EP0429694A1 - X-ray image intensifier - Google Patents

X-ray image intensifier Download PDF

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Publication number
EP0429694A1
EP0429694A1 EP89121922A EP89121922A EP0429694A1 EP 0429694 A1 EP0429694 A1 EP 0429694A1 EP 89121922 A EP89121922 A EP 89121922A EP 89121922 A EP89121922 A EP 89121922A EP 0429694 A1 EP0429694 A1 EP 0429694A1
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EP
European Patent Office
Prior art keywords
housing
ray image
parts
image intensifier
attached
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.)
Granted
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EP89121922A
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German (de)
French (fr)
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EP0429694B1 (en
Inventor
Heinz Röhrich
Fritz-Wilhelm Dipl.-Ing. Lange (Fh)
Walter Dipl.-Phys. Greschat
Silvester Dr.-Ing. Schweda
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE58907799T priority Critical patent/DE58907799D1/en
Priority to EP89121922A priority patent/EP0429694B1/en
Priority to JP1990123491U priority patent/JP2558910Y2/en
Priority to US07/618,417 priority patent/US5155349A/en
Publication of EP0429694A1 publication Critical patent/EP0429694A1/en
Application granted granted Critical
Publication of EP0429694B1 publication Critical patent/EP0429694B1/en
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    • 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
    • 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
    • H01J31/501—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electrostatic electron optic system

Definitions

  • the invention relates to an X-ray image intensifier with a housing, an input screen, an output screen and electrodes for electron optics, in which the housing is constructed in several parts and at least one of the housing parts consists of an electrically insulating material.
  • X-ray image intensifiers of this type are used for converting and amplifying the x-ray image into a visible image.
  • Such an X-ray image intensifier is described in DE-AS 26 19 507, in which the housing consists of two housing parts.
  • the housing part facing the exit screen, which encloses the anode and the electrodes with high voltage, is made of ceramic, while the other housing part is made of stainless steel.
  • the electrodes are attached to the ceramic housing part and are carried, for example, by spacers.
  • Such an X-ray image intensifier has the disadvantage that many parts are required to manufacture it, so that it is very expensive. In addition, the electrodes must be installed and adjusted very carefully.
  • the invention has for its object to provide an X-ray image intensifier of the type mentioned, which has only a small number of components, so that its manufacture is simplified, and in which the electrodes can be mounted without adjustment.
  • the object is achieved in that the housing parts made of an electrically insulating material are provided with support surfaces on which parts by Auf shrink are attached. This eliminates, for example, the brackets required for mounting the electrodes. Thanks to precisely defined contact surfaces and correspondingly precisely manufactured, stable electrodes, an optimally aligned electrode system is obtained without adjustment.
  • Electrodes are attached by shrink-fitting as parts.
  • the X-ray image intensifier and the subsequent optics and television device are held in a stable manner if a holder is attached by shrinking on.
  • the electrically insulating parts made of ceramic - for example made of aluminum oxide - and the parts, for example the electrodes, made of metal, e.g. an aluminum alloy.
  • a simple construction through the appropriate selection and shaping of the parts of the housing is obtained if the housing has a first tubular housing part made of ceramic in the area of the exit screen, with the carrier for the exit screen at one end and a first electrode by shrinking on at the other end are attached if in the area of the first electrode a second tubular housing part made of ceramic is vacuum-tightly attached to the first housing part, at the other end of which a further electrode is attached. Additional components can be saved if the second housing part is coated on its inner wall with a second electrode. The number of parts can be further reduced if the housing has only one housing part made of an insulating material, on the inner wall of which several electrodes are attached by vapor deposition.
  • an X-ray image intensifier with a housing 1 shown, which consists of two ceramic housing parts 2 and 3 and a metallic housing part 4.
  • the diameter of the housing 1 of the X-ray image intensifier extends from the first ceramic housing part 2 to the metal housing part 4.
  • the metal housing part 4 can be made of stainless steel, for example VACON, and the ceramic housing parts 2 and 3 can consist of aluminum oxide.
  • the input screen 6 which forms the end of the tube housing on the input side and in which, in a known manner, a luminous layer 8, which consists, for example, of cesium iodide (CsI), and a photocathode 9 are attached to an aluminum support 7.
  • a carrier 10 is inserted into the opening of the ceramic housing part 2 for the output screen 11 and is brazed to the housing part 2.
  • the exit screen 11 has an optically transparent pane 12, on the inside of which a luminous layer 13 is attached.
  • the anode 14 is also attached to the carrier 11.
  • the first ceramic housing part 2 is essentially tubular. On its side facing away from the exit screen 11, it is provided on the outside with a bearing surface 21, onto which the first electrode 15, which is made of an aluminum alloy, is shrunk by heating and subsequent cooling.
  • the electrode 15 consists essentially of a perforated disc, the outer edge of which has a thickening which rests on the bearing surface 21.
  • the first ceramic housing part 2 In the vicinity of the support surface 21 for the first electrode 15, the first ceramic housing part 2 is provided with an annular flange 16, through which the second ceramic, tubular housing part 3 is connected to the first housing part 2 by soldering. In the area outside the first electrode 15, the second housing part 3 is coated on the inside with a second electrode 17.
  • the second housing part 3 On its side facing away from the output screen 11, the second housing part 3 has two contact surfaces 22 and 24 on the outside.
  • the third electrode 18 is shrunk onto the contact surface 22 closest to the edge.
  • This electrode 18 also consists of an aluminum molded part. It is plugged onto the front area of the housing part 3 and directed towards the front, whereby it first widens conically and then runs out in a ring.
  • the metallic housing part 4 of the housing 1, which carries the exit fluorescent screen 6, is soldered to the other contact surface 24.
  • the housing parts 3 and 4 are provided with bores which are provided for receiving the pump connection 19 for connection to the vacuum pump and the getter connection 20 for the getter pump.
  • a perforated disk-shaped holder 25 is shrunk on, which serves to fasten the X-ray image intensifier in a housing (not shown). Furthermore, the subsequent optics can be rigidly connected to the X-ray image intensifier on the holder 25.
  • the bracket 25 can also consist of metal. However, it can also be made from any shrinkable material.
  • the electrodes are contacted to the outside in the case of the electrode 15 via the metallization of the soldered seam, in the case of the electrode 17 via the pump connection 19 and in the case of the electrode 18 via a special vacuum-tight bushing (not shown).
  • the photocathode and anode receive their contact via the metal parts 4 and 10 of the housing 1 connected to them.
  • an X-ray image intensifier is obtained which is made up of only a few parts.
  • the electrodes len any fastening and holding means and largely special vacuum-tight bushings, whereby the susceptibility to leaks is reduced.
  • the shrinking technique electrodes are obtained with a correspondingly precise dimensioning, which are arranged at a precisely defined point, so that an adjustment need not take place.
  • the simplified structure and the secure fastening technology ensure a very vibration-proof system, the materials used (metal, ceramic) a largely unbreakable tube.

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

Abstract

The invention relates to an X-ray image intensifier having a housing (1), an input screen (6), an output screen (11) and electrodes (15, 17, 18) for electron optics, in which the housing (1) is constructed in a plurality of parts and at least one of the housing parts (2 to 4) consists of an electrically insulating material. The parts (2, 3) of the housing (1) consisting of an insulating material are provided with contact surfaces (21 to 23) to which parts (15, 18, 25), for example electrodes, are attached by shrinking on. <IMAGE>

Description

Die Erfindung betrifft einen Röntgenbildverstärker mit einem Gehäuse, einem Eingangsschirm, einem Ausgangsschirm und Elek­troden für die Elektronenoptik, bei dem das Gehäuse mehrteilig ausgebildet ist und wenigstens einer der Gehäuseteile aus einem elektrisch isolierenden Material besteht. Derartige Röntgenbild­verstärker dienen zur Umwandlung und Verstärkung des Röntgen­strahlenbildes in ein sichtbares Bild.The invention relates to an X-ray image intensifier with a housing, an input screen, an output screen and electrodes for electron optics, in which the housing is constructed in several parts and at least one of the housing parts consists of an electrically insulating material. X-ray image intensifiers of this type are used for converting and amplifying the x-ray image into a visible image.

In der DE-AS 26 19 507 ist ein derartiger Röntgenbildverstär­ker beschrieben, bei dem das Gehäuse aus zwei Gehäuseteilen be­steht. Der dem Ausgangsschirm zugewandte Gehäuseteil, der die Anode und die Elektroden mit hoher Spannung umschließt, besteht dabei aus Keramik, während der andere Gehäuseteil aus Edelstahl erstellt ist. In dem Röntgenbildverstärker sind an dem kerami­schen Gehäuseteil die Elektroden angebracht, die beispielsweise von Abstandshaltern getragen werden. Ein derartiger Röntgenbild­verstärker weist den Nachteil auf, daß zu seiner Herstellung viele Teile benötigt werden, so daß sie sehr kostspielig ist. Außerdem müssen die Elektroden sehr sorgfältig montiert und ju­stiert werden.Such an X-ray image intensifier is described in DE-AS 26 19 507, in which the housing consists of two housing parts. The housing part facing the exit screen, which encloses the anode and the electrodes with high voltage, is made of ceramic, while the other housing part is made of stainless steel. In the X-ray image intensifier, the electrodes are attached to the ceramic housing part and are carried, for example, by spacers. Such an X-ray image intensifier has the disadvantage that many parts are required to manufacture it, so that it is very expensive. In addition, the electrodes must be installed and adjusted very carefully.

Die Erfindung geht von der Aufgabe aus, einen Röntgenbildver­stärker der eingangs genannten Art zu schaffen, der nur eine geringe Anzahl von Bauteilen aufweist, so daß sich dessen Her­stellung vereinfacht, und bei dem die Elektroden ohne Justage montiert werden können.The invention has for its object to provide an X-ray image intensifier of the type mentioned, which has only a small number of components, so that its manufacture is simplified, and in which the electrodes can be mounted without adjustment.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die aus einem elektrisch isolierenden Material erstellten Gehäusetei­le mit Auflageflächen versehen sind, an denen Teile durch Auf­ schrumpfen befestigt sind. Dadurch entfallen beispielsweise die für die Montage der Elektroden benötigten Halterungen. Durch ge­nau definierte Auflageflächen und entsprechend präzis gefertig­te, stabile Elektroden erhält man ohne Justage ein optimal aus­gerichtetes Elektrodensystem.The object is achieved in that the housing parts made of an electrically insulating material are provided with support surfaces on which parts by Auf shrink are attached. This eliminates, for example, the brackets required for mounting the electrodes. Thanks to precisely defined contact surfaces and correspondingly precisely manufactured, stable electrodes, an optimally aligned electrode system is obtained without adjustment.

Ein besonders einfacher und stabiler Aufbau ergibt sich, wenn als Teile Elektroden durch Aufschrumpfen befestigt sind. Eine stabile Halterung des Röntgenbildverstärkers sowie der darauf­folgenden Optik und Fernseheinrichtung ergibt sich, wenn eine Halterung durch Aufschrumpfen befestigt ist. Es hat sich als vorteilhaft erwiesen, wenn die elektrisch isolierenden Teile aus Keramik - beispielsweise aus Aluminiumoxid - und die Teile, beispielsweise die Elektroden, aus Metall, z.B. einer Aluminium­legierung bestehen.A particularly simple and stable construction results if electrodes are attached by shrink-fitting as parts. The X-ray image intensifier and the subsequent optics and television device are held in a stable manner if a holder is attached by shrinking on. It has proven to be advantageous if the electrically insulating parts made of ceramic - for example made of aluminum oxide - and the parts, for example the electrodes, made of metal, e.g. an aluminum alloy.

Ein einfacher Aufbau durch die entsprechende Auswahl und Aus­formung der Teile des Gehäuses ergibt sich, wenn das Gehäuse im Bereich des Ausgangsschirmes ein erstes rohrförmiges Gehäuse­teil aus Keramik aufweist, an dessen einem Ende der Träger für den Ausgangsschirm und an dem anderen Ende eine erste Elektrode durch Aufschrumpfen angebracht sind, wenn im Bereich der ersten Elektrode an dem ersten Gehäuseteil ein zweiter rohrförmiger Gehäuseteil aus Keramik vakuumdicht angebracht ist, an dessen anderem Ende eine weitere Elektrode befestigt ist. Weitere Bau­teile können eingespart werden, wenn der zweite Gehäuseteil an seiner Innenwand mit einer zweiten Elektrode beschichtet ist. Die Teilezahl kann weiterhin reduziert werden, wenn das Gehäuse nur ein Gehäuseteil aus einem isolierenden Material aufweist, auf dessen Innwand mehrere Elektroden durch Aufdampfen befe­stigt ist.A simple construction through the appropriate selection and shaping of the parts of the housing is obtained if the housing has a first tubular housing part made of ceramic in the area of the exit screen, with the carrier for the exit screen at one end and a first electrode by shrinking on at the other end are attached if in the area of the first electrode a second tubular housing part made of ceramic is vacuum-tightly attached to the first housing part, at the other end of which a further electrode is attached. Additional components can be saved if the second housing part is coated on its inner wall with a second electrode. The number of parts can be further reduced if the housing has only one housing part made of an insulating material, on the inner wall of which several electrodes are attached by vapor deposition.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail below with reference to an embodiment shown in the drawing.

In der Figur ist ein Röntgenbildverstärker mit einem Gehäuse 1 dargestellt, das aus zwei keramischen Gehäuseteilen 2 und 3 und einem metallischen Gehäuseteil 4 besteht. Das Gehäuse 1 des Röntgenbildverstärkers erweitert sich dabei in seinem Durchmes­ser von dem ersten keramischen Gehäuseteil 2 bis zum metalli­schen Gehäuseteil 4. Das metallische Gehäuseteil 4 kann aus Edelstahl, beispielsweise VACON, und die keramischen Gehäuse­teile 2 und 3 können aus Aluminiumoxid bestehen.In the figure is an X-ray image intensifier with a housing 1 shown, which consists of two ceramic housing parts 2 and 3 and a metallic housing part 4. The diameter of the housing 1 of the X-ray image intensifier extends from the first ceramic housing part 2 to the metal housing part 4. The metal housing part 4 can be made of stainless steel, for example VACON, and the ceramic housing parts 2 and 3 can consist of aluminum oxide.

An dem metallischen Gehäuseteil 4 ist der Eingangsschirm 6 be­festigt, der den eingangsseitigen Abschluß des Röhrengehäuses bildet und bei dem in bekannter Weise auf einem Aluminiumträger 7 eine Leuchtschicht 8, die beispielsweise aus Cäsiumjodid (CsI) besteht, und eine Photokathode 9 angebracht sind. Auf der gegenüberliegenden Seite ist in die Öffnung des keramischen Ge­häuseteiles 2 für den Ausgangsschirm 11 ein Träger 10 einge­setzt, der mit dem Gehäuseteil 2 hart verlötet ist. Der Aus­gangsschirm 11 weist eine optisch transparente Scheibe 12 auf, auf deren Innenseite eine Leuchtschicht 13 angebracht ist. Eben­falls an dem Träger 11 ist die Anode 14 befestigt.Attached to the metallic housing part 4 is the input screen 6, which forms the end of the tube housing on the input side and in which, in a known manner, a luminous layer 8, which consists, for example, of cesium iodide (CsI), and a photocathode 9 are attached to an aluminum support 7. On the opposite side, a carrier 10 is inserted into the opening of the ceramic housing part 2 for the output screen 11 and is brazed to the housing part 2. The exit screen 11 has an optically transparent pane 12, on the inside of which a luminous layer 13 is attached. The anode 14 is also attached to the carrier 11.

Der erste keramische Gehäuseteil 2 ist im wesentlichen rohrför­mig aufgebaut. An seiner dem Ausgangsschirm 11 abgewandten Sei­te ist er außen mit einer Auflagefläche 21 versehen, auf die die erste, aus einer Aluminium-Legierung bestehende Elektrode 15 durch Erwärmung und anschließende Abkühlung aufgeschrumpft ist. Die Elektrode 15 besteht im wesentlichen aus einer Loch­scheibe, deren Außenrand eine Verdickung aufweist, die auf der Auflagefläche 21 aufliegt.The first ceramic housing part 2 is essentially tubular. On its side facing away from the exit screen 11, it is provided on the outside with a bearing surface 21, onto which the first electrode 15, which is made of an aluminum alloy, is shrunk by heating and subsequent cooling. The electrode 15 consists essentially of a perforated disc, the outer edge of which has a thickening which rests on the bearing surface 21.

In der Nähe der Auflagefläche 21 für die erste Elektrode 15 ist der erste keramische Gehäuseteil 2 mit einem ringförmigen Flansch 16 versehen, durch den der zweite keramische, rohrför­mige Gehäuseteil 3 mit dem ersten Gehäuseteil 2 durch Lötung verbunden ist. Im Bereich außerhalb der ersten Elektrode 15 ist der zweite Gehäuseteil 3 innen mit einer zweiten Elektrode 17 beschichtet.In the vicinity of the support surface 21 for the first electrode 15, the first ceramic housing part 2 is provided with an annular flange 16, through which the second ceramic, tubular housing part 3 is connected to the first housing part 2 by soldering. In the area outside the first electrode 15, the second housing part 3 is coated on the inside with a second electrode 17.

An seiner dem Ausgangsschirm 11 abgewandten Seite weist der zweite Gehäuseteil 3 außen zwei Auflageflächen 22 und 24 auf. Auf der dem Rand am nächsten liegenden Auflagefläche 22 ist die dritte Elektrode 18 aufgeschrumpft. Diese Elektrode 18 besteht ebenfalls aus einem Aluminium-Formteil. Sie ist auf den vorde­ren Bereich des Gehäuseteiles 3 gesteckt und nach vorne gerich­tet, wobei sie sich erst konisch erweitert und dann ringförmig ausläuft.On its side facing away from the output screen 11, the second housing part 3 has two contact surfaces 22 and 24 on the outside. The third electrode 18 is shrunk onto the contact surface 22 closest to the edge. This electrode 18 also consists of an aluminum molded part. It is plugged onto the front area of the housing part 3 and directed towards the front, whereby it first widens conically and then runs out in a ring.

An die andere Auflagefläche 24 ist der metallische Gehäuseteil 4 des Gehäuses 1 gelötet, der den Ausgangsleuchtschirm 6 trägt.The metallic housing part 4 of the housing 1, which carries the exit fluorescent screen 6, is soldered to the other contact surface 24.

Die Gehäuseteile 3 und 4 sind mit Bohrungen versehen, die zur Aufnahme des Pumpanschlusses 19 zur Verbindung mit der Vakuum­pumpe und des Getteranschlusses 20 für die Getterpumpe vorge­sehen sind.The housing parts 3 and 4 are provided with bores which are provided for receiving the pump connection 19 for connection to the vacuum pump and the getter connection 20 for the getter pump.

Auf einer im Bereich des Ausgangsschirmes 11 liegenden Auflage­fläche 24 des keramischen Gehäuseteiles 2 ist eine lochschei­benförmige Halterung 25 aufgeschrumpft, die als Befestigung des Röntgenbildverstärkers in einem nicht dargestellten Gehäuse dient. Weiterhin läßt sich an der Halterung 25 die darauffol­gende Optik starr mit dem Röntgenbildverstärker verbinden. Die Halterung 25 kann dabei auch aus Metall bestehen. Sie kann aber auch aus jedem beliebigen aufschrumpfbaren Material erstellt sein.On a support surface 24 of the ceramic housing part 2 lying in the area of the output screen 11, a perforated disk-shaped holder 25 is shrunk on, which serves to fasten the X-ray image intensifier in a housing (not shown). Furthermore, the subsequent optics can be rigidly connected to the X-ray image intensifier on the holder 25. The bracket 25 can also consist of metal. However, it can also be made from any shrinkable material.

Die Kontaktierung der Elektroden nach außen erfolgt bei der Elektrode 15 über die Metallisierung der Lötnaht, bei der Elek­trode 17 über den Pumpanschluß 19 und bei der Elektrode 18 über eine besondere vakuumdichte Durchführung (nicht gezeichnet). Photokathode und Anode erhalten ihren Kontakt über die mit ih­nen verbundenen Metallteile 4 bzw. 10 des Gehäuses 1.The electrodes are contacted to the outside in the case of the electrode 15 via the metallization of the soldered seam, in the case of the electrode 17 via the pump connection 19 and in the case of the electrode 18 via a special vacuum-tight bushing (not shown). The photocathode and anode receive their contact via the metal parts 4 and 10 of the housing 1 connected to them.

Durch diesen Aufbau erhält man einen Röntgenbildverstärker, der nur aus wenigen Teilen erstellt ist. Für die Elektroden entfal­ len dabei jegliche Befestigungs- und Haltemittel sowie weitge­hend besondere vakummdichte Durchführungen, wodurch die Anfäl­ligkeit gegen Leckstellen herabgesetzt ist. Durch die Auf­schrumpftechnik erhält man bei entsprechend genauer Dimensio­nierung Elektroden, die an einer genau definierten Stelle ange­ordnet sind, so daß eine Justierung nicht zu erfolgen braucht.With this construction, an X-ray image intensifier is obtained which is made up of only a few parts. Not applicable for the electrodes len any fastening and holding means and largely special vacuum-tight bushings, whereby the susceptibility to leaks is reduced. With the shrinking technique, electrodes are obtained with a correspondingly precise dimensioning, which are arranged at a precisely defined point, so that an adjustment need not take place.

Der vereinfachte Aufbau und die sichere Befestigungstechnik ge­währleisten ein sehr schwingungssicheres System, die verwende­ten Materialien (Metall, Keramik) eine weitgehend bruchsichere Röhre.The simplified structure and the secure fastening technology ensure a very vibration-proof system, the materials used (metal, ceramic) a largely unbreakable tube.

Anstelle einer Keramik für die aus isolierendem Material er­stellten Gehäuseteile 2 und 3 ist es auch denkbar, Porzellan oder Glas zu verwenden, auf die dann die Elektroden entweder aufgeschrumpft oder aufgedampft werden. Auch ist es denkbar, statt mehrerer isolierender Gehäuseteile nur ein einziges Ge­häuseteil zu verwenden, an dem die Elektroden entweder durch Aufschrumpfen oder auch nur Aufdampfen angebracht sind.Instead of a ceramic for the housing parts 2 and 3 made of insulating material, it is also conceivable to use porcelain or glass, onto which the electrodes are then either shrunk or vapor-deposited. It is also conceivable to use only a single housing part instead of a plurality of insulating housing parts, to which the electrodes are attached either by shrinking on or simply by vapor deposition.

Claims (9)

1. Röntgenbildverstärker mit einem Gehäuse (1), einem Eingangs­schirm (6), einem Ausgangsschirm (11) und Elektroden (15, 17, 18) für die Elektronenoptik, bei dem das Gehäuse (1) mehrteilig ausgebildet ist und wenigstens einer der Gehäuseteile (2 bis 4) aus einem elektrisch isolierenden Material besteht, da­durch gekennzeichnet, daß die aus einem isolierenden Material erstellten Gehäuseteile (2, 3) mit Aufla­geflächen (21 bis 23) versehen sind, an denen Teile (15, 18, 25) durch Aufschrumpfen befestigt sind.1. X-ray image intensifier with a housing (1), an input screen (6), an output screen (11) and electrodes (15, 17, 18) for electron optics, in which the housing (1) is constructed in several parts and at least one of the housing parts ( 2 to 4) consists of an electrically insulating material, characterized in that the housing parts (2, 3) made of an insulating material are provided with contact surfaces (21 to 23) to which parts (15, 18, 25) are attached by shrinking are. 2. Röntgenbildverstärker nach Anspruch 1, dadurch gekennzeichnet, daß als Teile (15, 18) Elektro­den (15, 18) durch Aufschrumpfen befestigt sind.2. X-ray image intensifier according to claim 1, characterized in that as parts (15, 18) electrodes (15, 18) are attached by shrinking. 3. Röntgenbildverstärker nach Anspruch 1 oder 2, da­durch gekennzeichnet, daß eine Halte­rung (25) durch Aufschrumpfen befestigt ist.3. X-ray image intensifier according to claim 1 or 2, characterized in that a holder (25) is attached by shrinking. 4. Röntgenbildverstärker nach einem der Ansprüche 1 bis 3, da­durch gekennzeichnet, daß die elek­trisch isolierenden Gehäuseteile (2, 3) aus Keramik bestehen.4. X-ray image intensifier according to one of claims 1 to 3, characterized in that the electrically insulating housing parts (2, 3) consist of ceramic. 5. Röntgenbildverstärker nach einem der Ansprüche 1 bis 4, da­durch gekennzeichnet, daß die Teile (15, 18, 25) aus Metall bestehen.5. X-ray image intensifier according to one of claims 1 to 4, characterized in that the parts (15, 18, 25) consist of metal. 6. Röntgenbildverstärker nach einem der Ansprüche 1 bis 5, da­durch gekennzeichnet, daß die Teile (15, 18, 25) aus einer Aluminiumlegierung bestehen.6. X-ray image intensifier according to one of claims 1 to 5, characterized in that the parts (15, 18, 25) consist of an aluminum alloy. 7. Röntgenbildverstärker nach einem der Ansprüche 1 bis 6, da­durch gekennzeichnet, daß das Gehäuse (1) im Bereich des Ausgangsschirmes (11) ein erstes rohrförmi­ges Gehäuseteil (2) aus Keramik aufweist, an dessen einem Ende der Träger (10) für den Ausgangsschirm (11) und an dem anderen Ende eine erste Elektrode (15) durch Aufschrumpfen angebracht sind, daß im Bereich der ersten Elektrode (10) an dem ersten Gehäuseteil (2) ein zweiter rohrförmiger Gehäuseteil (3) aus Keramik angebracht ist, an dessen anderem Ende eine weitere Elektrode (18) durch Aufschrumpfen befestigt ist.7. X-ray image intensifier according to one of claims 1 to 6, characterized in that the housing (1) in the region of the output screen (11) has a first tubular housing part (2) made of ceramic, at one end the support (10) for the exit screen (11) and at the other end a first electrode (15) are attached by shrinking on, that in the area of the first electrode (10) on the first housing part (2) a second tubular housing part (3) ceramic is attached, at the other end a further electrode (18) is attached by shrinking. 8. Röntgenbildverstärker nach Anspruch 7, dadurch gekennzeichnet, daß der zweite Gehäuseteil (3) an seiner Innenwand mit einer zweiten Elektrode (17) beschich­tet ist.8. X-ray image intensifier according to claim 7, characterized in that the second housing part (3) is coated on its inner wall with a second electrode (17). 9. Röntgenbildverstärker nach einem der Ansprüche 1 bis 6, da­durch gekennzeichnet, daß das Gehäuse (1) nur ein Gehäuseteil (2, 3) aus einem isolierenden Material aufweist, auf dessen Innenwand mehrere Elektroden (17) durch Aufdampfen befestigt sind.9. X-ray image intensifier according to one of claims 1 to 6, characterized in that the housing (1) has only one housing part (2, 3) made of an insulating material, on the inner wall of which a plurality of electrodes (17) are attached by vapor deposition.
EP89121922A 1989-11-28 1989-11-28 X-ray image intensifier Expired - Lifetime EP0429694B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE58907799T DE58907799D1 (en) 1989-11-28 1989-11-28 X-ray image intensifier.
EP89121922A EP0429694B1 (en) 1989-11-28 1989-11-28 X-ray image intensifier
JP1990123491U JP2558910Y2 (en) 1989-11-28 1990-11-22 X-ray image intensity
US07/618,417 US5155349A (en) 1989-11-28 1990-11-27 X-ray image intensifier with shrink-fitting parts

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EP89121922A EP0429694B1 (en) 1989-11-28 1989-11-28 X-ray image intensifier

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EP0429694A1 true EP0429694A1 (en) 1991-06-05
EP0429694B1 EP0429694B1 (en) 1994-06-01

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DE4208540A1 (en) * 1992-03-17 1993-09-30 Siemens Ag X=ray image intensifier tube - has accelerating and braking voltages supplied to anode and phosphor-coated output screen respectively with lower voltage on output screen
DE4208538A1 (en) * 1992-03-17 1993-09-30 Siemens Ag X=ray image intensifier tube - has two separate isolated anode parts, one part near output screen receiving voltage lower than accelerating voltage applied to other part nearer to output screen
DE4342217C1 (en) * 1993-12-10 1995-03-30 Siemens Ag X-ray image intensifier and method for its production
DE19535553A1 (en) * 1995-09-25 1997-01-23 Siemens Ag X=ray image amplifier for X=ray diagnostic appts.
DE19854199C1 (en) * 1998-11-24 2000-03-30 Siemens Ag X-ray picture enhancer comprises an anode ceramic sleeve which surrounds the anode and which forms part of the vacuum housing, and an inner electrode.
EP1670031A1 (en) * 2003-09-10 2006-06-14 Hamamatsu Photonics K.K. Electron tube

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US5874728A (en) * 1996-05-02 1999-02-23 Hamamatsu Photonics K.K. Electron tube having a photoelectron confining mechanism

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DE4208540A1 (en) * 1992-03-17 1993-09-30 Siemens Ag X=ray image intensifier tube - has accelerating and braking voltages supplied to anode and phosphor-coated output screen respectively with lower voltage on output screen
DE4208538A1 (en) * 1992-03-17 1993-09-30 Siemens Ag X=ray image intensifier tube - has two separate isolated anode parts, one part near output screen receiving voltage lower than accelerating voltage applied to other part nearer to output screen
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Also Published As

Publication number Publication date
JP2558910Y2 (en) 1998-01-14
JPH0377358U (en) 1991-08-02
DE58907799D1 (en) 1994-07-07
US5155349A (en) 1992-10-13
EP0429694B1 (en) 1994-06-01

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