DE2652070A1 - Image converter with input and output windows - has spacing ring with two sections of different diameters on inner surface - Google Patents

Image converter with input and output windows - has spacing ring with two sections of different diameters on inner surface

Info

Publication number
DE2652070A1
DE2652070A1 DE19762652070 DE2652070A DE2652070A1 DE 2652070 A1 DE2652070 A1 DE 2652070A1 DE 19762652070 DE19762652070 DE 19762652070 DE 2652070 A DE2652070 A DE 2652070A DE 2652070 A1 DE2652070 A1 DE 2652070A1
Authority
DE
Germany
Prior art keywords
image converter
window
converter according
diameter
entrance
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
Application number
DE19762652070
Other languages
German (de)
Other versions
DE2652070C2 (en
Inventor
Guenter Flasche
Kurt Dr Frank
Hans-Wolfgang Dipl Ing Funk
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.)
Proxitronic Funk GmbH and Co KG
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19762652070 priority Critical patent/DE2652070C2/en
Priority to JP14666976A priority patent/JPS52135262A/en
Priority to GB51269/76A priority patent/GB1528679A/en
Priority to NL7613718A priority patent/NL7613718A/en
Priority to FR7637366A priority patent/FR2335035A1/en
Publication of DE2652070A1 publication Critical patent/DE2652070A1/en
Priority to US05/967,620 priority patent/US4293790A/en
Application granted granted Critical
Publication of DE2652070C2 publication Critical patent/DE2652070C2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/06—Electrode arrangements
    • H01J43/18—Electrode arrangements using essentially more than one dynode
    • H01J43/24—Dynodes having potential gradient along their surfaces
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • 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
    • H01J31/505—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output flat tubes, e.g. proximity focusing tubes

Landscapes

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

Abstract

Image converter consisting of an evacuated container with a light transmitting input window and an output window. The output window is on the opposite side to the input window. A photocathode is mounted on the inside of the input window and a light screen mounted on the inside of the output window. There is a spacing ring (6) between the input window (1) and the output window (3). The distance between the input window and the output window is small compared to the diameter of the image converter. The input window and output window are in parallel planes. The inner surface of the spacing ring has two sections of different diameters and the transition from one diameter to the other is approximately parallel to the windows.

Description

Bildwandler Image converter

Die Erfindung betrifft einen Bildwandler nach Patentanmeldung P 25 55 438.The invention relates to an image converter according to patent application P 25 55 438.

Beim Betrieb des in der Hauptanmeldung beschriebenen Bildwandlers hat es sich als nachteilig herausgestellt, wenn senkrecht zu den Äquipotentiallinien des zwischen Fotokathode und Bildschirm befindliclien elektrizchen Feldes elektrisch isolierende Flächen angeordnet sind, die durch Ladungsakkumulation infolge zufälliger Elektroneneinission zu Überschlägen führen können.When operating the image converter described in the main application it has been found to be disadvantageous when perpendicular to the equipotential lines of the electric field located between the photocathode and the screen insulating surfaces are arranged by charge accumulation as a result of accidental Electron emission can lead to flashovers.

Der erfindungsgemäße Bildwandler mit dem kennzeichenden Merkmal des Hauptanspruches hat dengegenüber den Vorteil, daß keine oberschläge mehr erfolgen können.The image converter according to the invention with the characteristic feature of On the other hand, the main claim has the advantage that there are no more overlaps can.

Durch die in den Unteranspruchen aufgeführten Merkmale sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Bildwandlers möglich. Besonders vorteilhat ist, wenn der Abstandsring aus elektronisch leitendem Glas besteht bzw. eine elektrisch schwach leitende Oberfläche aufweist, weil dieser dadurch eine definierte I'eitfähigkeit hat und lawinenartige Entladungen auf der inneren Oberfläche des Ringes vermieden werden.The features listed in the subclaims are advantageous Further developments and improvements of the image converter specified in the main claim possible. It is particularly advantageous if the spacer ring is made of electronically conductive There is glass or has a surface that is poorly electrically conductive because it thus has a defined conductivity and avalanche-like discharges on the inner surface of the ring can be avoided.

Ausführungsbeispiele dgr Erfindung sind in der Zeichnung anhand der Figuren 1 und 2 dargestellt und in der nachfolgenden Beschreibung näher erläutert. In den Figuren vorkommende gleiche Teile sind mit gleichen Bezugszeichen versehen. Die Figuren 1 und 2 zeigen jeweils einen Schnitt durch den erfindungsgemäßen Bildwandler.Embodiments of the invention are shown in the drawing with reference to Figures 1 and 2 and explained in more detail in the following description. The same parts appearing in the figures are provided with the same reference symbols. Figures 1 and 2 each show a section through the image converter according to the invention.

Der Bildwandler gemäß Fig. 1 besteht aus einem evakuierten Gefäß mit einem Eingangsfenster 1, auf dessen Innenseite eine Fotokathode 2 aufgebracht ist, einem Ausgangsfenster 3 mit einer kegelstumpfförmigen Erhebung 12, auf deren Schnittfläche ein Beushtschirm 4 aufgebracht ist, und einen zwischen Eingang-und Ausgangsfenster angeordnetem Abstandsring 6'. Zum Anschluß einer Betriebsspannungsquelle an den Bildwandler ist sowohl die Fotokathode 2 als auch der Leuchtschirm 4 jeweils mit einer Anschlußklemme 7 bzw. 8 verbunden.The image converter according to FIG. 1 consists of an evacuated vessel with an entrance window 1, on the inside of which a photocathode 2 is applied, an exit window 3 with a frustoconical elevation 12 on the sectional surface thereof a shower screen 4 is applied, and one between the entrance and exit windows arranged spacer ring 6 '. For connecting an operating voltage source to the Both the photocathode 2 and the luminescent screen 4 each have an image converter a terminal 7 or 8 connected.

Ein zn veistärkendes oder zu wandelndes Bild wird durch das Fenster 1 auf die Fotokathode 2 geworfen. Entsprechend der durch das Bild erzeugten Beleuchtungsstärke werden aus der Fotokathode 2 Elektronen ausgelöst, welche sich infolge des dort herrschenden wesentlich positiveren Potentials zl7m Beuchtschirn 4 hinbewegen. Auf dem Leuchtschirm 4 ist ein dem Eingang bild entsprechendes verstärktes Bild zu sehen.A picture to be strengthened or to be transformed appears through the window 1 thrown onto the photocathode 2. According to the illuminance generated by the image 2 electrons are released from the photocathode, which are due to the there Move the prevailing, much more positive potential towards the front panel 4. on the luminescent screen 4 can be seen an amplified image corresponding to the input image.

Der Abstandsring 6' gemäß Fig. 1 bzw. 6" gemäß Fig. 2 ist so geformt, daß er in unmittelbarer Nachbarschaft des Fensters 1 einen Vorsprung aufweist, wodurch auf der Innenseite des Abstandsringes evtl. ausgelöste Elektronen nicht wieder auf der Innenseite landen können und dabei Sekundärelektronen auslösen können. Zur weiteren Verhinderung von lawinenartigen Entladungen kann der Abstandsring 6' bzw. 6" erfindungsgemaß aus elektronisch leitendem Glas bestehen oder eine elektrisch schwach leitende Oberfläche aufweisen.The spacer ring 6 'according to FIG. 1 or 6 "according to FIG. 2 is shaped so that it has a projection in the immediate vicinity of the window 1, whereby Electrons that may have been released on the inside of the spacer ring do not reappear the inside and can trigger secondary electrons. To further According to the invention, the spacer ring 6 'or 6 "can prevent avalanche-like discharges consist of electronically conductive glass or an electrically weakly conductive surface exhibit.

Rings um die kreisförmige Fotokathode 2 ist ein ringförmiges Metallgetter 13' aufgebracht.Around the circular photocathode 2 is an annular metal getter 13 'applied.

Claims (6)

Patentansprüche 1. Bildwandler, bestehend aus einem evakuierten Gefäß mit sich gegenüberliegendem lichtdurchlässigem Eingangs- und Ausgangsfenster, wobei auf der Innenseite des Eingangsfensters eine Fotokathode und auf der Innenseite des Ausgangsfensters ein Leuchtschirm vorgesehen sind, und der Abstand zwischen Eingangs- und Ausgangsfenster klein gegenüber dem Durch messer des Bildwandlers ist, wobei Eingangs- und Çusgangsfenster planparallel sind und zwischen diesen Fenstern ein Abstandsring angeordnet ist, dessen Innenfläche wenigstens zwei Abschnitte unterschiedlichen Durclmessers aufbseist, nach Patentanmeldung P 25 55 438, dadurch gekennzeichnet, daß der Übergang vom einen zum anderen Durcamesser allmählich verläuft. Claims 1. Image converter, consisting of an evacuated vessel with opposed translucent entrance and exit windows, where a photocathode on the inside of the entrance window and on the inside of the exit window a fluorescent screen are provided, and the distance between The entrance and exit windows are small compared to the diameter of the image converter where the entrance and exit windows are plane-parallel and between these windows a spacer ring is arranged, the inner surface of which is at least two sections different Diameter, according to patent application P 25 55 438, characterized in that that the transition from one to the other Durcamesser is gradual. 2. Bildwandler nach Anspruch 1, dadurch gekennzeichnet, daß der Uebergang vom einen zum anderen Durchmesser S-formig verläuft.2. Image converter according to claim 1, characterized in that the transition runs in an S-shape from one diameter to the other. 3. Bildwandler nach Anspruch 1, dadurch gekennzeichnet, daß der uebergang vom einen zum anderen Durchmesser linear verläuft.3. Image converter according to claim 1, characterized in that the transition runs linearly from one diameter to the other. 4. Bildwandler nach Anspruch 1, dadurch gekennzeichnet, daß die Innenfläche des Abstandsringes als Mantelfläche eines Kegelstumpfes ausgebildet ist.4. Image converter according to claim 1, characterized in that the inner surface of the spacer ring is designed as a lateral surface of a truncated cone. 5. Bildwandler nach Anspruch 1, dadurch gekennzeichnet, daß der Abstandsring aus elektronisch leitendem Glas besteht.5. Image converter according to claim 1, characterized in that the spacer ring consists of electronically conductive glass. 6. Bildwandler nach Anspruch 1, dadurch gekennzeichnet, daß der Abstandsring eine elektrisch schwachleitende Oberfläche aufweist.6. Image converter according to claim 1, characterized in that the spacer ring an electrically weakly conductive surface having. 7, Bildwandler nach Anspruch 1, dadurch gekennzeichnet, daß ein ringförmiges Metallgetter auf der Innenseite des Eingangsfenster rings um die Fotokathode angeordnet ist.7, image converter according to claim 1, characterized in that an annular Metal getters arranged on the inside of the entrance window around the photocathode is.
DE19762652070 1975-12-10 1976-11-15 Imager Expired DE2652070C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19762652070 DE2652070C2 (en) 1976-11-15 1976-11-15 Imager
JP14666976A JPS52135262A (en) 1975-12-10 1976-12-08 Picture converter
GB51269/76A GB1528679A (en) 1975-12-10 1976-12-08 Image converter or intensifier device
NL7613718A NL7613718A (en) 1975-12-10 1976-12-09 IMAGE CONVERTER.
FR7637366A FR2335035A1 (en) 1975-12-10 1976-12-10 IMAGE TRANSFORMER
US05/967,620 US4293790A (en) 1975-12-10 1978-12-06 Image converter having cylindrical housing and photocathode separated by spacing element from luminescent screen on frustrum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762652070 DE2652070C2 (en) 1976-11-15 1976-11-15 Imager

Publications (2)

Publication Number Publication Date
DE2652070A1 true DE2652070A1 (en) 1978-05-24
DE2652070C2 DE2652070C2 (en) 1983-07-28

Family

ID=5993220

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762652070 Expired DE2652070C2 (en) 1975-12-10 1976-11-15 Imager

Country Status (1)

Country Link
DE (1) DE2652070C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961026A (en) * 1988-02-13 1990-10-02 Proxitronic Funk Gmbh & Co. Kg Proximity focused image intensifier having a glass spacer ring between a photocathode and a fluorescent screen disk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE710391C (en) * 1936-09-06 1941-09-12 Georg Weiss Dipl Ing Secondary electron amplifier
US2929949A (en) * 1956-02-11 1960-03-22 Nat Res Dev Method of and apparatus for electron multiplication
US3458744A (en) * 1966-06-02 1969-07-29 Optics Technology Inc Electro-optic image intensifier and method of making same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE710391C (en) * 1936-09-06 1941-09-12 Georg Weiss Dipl Ing Secondary electron amplifier
US2929949A (en) * 1956-02-11 1960-03-22 Nat Res Dev Method of and apparatus for electron multiplication
US3458744A (en) * 1966-06-02 1969-07-29 Optics Technology Inc Electro-optic image intensifier and method of making same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ABC Technik und Naturwissenschaft, Bd. 1, Verlag Harri Deutsch, Frankfurt/Main 1970, S. 458,459 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961026A (en) * 1988-02-13 1990-10-02 Proxitronic Funk Gmbh & Co. Kg Proximity focused image intensifier having a glass spacer ring between a photocathode and a fluorescent screen disk

Also Published As

Publication number Publication date
DE2652070C2 (en) 1983-07-28

Similar Documents

Publication Publication Date Title
EP0360906B1 (en) X-ray image intensifier
DE1921944A1 (en) Cathode ray tube
DE3001983C2 (en)
DE2807242A1 (en) IMAGE AMPLIFIER TUBE
DE2652070A1 (en) Image converter with input and output windows - has spacing ring with two sections of different diameters on inner surface
DE1087721B (en) Image converter tube
DE940182C (en) Cathode ray tube type electrostatic storage tubes and methods of making them
DE2528276A1 (en) HIGH VOLTAGE CONNECTION ON THE PISTON OF A CATODE RAY TUBE
DE2703093C2 (en) Color television tube
DE3833133C2 (en) Method for producing an electrode system for an X-ray image intensifier
DE8812346U1 (en) X-ray image intensifier
DE3804516A1 (en) IMAGE AMPLIFIER
DE936941C (en) Electron beam tubes, in particular picture tubes for television reception purposes, with electrostatic focusing
DE2461265C3 (en) Electronic X-ray image intensifier
EP1147543A1 (en) Tube neck for cathode-ray tube
DD219335A5 (en) electron beam
DE2203853B2 (en) IMAGE AMPLIFIER DIODE OR IMAGE CONVERTER TUBE
DE3151326A1 (en) Method of producing an electronic tube
DE2300630C3 (en) Cathode arrangement for a high voltage vacuum tube
DE1539493C (en) Glow discharge lamp
DE747206C (en) Electrode arrangement for cathode ray tubes
DE29706317U1 (en) Vacuum interrupter
DE2257215A1 (en) IMAGE AMPLIFIER TUBE
DE2542545A1 (en) Flashover suppressing device for CRT - has low resistance conductive coating on inner wall of CRT funnel coupled to HV terminal
DE1564818C3 (en) Arrangement for protecting oxide cathodes in cathode ray tubes

Legal Events

Date Code Title Description
OI Miscellaneous see part 1
OGA New person/name/address of the applicant
OF Willingness to grant licences before publication of examined application
OGA New person/name/address of the applicant
OD Request for examination
D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: PROXITRONIC FUNK GMBH & CO KG, 6140 BENSHEIM, DE