retarding electrodes 7 and 8, and solenoid 9 on to glass target 2 which carries mosaic 3 on the other side. Facing the mosaic and close to it is a mesh grid 10 held at a slightly negative or positive potential to give a datum potential to the mosaic elements. Photo-electrons liberated from the mosaic by the scanning beam are accelerated on to the electrode 11 by means of the electrodes 19 and the electrode 11, which is carried on an optical window 13, forms the first stage of an electron multiplier 21 arranged in the annular space surrounding the re-entrant portion of the tube 15. The photo-emission from the mosaic is arranged to be out of focus when it strikes electrode 11. The annular electrodes may be circular, as shown, or radial. The multiplier 21, Fig. 2, is arranged around the mosaic 3, the electron image space being screened off from the multiplier electrodes by means of screen 26. The secondary emissive electrode is deposited in the flat end wall and is surrounded by the cupshaped electrode 24 which forms the next stage of the multiplier, the solenoid 9 being terminated short of this electrode to enable the electrons to take the correct path 22.
GB35142/57A 1957-11-12 1957-11-12 Improvements in or relating to electron discharge devices Expired GB902090A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB35142/57A GB902090A (en) 1957-11-12 1957-11-12 Improvements in or relating to electron discharge devices
US771829A US3027478A (en) 1957-11-12 1958-11-04 Electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35142/57A GB902090A (en) 1957-11-12 1957-11-12 Improvements in or relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB902090A true GB902090A (en) 1962-07-25

Family

ID=10374318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35142/57A Expired GB902090A (en) 1957-11-12 1957-11-12 Improvements in or relating to electron discharge devices

Country Status (2)

Country Link
US (1) US3027478A (en)
GB (1) GB902090A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7309000A (en) * 1973-06-28 1974-12-31
FR2445018A1 (en) * 1978-12-22 1980-07-18 Anvar ELECTRON MULTIPLIER TUBE WITH AXIAL MAGNETIC FIELD
GB2183899A (en) * 1985-11-29 1987-06-10 Philips Electronic Associated Electron beam addressed memory

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA558599A (en) * 1958-06-10 English Electric Valve Company Limited Television and like pick-up tubes
US2618761A (en) * 1949-02-23 1952-11-18 Rca Corp Negative stored charge pickup tube
BE527476A (en) * 1953-05-13
GB799425A (en) * 1954-07-20 1958-08-06 Emi Ltd Improvements in or relating to arrangements embodying pick-up tubes

Also Published As

Publication number Publication date
US3027478A (en) 1962-03-27

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