EP0193785A1 - Tube de prise de vues de télévision du type vidicon - Google Patents

Tube de prise de vues de télévision du type vidicon Download PDF

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Publication number
EP0193785A1
EP0193785A1 EP86102089A EP86102089A EP0193785A1 EP 0193785 A1 EP0193785 A1 EP 0193785A1 EP 86102089 A EP86102089 A EP 86102089A EP 86102089 A EP86102089 A EP 86102089A EP 0193785 A1 EP0193785 A1 EP 0193785A1
Authority
EP
European Patent Office
Prior art keywords
tube
pins
vidicon
fine structure
target
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.)
Withdrawn
Application number
EP86102089A
Other languages
German (de)
English (en)
Inventor
Heinz Schindling
Hellmut Marseille
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.)
Heimann GmbH
Original Assignee
Heimann GmbH
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 Heimann GmbH filed Critical Heimann GmbH
Publication of EP0193785A1 publication Critical patent/EP0193785A1/fr
Withdrawn legal-status Critical Current

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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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical 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
    • H01J29/025—Mounting or supporting arrangements for grids

Definitions

  • a fine structure mesh is located in the Vidicon type television tube at a small distance of about 3 mm in front of the photoconductor target. It is attached to the mechanical parts of the electron beam system in isolation. These mechanical parts are formed by a sheet metal cylinder that sits inside the tube bulb. This sheet metal cylinder can be replaced by a metal layer vapor-deposited on the inner surface of the tube bulb. In this case there is no longer any possibility of attaching the fine structure mesh to mechanical parts of the electron beam system.
  • the attachment can be done by support rings that are melted into the tube bulb or squeezed with indium. In indium quenching, the tube bulb between the fine structure mesh and the target usually consists of a ceramic ring. This type of network attachment, however, significantly increases the capacitance between the target and the network because, on the one hand, the effective area of the network is increased and, on the other hand, ceramic has a higher dielectric constant than glass.
  • the invention has for its object to provide a Vidicon type television receiver tube so that if there are no mechanical parts for holding the fine structure mesh, the total area is reduced to a minimum without the function being impaired, without the capacity between the target and the mesh being undesirable is increased.
  • the fine structure mesh arranged in the direction of the electron beam in front of the target is attached to pins which are melted radially into the tube bulb.
  • the pins can be soldered into the tube bulb so that the inner surface of the tube bulb is not deformed.
  • the capacity between the target and the fine structure mesh corresponds to the capacity of a video icon in which the fine structure mesh is held on the sheet metal cylinder (grid 3)
  • the vidicon shown in the figure 1 comprises a cylindrical valve tube 5 made of glass, at the front end a, the target 6 constituting the glass sheet 19 is arranged with a memory layer 1 8
  • the memory layer 1 8 is a photosensitive semiconductor layer on said optically perfect plane-parallel glass plate 19 is applied between the glass pane 19 and the semiconductor memory layer 18, a thin, transparent and electrically conductive layer 20 as a signal plate. This is electrically connected to the signal electrode ring 7, which connects the tube bulb 5 to the glass pane 19 and from which the video signal is taken.
  • the electron beam 9 emanating from the cathode 8 runs in an electron-optical system with four grids 1 to 4.
  • the outside of the tube bulb 5 is enclosed by an adjusting coil 17 , a deflection coil 10 and a focusing coil 11.
  • the grid 4 is formed by a fine structure mesh which is fastened in an insulated manner to the grid 3 formed by a metal cylinder at a distance of approximately 3 mm in front of the target 6
  • FIG. 2 shows an embodiment of a holder according to the invention for a fine structure mesh 12 forming the mesh 4, which is particularly suitable in the case in which the mesh 3 is formed by a metal layer which is vapor-deposited on the inside of the tube bulb 5.
  • the Feinstruktumetz 12 is held between two rings 13, 14, of which the lower ring 1 4 on z. B. three or more pins 15, of which only two pins are visible in Figure 2.
  • the pins 15 are melted radially into the tube bulb 5, in the example with the aid of glass solder 16 and inside the tube bulb 5 flattened on their sides facing the ring 14.
  • the ring 14 is connected to the pins in an electrically conductive manner. It is particularly expedient to provide three pins 15 offset by 120 ° from one another.

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  • Surface Treatment Of Glass (AREA)
EP86102089A 1985-03-04 1986-02-18 Tube de prise de vues de télévision du type vidicon Withdrawn EP0193785A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3507586 1985-03-04
DE3507586 1985-03-04

Publications (1)

Publication Number Publication Date
EP0193785A1 true EP0193785A1 (fr) 1986-09-10

Family

ID=6264140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102089A Withdrawn EP0193785A1 (fr) 1985-03-04 1986-02-18 Tube de prise de vues de télévision du type vidicon

Country Status (1)

Country Link
EP (1) EP0193785A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068548A (en) * 1959-10-28 1962-12-18 Raytheon Co Method for installing electrodes
US3346756A (en) * 1965-04-13 1967-10-10 Robert J Doyle Electrode support for an optical fiber disc
US3421038A (en) * 1966-10-03 1969-01-07 Hughes Aircraft Co Storage mesh ring assembly support
FR2231100A1 (fr) * 1973-05-23 1974-12-20 Philips Nv

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068548A (en) * 1959-10-28 1962-12-18 Raytheon Co Method for installing electrodes
US3346756A (en) * 1965-04-13 1967-10-10 Robert J Doyle Electrode support for an optical fiber disc
US3421038A (en) * 1966-10-03 1969-01-07 Hughes Aircraft Co Storage mesh ring assembly support
FR2231100A1 (fr) * 1973-05-23 1974-12-20 Philips Nv

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18W Application withdrawn

Withdrawal date: 19861208

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MARSEILLE, HELLMUT

Inventor name: SCHINDLING, HEINZ