GB1336970A - Television camera tube - Google Patents

Television camera tube

Info

Publication number
GB1336970A
GB1336970A GB3042972A GB3042972A GB1336970A GB 1336970 A GB1336970 A GB 1336970A GB 3042972 A GB3042972 A GB 3042972A GB 3042972 A GB3042972 A GB 3042972A GB 1336970 A GB1336970 A GB 1336970A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
target
scanned
axis
television camera
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
GB3042972A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1336970A publication Critical patent/GB1336970A/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
    • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
    • 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
    • H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube
    • 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
    • H01J31/38—Tubes with photoconductive screen, e.g. vidicon

Landscapes

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

Abstract

1336970 Image pick-up tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 June 1972 [2 July 1971] 30429/72 Heading H1D A vidicon provided with a cylindrical electrode 8 between the electron gun and the target and including a diaphragm 15 containing an aperture 16 which restricts the cross-section of the beam, is characterized in that the part of the diaphragm not immediately adjacent the axis makes an acute angle with the axis. Preferably, as illustrated, the diaphragm is a truncated cone. The beam 18 returning from the target generally impinges on the conical part and secondary electrons 19 produced by the impact tend to travel away from the target. The part 17 of the diaphragm gives rise to a secondary beam which is directed towards the target and should be small enough to ensure that the secondary beam does not impinge on areas not scanned by the primary beam; if the scanned raster is 6 x 8 mm the diameter of part 17 should be less than 4 mm and may be 2 mm.
GB3042972A 1971-07-02 1972-06-29 Television camera tube Expired GB1336970A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL7109140A NL7109140A (en) 1971-07-02 1971-07-02
US26525972A 1972-06-22 1972-06-22
US447563A US3866079A (en) 1971-07-02 1974-03-04 Television camera tube in which the detrimental effect of the return beam is counteracted

Publications (1)

Publication Number Publication Date
GB1336970A true GB1336970A (en) 1973-11-14

Family

ID=27351688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3042972A Expired GB1336970A (en) 1971-07-02 1972-06-29 Television camera tube

Country Status (7)

Country Link
US (1) US3866079A (en)
AU (1) AU463685B2 (en)
CA (1) CA950954A (en)
DE (1) DE2230529C2 (en)
FR (1) FR2144742B1 (en)
GB (1) GB1336970A (en)
NL (1) NL7109140A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7809345A (en) * 1978-09-14 1980-03-18 Philips Nv CATHED BEAM TUBE.
JPS5688240A (en) * 1979-12-19 1981-07-17 Hitachi Ltd Camera tube
NL8004748A (en) * 1980-08-22 1982-03-16 Philips Nv TELEVISION CAMERA TUBE.
GB2088624B (en) * 1980-11-27 1984-09-19 English Electric Valve Co Ltd Improvements in or relating to camera tubes
JPS5996639A (en) * 1982-11-26 1984-06-04 Hitachi Ltd Image pickup tube
FR2630586A1 (en) * 1988-04-22 1989-10-27 Thomson Csf CAMERA TUBE WITH PARASITE IMAGE REMOVAL SCREEN
GB2325335B (en) 1997-05-16 2001-07-11 Leica Lithography Systems Ltd Electron beam aperture element
GB2346007B (en) 1999-01-21 2004-03-03 Imaging & Sensing Tech Corp Getter flash shield

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747133A (en) * 1950-07-05 1956-05-22 Rca Corp Television pickup tube
US2839601A (en) * 1950-09-27 1958-06-17 Julius Cato Vredenburg Inglesb Methods of and apparatus for rendering visible magnetic and electric field patterns
NL293465A (en) * 1962-05-31
US3307061A (en) * 1963-09-16 1967-02-28 Gen Electric Electrostatic return beam camera tube
NL160428C (en) * 1968-02-13 1979-10-15 Philips Nv IMAGE RECORDING DEVICE WITH IMAGE RECORDING TUBE AND IMAGE RECORDING TUBE FOR SUCH DEVICE.

Also Published As

Publication number Publication date
AU463685B2 (en) 1975-07-31
NL7109140A (en) 1973-01-04
AU4400572A (en) 1974-01-03
CA950954A (en) 1974-07-09
DE2230529A1 (en) 1973-01-11
US3866079A (en) 1975-02-11
FR2144742A1 (en) 1973-02-16
FR2144742B1 (en) 1977-07-22
DE2230529C2 (en) 1982-12-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee