GB711202A - Electron camera tubes - Google Patents

Electron camera tubes

Info

Publication number
GB711202A
GB711202A GB2411/49A GB241149A GB711202A GB 711202 A GB711202 A GB 711202A GB 2411/49 A GB2411/49 A GB 2411/49A GB 241149 A GB241149 A GB 241149A GB 711202 A GB711202 A GB 711202A
Authority
GB
United Kingdom
Prior art keywords
layer
target
photo
conductivity
electron
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
GB2411/49A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB711202A publication Critical patent/GB711202A/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
    • H01J29/36—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
    • 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
    • H01J31/36—Tubes with image amplification section, e.g. image-orthicon

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

711,202. Television pick-up tubes. WESTERN ELECTRIC CO., Inc. Jan. 28, 1949 [Jan. 29, 1948; Jan. 29, 1948], Nos. 2411/49 and 2412/49. Class 39(1) An electron camera tube has a target comprising a supporting sheet of electrical insulating material which exhibits bombardment-induced conductivity. The material may be diamond, zinc sulphide, magnesium oxide, silicon carbide, or stibnite as described in Specifications 676,411 and 676,424. A transmitter tube 10 contains a double-sided target 11 comprising a thin layer .40 of cut diamond or of diamond dust or chips, a thin covering layer 41 of metal e.g. gold or platinum on one side and a thin photo-sensitive layer 42 of non-conducting material on the other side e.g. caesium oxide or caesium oxide-silver. Electron collecting mesh electrodes 14, 15 are situated on opposite sides of the target. An image of the object O to be transmitted is focused on to surface 42, liberating photoelectrons to mesh 15 and building up a charge image on the layer. The scanning-beam from gun 13 is of high velocity giving secondary emission equal to unity but causing conductivity at the impacted places in layer 40 and discharging the charge image on layer 42 to produce a video signal in the output circuit 33-38. In Fig. 5, the light image falls on a photo-cathode 65, the photoelectrons are accelerated on to a target 53 comprising material exhibiting electron bombardment induced conductivity coated with a thin layer 53 of gold or platinum which is at earth potential. A metallic barrier 54 surrounds the target and prevents photo-electrons passing to the scanned sides. The cathode 69 of the orthican scanning gun is at -300 volts and the conductivity induced by the photo-electrons results in the formation of a charge image at earth potential on the uncoated side of the layer 52. The scanning beam is reflected from those points at cathode potential and return to the electron multiplier 64 which yields an amplified video signal. The orthicon tube is provided with focusing, deflecting and alignment coils 66, 67. Specification 648,509 also is referred to.
GB2411/49A 1948-01-29 1949-01-28 Electron camera tubes Expired GB711202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5009A US2544753A (en) 1948-01-29 1948-01-29 Electron camera tube

Publications (1)

Publication Number Publication Date
GB711202A true GB711202A (en) 1954-06-30

Family

ID=21713665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2411/49A Expired GB711202A (en) 1948-01-29 1949-01-28 Electron camera tubes

Country Status (5)

Country Link
US (1) US2544753A (en)
BE (1) BE486171A (en)
FR (1) FR975726A (en)
GB (1) GB711202A (en)
NL (1) NL79223C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204142A (en) * 1959-09-17 1965-08-31 Philips Corp Pickup tube having photoconductive target

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733364A (en) * 1956-01-31 flory
GB683603A (en) * 1948-02-18 1952-12-03 Emi Ltd Improvements in or relating to electron discharge pick-up tubes suitable for use in television
US2683832A (en) * 1948-04-15 1954-07-13 Pye Ltd Image pickup electron tube
US2734145A (en) * 1949-10-27 1956-02-07 William
US2588292A (en) * 1950-04-20 1952-03-04 Philips Lab Inc Electron switching tubes and circuits therefor
US2747133A (en) * 1950-07-05 1956-05-22 Rca Corp Television pickup tube
US2777970A (en) * 1950-10-03 1957-01-15 Paul K Weimer Television camera storage tube
US2864031A (en) * 1950-12-30 1958-12-09 Rca Corp Electrical storage tube
US2710813A (en) * 1951-01-02 1955-06-14 Rca Corp Cadmium selenide-zinc selenide photoconductive electrode and method of producing same
DE974081C (en) * 1951-03-20 1960-09-08 Hans-Werner Dr Rer Nat Paehr Arrangement for picture taking tubes
US2776387A (en) * 1951-07-30 1957-01-01 Rca Corp Pick-up tube with induced conductivity target
US2747131A (en) * 1951-10-12 1956-05-22 Sheldon Edward Emanuel Electronic system sensitive to invisible images
US2851624A (en) * 1951-10-12 1958-09-09 Sheldon Edward Emanuel Tube sensitive to images of invisible radiation
US2749463A (en) * 1951-10-24 1956-06-05 Bell Telephone Labor Inc Solid state television pick-up tube
US2747132A (en) * 1951-12-18 1956-05-22 Sheldon Edward Emanuel Device sensitive to invisible images
US2840755A (en) * 1952-03-21 1958-06-24 Westinghouse Electric Corp Large storage low noise image tube
FR1057404A (en) * 1952-05-27 1954-03-08 Csf Photoconductive cell tube
US2851625A (en) * 1952-10-30 1958-09-09 Rca Corp Image tube
NL92819C (en) * 1952-12-09
US2928969A (en) * 1956-05-11 1960-03-15 Westinghouse Electric Corp Image device
US2911562A (en) * 1957-09-20 1959-11-03 Thompson Ramo Wooldridge Inc Television camera circuits
DE1120035B (en) * 1958-02-18 1961-12-21 Optische Ind Iade Oude Delftia Electron-optical imaging device
US2922907A (en) * 1958-05-23 1960-01-26 Gen Electric Target electrode assembly
US2951962A (en) * 1959-05-22 1960-09-06 Rca Corp Pickup tube assembly
US3148297A (en) * 1959-11-27 1964-09-08 Westinghouse Electric Corp Electron device with storage capabilities
US3213316A (en) * 1962-12-03 1965-10-19 Westinghouse Electric Corp Tube with highly porous target

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251992A (en) * 1938-06-15 1941-08-12 Rca Corp Picture transmitter tube
US2401786A (en) * 1942-10-23 1946-06-11 Rca Corp Television transmitting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204142A (en) * 1959-09-17 1965-08-31 Philips Corp Pickup tube having photoconductive target
DE1213885B (en) * 1959-09-17 1966-04-07 Philips Nv Signal plate for an image pick-up tube with a photoconductive layer

Also Published As

Publication number Publication date
NL79223C (en)
FR975726A (en) 1951-03-08
BE486171A (en)
US2544753A (en) 1951-03-13

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