DE726884C - Cathode ray tubes with several separately controllable beam bundles - Google Patents

Cathode ray tubes with several separately controllable beam bundles

Info

Publication number
DE726884C
DE726884C DEK154930D DEK0154930D DE726884C DE 726884 C DE726884 C DE 726884C DE K154930 D DEK154930 D DE K154930D DE K0154930 D DEK0154930 D DE K0154930D DE 726884 C DE726884 C DE 726884C
Authority
DE
Germany
Prior art keywords
cathode
cathode ray
ray tube
electrode
tube according
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
DEK154930D
Other languages
German (de)
Inventor
Dr-Ing Max Knoll
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.)
Telefunken AG
Original Assignee
Telefunken AG
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
Priority to DEL80776D priority Critical patent/DE768131C/en
Priority to DEK154930D priority patent/DE726884C/en
Application filed by Telefunken AG filed Critical Telefunken AG
Priority to GB18361/34A priority patent/GB417714A/en
Priority to US660117A priority patent/US2049781A/en
Priority to GB7117/33A priority patent/GB417850A/en
Priority to FR753487D priority patent/FR753487A/en
Priority to GB18360/34A priority patent/GB417713A/en
Priority to GB18359/34A priority patent/GB420876A/en
Priority to BE394911D priority patent/BE394911A/xx
Priority to US70423A priority patent/US2141414A/en
Application granted granted Critical
Publication of DE726884C publication Critical patent/DE726884C/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
    • H01J29/46—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
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • 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
    • 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
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • 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
    • H01J29/48—Electron guns
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • 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
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Kathodenstrahlröhre mit mehreren getrennt voneinander steuerbaren Strahlbündeln Die bei den bekannten Mehrfachkathodenoszillographen bzw. Mehrfachfernsehröhren notwendige Sammlung des Strahlbündels ist auf verschiedene Weise, z. B. mittels im Strahlbereich ,durch Stoß gebildeter positiver. Ionen, .erreicht worden. Um diese Methode anwenden .zu können, muß jedoch der Gasdruck innerhalb der Röhre beträchtlich erhöht werden, so däß während des Betriebes außerordentlich hohe Gitterströme zwischen den Ablenkplatten fließen, die bekanntlich sehr unerwünscht sind- Auch .die Strahlkonzentration durch eine Sammelspule ist häufig wegen des erforderlichen Stromverbrauches und Materialaufwandes unerwünscht.Cathode ray tube with several separately controllable Beam bundles The well-known multiple cathode oscilloscopes or multiple television tubes necessary collection of the beam is in various ways, e.g. B. by means of in the beam area, positive formed by impact. Ions. Has been achieved. Around To be able to use the method, however, the gas pressure within the tube must be considerable are increased, so that extremely high grid currents between during operation the baffles flow, which are known to be very undesirable - also .the beam concentration by a collecting coil is often because of the required power consumption and Material expenditure undesirable.

Die vorliegende Anordnung bezieht sich auf eine Ausführung solcher Röhren für mehrere Strahlbün.del und bezweckt, mit möglichst geringem Aufwand an Mitteln eine möglichst hohe Stromdichte bzw. eine für den Verwendungszweck möglichst günstige Form der gesteuerten Strahlbündel in Höhe des Leuchtschirmes zu erreichen.The present arrangement relates to an implementation of such Tubes for several beam bundles and intended with the least possible effort Means as high a current density as possible or one for the purpose as possible to achieve favorable shape of the controlled beam at the height of the luminescent screen.

Bei einer Kathodenstrahlröhre mit mehreren getrennt voneinander steuerbaren Strahlbündeln sind erfindungsgemäß zur Erzielung zweier oder mehrerer scharfer Brennpunkte bzw. Brennstriche auf dem Leuchtschirm in unmittelbarer Nähe der Kathode mehrere Hilfselektroden vorgesehen, die eine Mehrzahl. in jeder Elektrode nebeneinander- und in den verschiedenen Elektroden hintereinanderliegender, paarweise getrennte Elektronenlinsen bildender Öffnungen aufweisen. Die Anordnung der vorliegenden Art beruht auf der Erkenntnis, daß bei einer elektrischen Linse hoher Brechungszahl die Richtung der austretenden Elektronen von der Richtung der eintretenden Elektronen weitgehend unabhängig ist (vgl. K n o 11 und R u s k a , Ann. d. Phys., Bd. 12, S. 607 ... 661, 193a). Entsprechend der Gleichung für die elektrische Brechungszahl. worin E" die Beschleunigungsspannung der Elektronen in der elektrischen Linse und E die .der Eintrittsgeschwindigkeit entsprechende Spannung der Elektronen ist, muß zur Einhaltung dieser Bedingungen Eo sehr groß gegenüber E gewählt werden.In the case of a cathode ray tube with several separately controllable beam bundles, several auxiliary electrodes are provided according to the invention in order to achieve two or more sharp focal points or focal lines on the luminescent screen in the immediate vicinity of the cathode. in each electrode side by side and in the various electrodes one behind the other, pairwise separated electron lenses forming openings. The arrangement of the present type is based on the knowledge that with an electric lens with a high refractive index, the direction of the exiting electrons is largely independent of the direction of the entering electrons (cf. K no 11 and R uska, Ann. D. Phys., Vol. 12, pp. 607 ... 661, 193a). According to the equation for the electrical refractive index. where E "is the acceleration voltage of the electrons in the electric lens and E is the voltage of the electrons corresponding to the entry velocity, Eo must be chosen to be very large compared to E in order to maintain these conditions.

Bringt man nun gemäß der vorliegenden Anordnung eine elektrische Linse, an der ganz oder nahezu die Betriebsspannung (Anodenspannung) der Röhre liegt, in unmittelbare Nähe .der Glühkathode, aus der bekanntlich die Elektronen mit nur kleinen Geschwindigkeitskomponenten (von der Größenordnung i Volt) austreten, so erhält man in einem Abstand, der dem Krümmungsr.adius der Linse entspricht, einen scharfen Elektronenbrennfleck, in dem im Gegensatz zu den bekannten Anordnungen der größte Teil der von der Glühkathode ausgestrahlten Elektronen sich wiederfindet. Dabei kann die elektrische Linse in an sich bekannter Weise .durch Blendenanordnungen verschiedener Form hergestellt sein. Als besonders zweckmäßig und einfach haben sich Elektronenanordnungen erwiesen, bei denen das linsenartig wirkende elektrische Feld an runden Öffnungen in der der Kathode zunächst liegenden Elektrodenfläche zwischen dieser und der Glühkathode entsteht. Mit Hilfe von spaltförmigen Öffnungen in .der der Kathode zunächst liegenden Elektrodenfläche lassen sich an Stelle eines Elektronenbrennpunktes auch ein oder mehrere Elektronenstriche auf dem Leuchtschirm h.erstel lien.If, according to the present arrangement, an electrical lens, on which the operating voltage (anode voltage) of the tube is completely or almost entirely, is brought into the immediate vicinity of the hot cathode, from which, as is well known, the electrons emerge with only small velocity components (of the order of magnitude of one volt), In this way, at a distance corresponding to the radius of curvature of the lens, a sharp electron focal point is obtained, in which, in contrast to the known arrangements, most of the electrons emitted by the hot cathode are found. The electrical lens can be produced in a manner known per se. By diaphragm arrangements of various shapes. Electron arrangements have proven to be particularly useful and simple in which the lens-like electrical field is created at round openings in the electrode surface lying next to the cathode between the latter and the hot cathode. With the aid of slit-shaped openings in the electrode surface that is closest to the cathode, one or more electron lines can be made on the luminescent screen instead of an electron focal point.

Infolge der geringen Eintrittsgeschwindigkeit der Elektronen kommt es auf Form und Lage der Glühkathode nicht genau an; es können alle bekannten Glühkathodenformen einschließlich der indirekt geheizten Verwendung finden. Es kann auch zweckmäßig sein, für jede Einzellinse eine eigene Glühkathode vorzusehen.As a result of the low entry speed of the electrons the shape and position of the hot cathode are not exactly accurate; all known hot cathode shapes can be used including indirectly heated use. It can also be expedient be to provide a separate hot cathode for each individual lens.

Gegenüber den bekannten Fernsehröhren und Kathodenstrahloszillographen ergibt sich als Vorteil der Fortfall einer eigenen Sammelvorrichtung im Ablenkraum und damit eine Verkürzung der Baulänge durch Wegfall der bisher zur Erzielung eines kleinen Brennfleckes nötigen Gegenstandsweite zwischen Sammelvorrichtung und Anodenblende.Compared to the well-known television tubes and cathode ray oscillographs The advantage is that there is no need for a separate collecting device in the deflection space and thus a shortening of the overall length by eliminating the previously used to achieve a small focal point necessary object distance between collecting device and anode screen.

In der- Abbildung ist ,eine Ausführungsform der Erfindung beispielsweise dargestellt, und zwar eine Kathodenstrahlröhre für Fernsehen bzw. Meßzwecke mit zwei getrennt voneinander steuerbaren Strahlbündeln. Sie dient zur Erzeugung zweier voneinander imabhängiger Bilder für Fernsehzwecke oder als Zweifach- bzw. Mehrfach:kathodenstr.ahloszillograph zur Aufnahme zweier bzw. mehrerer Osziilogramme unabhängig voneinander und enthält die beiden parallel geschalteten, ,durch die Batterie 2 geheizten Glühkathoden i und i' und eine aus den Elektroden 3 und q. bestehende Z,#veifachsammell.in.se mit Öffnungen 17, die bei richtiger Einstellung der Batterie 16 auf dem Leuchtschirm 2o zwei mit Hilfe der AblenkplattensYsteMe 5, 5', 6 und 21 unabhängig voneinander steuerbare Brennflecke erzeugen. 9 ist die Anodenbatterie der Röhre. Während der N ichtaufnahmezeit dienen die -,3"blenkplatten 22, 23, 24. und die Blenden 25, 26 zur Strahlsperrung.In the figure, one embodiment of the invention is for example shown, namely a cathode ray tube for television or measurement purposes with two separately controllable beam bundles. It is used to generate two interdependent images for television purposes or as double or multiple: cathode line oscillograph for recording two or more oscillograms independently of one another and contains the two hot cathodes connected in parallel and heated by the battery 2 i and i 'and one of electrodes 3 and q. existing Z, # veifachsammell.in.se with Openings 17, which when the battery 16 is correctly adjusted on the luminescent screen 2o two with the help of the baffle systems 5, 5 ', 6 and 21 independently of each other generate controllable focal spots. 9 is the anode battery of the tube. During the The 3 "baffles 22, 23, 24 and the diaphragms 25, 26 are not used for recording time to block the beam.

Claims (5)

PATENTANSPRÜCHE: i. Kathodenstrahlröhre mit mehreren getrennt voneinander steuerbaren Strahlbündeln, .dadurch gekennzeichnet, daß zur Erzielung zweier oder -mehrerer scharfer Brennpunkte bzw. Brennstriche auf dem Leuchtschirm in unmittelbarer Nähe der Kathode mehrere Hilfselektroden vorgesehen sind, die eine Mehrzahl in jeder Elektrode nebeneinander- und in den verschiedenen Elektroden hintereinanderl.egen.der, paarweise getrennte Elektronenlinsen bildender Öffnungen aufweisen. PATENT CLAIMS: i. Cathode ray tube with several separated from each other controllable beam bundles,. characterized in that to achieve two or -Several sharp focal points or lines of fire on the luminescent screen in the immediate vicinity Near the cathode several auxiliary electrodes are provided, a plurality in each Electrode next to each other and in the various electrodes one behind the other. have electron lens forming openings separated in pairs. 2. Kathodenstrahlröhre nach Anspruch i, dadurch gekennzeichnet, daß die elektrische Linse aus zwei flächenförmigen, senkrecht zur Strahlachse liegenden Elektroden besteht, von denen nie kathodenfernere auf gegenüber der Kathode positivem Potential, ;die kathodennähere auf oder nahezu auf Kathodenpotential liegen. 2. Cathode ray tube according to claim i, characterized in that the electrical lens consists of two flat, There are electrodes lying perpendicular to the beam axis, of which the cathode is never further away to a positive potential in relation to the cathode,; the one closer to the cathode on or almost are at cathode potential. 3. Kathodenstrahlröhre nach Anspruch 2, dadurch gekennzeichnet; daß die auf oder nahezu auf Kathodenpotential liegende Elektrode aus einer Schieibe besteht, die eine oder mehrere runde oder rechteckige Öffnungen hat, so daß das zwischen dieser Elektrode und derGegenelektrode (Anode) verlaufende elektrische Feld auf der der Anode abgewandten Seite der Öffnungen die Wirkung .einer stark brechenden Linse auf die Elektronen ,ausübt. .I. 3. Cathode ray tube according to claim 2, characterized in that; that the electrode lying at or almost at cathode potential consists of a disk exists, which has one or more round or rectangular openings, so that the between this electrode and the counter electrode (anode) Field on the side of the openings facing away from the anode has a strong effect refractive lens on the electrons. .I. Kathodenstrahlröhre nachAnspruch i, 2 oder 3, dadurch gekennzeichnet, daß die Schärfe der Elektronenbrennflecke auf den Leuchtschirm durch Verändern der Brennweite mit Hilfe der Spannung zwischen .den beiden Hilfselektroden einstellbar ist. Cathode ray tube according to claim i, 2 or 3, characterized in that the sharpness of the electron focal spots on the fluorescent screen by changing the focal length with the help of the voltage between . Can be set using the two auxiliary electrodes. 5. Kathodenstrahlröhre nach Anspruch i oder einen der folgenden, dadurch gekennzeichnet, daß die auf oder nahezu auf Kathodenpotential liegende Linsenelektrode so viele runde Öffnungen hat, wie Strahlbündel erzeugt werden sollen.5. Cathode ray tube according to claim i or one of the following, characterized in that the on or almost on The lens electrode at cathode potential has as many round openings as a bundle of rays should be generated.
DEK154930D 1932-03-18 1932-03-24 Cathode ray tubes with several separately controllable beam bundles Expired DE726884C (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DEL80776D DE768131C (en) 1932-03-18 1932-03-18 Braun's tube, in which all electrodes are held using holders attached to the pinch foot
DEK154930D DE726884C (en) 1932-03-18 1932-03-24 Cathode ray tubes with several separately controllable beam bundles
US660117A US2049781A (en) 1932-03-18 1933-03-09 Braun tube especially for television purposes
GB7117/33A GB417850A (en) 1932-03-18 1933-03-09 Braun tube
GB18361/34A GB417714A (en) 1932-03-18 1933-03-09 Braun tube
FR753487D FR753487A (en) 1932-03-18 1933-03-09 Cathode ray tube
GB18360/34A GB417713A (en) 1932-03-18 1933-03-09 Improvements in and relating to cathode ray-tubes
GB18359/34A GB420876A (en) 1932-03-18 1933-03-09 Braun tube
BE394911D BE394911A (en) 1932-03-18 1933-03-10
US70423A US2141414A (en) 1932-03-18 1936-03-23 Braun tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL80776D DE768131C (en) 1932-03-18 1932-03-18 Braun's tube, in which all electrodes are held using holders attached to the pinch foot
DEK154930D DE726884C (en) 1932-03-18 1932-03-24 Cathode ray tubes with several separately controllable beam bundles

Publications (1)

Publication Number Publication Date
DE726884C true DE726884C (en) 1942-10-22

Family

ID=7253160

Family Applications (2)

Application Number Title Priority Date Filing Date
DEL80776D Expired DE768131C (en) 1932-03-18 1932-03-18 Braun's tube, in which all electrodes are held using holders attached to the pinch foot
DEK154930D Expired DE726884C (en) 1932-03-18 1932-03-24 Cathode ray tubes with several separately controllable beam bundles

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DEL80776D Expired DE768131C (en) 1932-03-18 1932-03-18 Braun's tube, in which all electrodes are held using holders attached to the pinch foot

Country Status (5)

Country Link
US (2) US2049781A (en)
BE (1) BE394911A (en)
DE (2) DE768131C (en)
FR (1) FR753487A (en)
GB (4) GB420876A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100826B (en) * 1955-05-27 1961-03-02 Telefunken Gmbh Electrode arrangement for the common focusing of electron beams of a multiple cathode ray tube running in one plane
DE1156521B (en) * 1961-09-05 1963-10-31 Heraeus Gmbh W C Electron beam gun for heating metals
DE1789136A1 (en) * 1967-01-14 1973-07-05 Sony Corp CATHODE RAY TUBE

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763222C (en) * 1938-08-23 1954-10-04 Siemens & Halske A G Indirectly heated glow cathode for electron beam tubes
US2482151A (en) * 1944-08-18 1949-09-20 Philips Lab Inc Cathode-ray projection tube
US2570165A (en) * 1949-08-16 1951-10-02 Rca Corp Limited-area cathode
US2755413A (en) * 1951-02-23 1956-07-17 Edgar R Wagner Gas filled projector tubes for television
US2963608A (en) * 1957-08-07 1960-12-06 Sylvania Electric Prod Cathode ray tube structure
US3143681A (en) * 1959-12-07 1964-08-04 Gen Electric Spiral electrostatic electron lens
US3240973A (en) * 1962-03-01 1966-03-15 Rca Corp Electrostatic saddle field collimating system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565855A (en) * 1920-11-26 1925-12-15 Western Electric Co Vacuum tube
US1632080A (en) * 1921-12-27 1927-06-14 Western Electric Co Electric discharge device
DE488933C (en) * 1925-08-09 1930-01-09 Siemens Schuckertwerke Akt Ges Brown tube with glow cathode and noble gas filling
DE507879C (en) * 1927-01-01 1930-09-20 Hans Mueri Dr Dishwasher
FR699478A (en) * 1929-10-25 1931-02-16 Improvements to cathode ray tubes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100826B (en) * 1955-05-27 1961-03-02 Telefunken Gmbh Electrode arrangement for the common focusing of electron beams of a multiple cathode ray tube running in one plane
DE1156521B (en) * 1961-09-05 1963-10-31 Heraeus Gmbh W C Electron beam gun for heating metals
DE1789136A1 (en) * 1967-01-14 1973-07-05 Sony Corp CATHODE RAY TUBE

Also Published As

Publication number Publication date
GB417850A (en) 1934-10-09
US2049781A (en) 1936-08-04
GB420876A (en) 1934-12-10
FR753487A (en) 1933-10-16
US2141414A (en) 1938-12-27
GB417713A (en) 1934-10-09
GB417714A (en) 1934-10-09
BE394911A (en) 1933-04-29
DE768131C (en) 1956-03-15

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