EP0278302A1 - Flash lamp - Google Patents

Flash lamp Download PDF

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Publication number
EP0278302A1
EP0278302A1 EP88101036A EP88101036A EP0278302A1 EP 0278302 A1 EP0278302 A1 EP 0278302A1 EP 88101036 A EP88101036 A EP 88101036A EP 88101036 A EP88101036 A EP 88101036A EP 0278302 A1 EP0278302 A1 EP 0278302A1
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EP
European Patent Office
Prior art keywords
electrodes
flash lamp
electrode
discharge space
melted
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.)
Ceased
Application number
EP88101036A
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German (de)
French (fr)
Inventor
Ingo Dipl.-Phys. Dünisch
Dieter Eierle-Tschirner
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 EP0278302A1 publication Critical patent/EP0278302A1/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/10—Shields, screens, or guides for influencing the discharge
    • H01J61/103—Shields, screens or guides arranged to extend the discharge path

Definitions

  • the invention relates to a flash lamp with a housing in which two electrodes are melted, which protrude into a discharge space.
  • the flash lamp can be bent into a ring to achieve high luminance levels.
  • a ring that is as narrow as possible and as closed as possible is ideal, both from the point of view of symmetry and from the imaging properties in the assigned reflector.
  • the bending radius of a glass tube can be made relatively small, but the discharge arc running in the tube places the greatest stress on the tube wall on the inside of the curve. The stress increases with the reduction of the bending radius and can lead to glass evaporation.
  • the invention is accordingly based on the object of designing a flash lamp of the type mentioned at the outset in such a way that, when the discharge space is as narrow and strongly curved as possible, overuse at the strongly curved points is avoided.
  • the discharge space between the two electrodes is annular and that the outer walls are made of glass and the inner walls are made of white ceramic material which is hermetically fused to the glass. Ceramic material withstands the hot arc much better than glass, so that the discharge space can be bent very much.
  • FIG. 1 shows a flash lamp with a housing having an outer wall 1, which is closed by an upper part 2 and a lower part 3.
  • an electrode 4 is melted in the center and a second electrode 5 is eccentrically melted.
  • a ceramic partition 7, which surrounds the electrode 4 and leaves an opening 6, and which is fused to the outer wall 1 with an extension 8.
  • the electrode 5 lies between the outer wall 1 and the ceramic partition 4.
  • the ceramic partition 4 consists of white ceramic material, which reflects the light radiation arising in the annular discharge space 9 well to the outside. It is hermetically fused to the glass parts and forces the discharge to make an annular detour and to pass through the opening 6 to the electrode 5 forming the cathode.
  • FIG. 3 again has an outer wall 1 which, like components 1, 2, 3 in the example according to FIGS. 1 and 2, is made of glass.
  • the outer wall 1 forming a hollow cylinder is covered above and below, as in the example according to FIGS. 1 and 2.
  • two electrodes 10, 11 are melted eccentrically, which are partially enclosed by shoulders 12a of an approximately T-shaped ceramic partition 12 made of white ceramic material.
  • the middle approach 13 of the Kera Miktrennwand 12 is guided to the outer wall 1 and hermetically fused with this.
  • the arc is also forced in this example to take an annular course from the electrode 11 forming the anode to the electrode 10 forming the cathode in the annular discharge space 14.
  • Two openings 15 allow the discharge to pass through.
  • the embodiment according to FIG. 4 differs from the embodiment according to FIG. 3 in that conductor pieces 18, 19 lead from the electrodes 16, 17 into the annular discharge space 20, the space immediately adjacent to the electrodes 16, 17 being closed off by a white ceramic partition wall 21 , which rests on the conductor pieces 18, 19 with two legs 22 and is fused to the outer wall 1 again with a middle shoulder 20.
  • a hollow cylindrical outer wall 1 made of glass is again provided, which is hermetically sealed by an upper part 23, which is also made of glass, and a lower part 24, which is made of glass.
  • an electrode 25 forming the anode and in the lower part 24, an electrode 26 forming the cathode are melted centrally.
  • the H-shaped ceramic separating part 27 made of white ceramic material which is hermetically fused to the upper part 23 and the lower part 24 and has openings for the formation of the annular discharge space 28 as a plasma channel. 4 one of these openings is visible and designated 29. A corresponding opening is located in the area of the electrode 26.
  • the flash lamp according to FIGS. 5 and 6 is particularly compact since the interior of the core is used by the electrodes 25, 26.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

It is intended to produce a flash lamp in which high radii of curvature are permissible, without overloading the walls, with a curved plasma channel so that a high illumination density is produced. To this end, the discharge space (9) is designed in annular form between the two electrodes (4, 5). The outer wall (1) forms a sealed hollow cylinder of glass. The inner walls (7, 8) consist of soft ceramic material which is hermetically fused with the glass. <IMAGE>

Description

Die Erfindung betrifft eine Blitzlampe mit einem Gehäuse, in dem zwei Elektroden eingeschmolzen sind, die in einen Entla­dungsraum ragen.The invention relates to a flash lamp with a housing in which two electrodes are melted, which protrude into a discharge space.

Zur Erzielung hoher Leuchtdichten kann die Blitzlampe zu einem Ring gebogen werden. Ideal ist dabei ein möglichst enger, mög­lichst geschlossener Ring, sowohl vom Standpunkt der Symmetrie her als auch von den Abbildungseigenschaften im zugeordneten Reflektor.The flash lamp can be bent into a ring to achieve high luminance levels. A ring that is as narrow as possible and as closed as possible is ideal, both from the point of view of symmetry and from the imaging properties in the assigned reflector.

Der Biegeradius eines Glasrohres kann zwar relativ klein ge­macht werden, der im Rohr laufende Entladungslichtbogen bean­sprucht die Rohrwand jedoch am stärksten auf der Kurveninnen­seite. Die Beanspruchung wächst dabei mit der Verkleinerung des Biegeradius und kann zur Glasverdampfung führen.The bending radius of a glass tube can be made relatively small, but the discharge arc running in the tube places the greatest stress on the tube wall on the inside of the curve. The stress increases with the reduction of the bending radius and can lead to glass evaporation.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, eine Blitz­lampe der eingangs genannten Art so auszubilden, daß bei mög­lichst engem, stark gekrümmtem Entladungsraum eine Überbean­spruchung an den stark gekrümmten Stellen vermieden ist.The invention is accordingly based on the object of designing a flash lamp of the type mentioned at the outset in such a way that, when the discharge space is as narrow and strongly curved as possible, overuse at the strongly curved points is avoided.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß der Ent­ladungsraum zwischen den beiden Elektroden ringförmig verläuft und daß die Außenwände aus Glas und die Innenwände aus weißem Keramikmaterial bestehen, welches mit dem Glas hermetisch ver­schmolzen ist. Keramikmaterial widersteht dem heißen Lichtbogen wesentlich besser als Glas, so daß der Entladungsraum sehr stark gekrümmt werden kann.This object is achieved in that the discharge space between the two electrodes is annular and that the outer walls are made of glass and the inner walls are made of white ceramic material which is hermetically fused to the glass. Ceramic material withstands the hot arc much better than glass, so that the discharge space can be bent very much.

Die Erfindung ist nachfolgend anhand von in der Zeichnung dar­gestellten Ausführungsbeispielen näher erläutert. Es zeigen:

  • Fig. 1 ein erstes Ausführungsbeispiel einer Blitzlampe nach der Erfindung,
  • Fig. 2 einen Schnitt nach der Linie II-II in Figur 1,
  • Fig. 3 und 4 zwei weitere Ausführungsbeispiele einer Blitzlampe nach der Erfindung,
  • Fig. 5 ein drittes Ausführungsbeispiel einer Blitzlampe nach der Erfindung, und
  • Fig. 6 einen Schnitt nach der Linie VI-VI in Fig. 5.
The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing. Show it:
  • 1 shows a first embodiment of a flash lamp according to the invention,
  • 2 shows a section along the line II-II in FIG. 1,
  • 3 and 4 two further embodiments of a flash lamp according to the invention,
  • Fig. 5 shows a third embodiment of a flash lamp according to the invention, and
  • 6 shows a section along the line VI-VI in FIG. 5th

In der Fig. 1 ist eine Blitzlampe mit einem eine Außenwand 1 aufweisenden Gehäuse dargestellt, das von einem Oberteil 2 und einem Unterteil 3 abgeschlossen ist. In dem den Boden bildenden Unterteil 3 ist eine Elektrode 4 zentrisch und eine zweite Elektrode 5 exzentrisch eingeschmolzen. Zwischen den Elektroden 4, 5 ist eine die Elektrode 4 umschließende, eine Öffnung 6 freilassende Keramiktrennwand 7 vorgesehen, welche mit einem Ansatz 8 mit der Außenwand 1 verschmolzen ist. Die Elektrode 5 liegt dabei zwischen der Außenwand 1 und der Keramiktrennwand 4. Die Keramiktrennwand 4 besteht aus weißem Keramikmaterial, das die im ringförmigen Entladungsraum 9 entstehende Licht­strahlung gut nach außen reflektiert. Sie ist mit den Glastei­len hermetisch verschmolzen und zwingt die Entladung, einen ringförmigen Umweg zu machen und durch die Öffnung 6 zur die Kathode bildenden Elektrode 5 zu gelangen.1 shows a flash lamp with a housing having an outer wall 1, which is closed by an upper part 2 and a lower part 3. In the bottom part 3 forming the bottom, an electrode 4 is melted in the center and a second electrode 5 is eccentrically melted. Provided between the electrodes 4, 5 is a ceramic partition 7, which surrounds the electrode 4 and leaves an opening 6, and which is fused to the outer wall 1 with an extension 8. The electrode 5 lies between the outer wall 1 and the ceramic partition 4. The ceramic partition 4 consists of white ceramic material, which reflects the light radiation arising in the annular discharge space 9 well to the outside. It is hermetically fused to the glass parts and forces the discharge to make an annular detour and to pass through the opening 6 to the electrode 5 forming the cathode.

Das Ausführungsbeispiel gemäß Fig. 3 weist wieder eine Außen­wand 1 auf, die wie die Komponenten 1, 2, 3 beim Beispiel gemäß den Fig. 1 und 2 aus Glas besteht. Die einen Hohlzylinder bil­dende Außenwand 1 ist wie bei dem Beispiel gemäß den Fig. 1 und 2 oben und unten abgedeckt. In dem Boden sind zwei Elektroden 10, 11 exzentrisch eingeschmolzen, die von Ansätzen 12a einer etwa T-förmigen Keramiktrennwand 12 aus weißem Keramikmaterial teilweise umschlossen werden. Der mittlere Ansatz 13 der Kera­ miktrennwand 12 ist zu der Außenwand 1 geführt und mit dieser hermetisch verschmolzen. Dadurch wird der Lichtbogen auch bei diesem Beispiel gezwungen, einen ringförmigen Verlauf von der die Anode bildenden Elektrode 11 zu der die Kathode bildenden Elektrode 10 im ringförmigen Entladungsraum 14 zu nehmen. Zwei Öffnungen 15 erlauben dabei den Durchtritt der Entladung.3 again has an outer wall 1 which, like components 1, 2, 3 in the example according to FIGS. 1 and 2, is made of glass. The outer wall 1 forming a hollow cylinder is covered above and below, as in the example according to FIGS. 1 and 2. In the bottom, two electrodes 10, 11 are melted eccentrically, which are partially enclosed by shoulders 12a of an approximately T-shaped ceramic partition 12 made of white ceramic material. The middle approach 13 of the Kera Miktrennwand 12 is guided to the outer wall 1 and hermetically fused with this. As a result, the arc is also forced in this example to take an annular course from the electrode 11 forming the anode to the electrode 10 forming the cathode in the annular discharge space 14. Two openings 15 allow the discharge to pass through.

Das Ausführungsbeispiel gemäß Fig. 4 unterscheidet sich vom Ausführungsbeispiel gemäß Figur 3 dadurch, daß von den Elektro­den 16, 17 Leiterstücke 18, 19 in den ringförmigen Entladungs­raum 20 führen, wobei der Raum unmittelbar neben den Elektroden 16, 17 von einer weißen Keramiktrennwand 21 abgeschlossen ist, welche mit zwei Schenkeln 22 an den Leiterstücken 18, 19 an­liegt und mit einem mittleren Ansatz 20 wieder mit der Außen­wand 1 verschmolzen ist.The embodiment according to FIG. 4 differs from the embodiment according to FIG. 3 in that conductor pieces 18, 19 lead from the electrodes 16, 17 into the annular discharge space 20, the space immediately adjacent to the electrodes 16, 17 being closed off by a white ceramic partition wall 21 , which rests on the conductor pieces 18, 19 with two legs 22 and is fused to the outer wall 1 again with a middle shoulder 20.

Bei dem Ausführungsbeispiel gemäß den Fig. 5 und 6 ist wieder eine hohlzylindrische Außenwand 1 aus Glas vorgesehen, die von einem ebenfalls aus Glas bestehenden Oberteil 23 und einem aus Glas bestehenden Unterteil 24 hermetisch abgeschlossen ist. Im Oberteil 23 ist eine die Anode bildende Elektrode 25 und im Un­terteil 24 eine die Kathode bildende Elektrode 26 zentrisch eingeschmolzen. Die Elektroden sind von einem im Längsschnitt gemäß Fig. 5 H-förmigen Keramiktrennteil 27 aus weißem Keramik­material umgeben, das mit dem Oberteil 23 und dem Unterteil 24 hermetisch verschmolzen ist und Öffnungen für die Bildung des ringförmigen Entladungsraums 28 als Plasmakanal aufweist. In der Fig. 4 ist eine dieser Öffnungen sichtbar und mit 29 be­zeichnet. Eine entsprechende Öffnung befindet sich im Bereich der Elektrode 26.In the embodiment according to FIGS. 5 and 6, a hollow cylindrical outer wall 1 made of glass is again provided, which is hermetically sealed by an upper part 23, which is also made of glass, and a lower part 24, which is made of glass. In the upper part 23, an electrode 25 forming the anode and in the lower part 24, an electrode 26 forming the cathode are melted centrally. 5, the H-shaped ceramic separating part 27 made of white ceramic material, which is hermetically fused to the upper part 23 and the lower part 24 and has openings for the formation of the annular discharge space 28 as a plasma channel. 4 one of these openings is visible and designated 29. A corresponding opening is located in the area of the electrode 26.

Die Blitzlampe gemäß den Figuren 5 und 6 ist besonders kompakt, da der Innenraum des Kerns durch die Elektroden 25, 26 genutzt wird.The flash lamp according to FIGS. 5 and 6 is particularly compact since the interior of the core is used by the electrodes 25, 26.

Claims (6)

1. Blitzlampe mit einem Gehäuse (1, 2, 3, 23, 24), in dem zwei Elektroden (4, 5, 10, 11, 16, 17, 25, 26) eingeschmolzen sind,
die in einen Entladungsraum (9, 14, 20, 28) ragen, da­durch gekennzeichnet, daß der Entladungs­raum (9, 14, 20, 28) zwischen den beiden Elektroden (4, 5, 10, 11, 16, 17, 25, 26) ringförmig verläuft, und daß die Außenwände (1, 2, 3, 23, 24) aus Glas und die Innenwände (7, 8, 12, 12a, 13, 20, 22, 27) aus weißem Keramikmaterial bestehen, welches mit dem Glas hermetisch verschmolzen ist.1. flash lamp with a housing (1, 2, 3, 23, 24) in which two electrodes (4, 5, 10, 11, 16, 17, 25, 26) are melted,
which protrude into a discharge space (9, 14, 20, 28), characterized in that the discharge space (9, 14, 20, 28) between the two electrodes (4, 5, 10, 11, 16, 17, 25, 26 ) runs in a ring, and that the outer walls (1, 2, 3, 23, 24) made of glass and the inner walls (7, 8, 12, 12a, 13, 20, 22, 27) consist of white ceramic material, which with the glass is hermetically fused. 2. Blitzlampe nach Anspruch 1, dadurch gekenn­zeichnet, daß die Lampe als oben und unten geschlos­sener Hohlzylinder ausgebildet ist, in dessen Unterteil (3) ei­ne Elektrode (4) zentrisch und die zweite Elektrode (5) exzen­trisch eingeschmolzen ist, und daß zwischen den Elektroden (4, 5) eine die zentrische Elektrode (4) umschließende, eine Öff­nung (6) freilassende Keramiktrennwand (7) liegt, welche mit einem Ansatz (8) mit der Außenwand (1) verschmolzen ist, wobei die zweite Elektrode (5) zwischen Außenwand (1) und Keramik­trennwand (7) liegt.2. Flash lamp according to claim 1, characterized in that the lamp is designed as a closed top and bottom hollow cylinder, in the lower part (3) an electrode (4) is melted centrally and the second electrode (5) eccentrically, and that between the electrodes (4, 5) is a ceramic partition (7) which surrounds the central electrode (4) and leaves an opening (6), which is fused to the outer wall (1) with an extension (8), the second electrode (5) between Outer wall (1) and ceramic partition (7). 3. Blitzlampe nach Anspruch 1, dadurch gekenn­zeichnet, daß die Lampe als oben und unten geschlos­sener Hohlzylinder ausgebildet ist, in dessen Boden beide Elek­troden (10, 11, 16, 17) exzentrisch eingeschmolzen sind, und daß eine die beiden Elektroden (10, 11, 16, 17) umschließende, etwa T-förmige Keramiktrennwand (12, 12a, 21, 22) vorhanden ist, die mit ihrem mittleren Ansatz (13, 20) mit der Außenwand (1) verschmolzen ist.3. flash lamp according to claim 1, characterized in that the lamp is designed as a closed top and bottom hollow cylinder, in the bottom of which both electrodes (10, 11, 16, 17) are eccentrically melted, and that one of the two electrodes (10, 11th , 16, 17) enclosing, approximately T-shaped ceramic partition (12, 12a, 21, 22) is present, which is fused to the outer wall (1) with its central shoulder (13, 20). 4. Blitzlampe nach Anspruch 3, dadurch gekenn­zeichnet, daß die beiden Schenkel (12a) der Keramik­trennwand (12) Öffnungen (15) zum Durchtritt der Entladung in den Entladungsraum (14) frei lassen.4. Flash lamp according to claim 3, characterized in that the two legs (12a) of the ceramic partition (12) leave openings (15) for the passage of the discharge into the discharge space (14). 5. Blitzlampe nach Anspruch 3, dadurch gekenn­zeichnet, daß die beiden Elektroden (16, 17) von den Schenkeln (22) der Keramiktrennwand (21) vollständig umschlos­sen sind, wobei Leiterstücke (18, 19) in den ringförmigen Ent­ladungsraum (20) ragen.5. flash lamp according to claim 3, characterized in that the two electrodes (16, 17) of the legs (22) of the ceramic partition (21) are completely enclosed, conductor pieces (18, 19) projecting into the annular discharge space (20). 6. Blitzlampe nach Anspruch 1, dadurch gekenn­zeichnet, daß die Lampe als oben und unten geschlos­sener Hohlzylinder ausgebildet ist, in dessen Oberteil (23) und Unterteil (24) je eine Elektrode (25, 26) zentrisch einge­schmolzen ist, und daß die Elektroden (25, 26) von einem im Längsschnitt H-förmigen Keramiktrennteil (27) umgeben sind, das Öffnungen (29) für die Bildung des Plasmakanals (28) aufweist.6. Flash lamp according to claim 1, characterized in that the lamp is designed as a hollow cylinder closed at the top and bottom, in the upper part (23) and lower part (24) of which one electrode (25, 26) is melted centrally, and that the electrodes ( 25, 26) are surrounded by a longitudinally H-shaped ceramic separating part (27) which has openings (29) for the formation of the plasma channel (28).
EP88101036A 1987-02-06 1988-01-25 Flash lamp Ceased EP0278302A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3703690 1987-02-06
DE3703690 1987-02-06

Publications (1)

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EP0278302A1 true EP0278302A1 (en) 1988-08-17

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Application Number Title Priority Date Filing Date
EP88101036A Ceased EP0278302A1 (en) 1987-02-06 1988-01-25 Flash lamp

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US (1) US4896072A (en)
EP (1) EP0278302A1 (en)
JP (1) JPS63129955U (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255431A (en) * 1939-10-21 1941-09-09 Westinghouse Electric & Mfg Co Molded fluorescent lamp
US2465123A (en) * 1946-08-09 1949-03-22 Gen Electric Molded discharge lamp
US3671796A (en) * 1971-01-27 1972-06-20 Us Navy Plasma arc flash source

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254431A (en) * 1940-05-22 1941-09-02 Levine Samuel Marcus Medicine cabinet
US3651366A (en) * 1969-05-28 1972-03-21 Giannini Inst Flash tube apparatus
JPS5776745A (en) * 1980-10-30 1982-05-13 Matsushita Electric Works Ltd Discharge lamp unit
JPS57118359A (en) * 1981-01-14 1982-07-23 Mitsubishi Electric Corp Planar fluorescent lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255431A (en) * 1939-10-21 1941-09-09 Westinghouse Electric & Mfg Co Molded fluorescent lamp
US2465123A (en) * 1946-08-09 1949-03-22 Gen Electric Molded discharge lamp
US3671796A (en) * 1971-01-27 1972-06-20 Us Navy Plasma arc flash source

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 215 (E-138)[1093], 28. Oktober 1982; & JP-A-57 118 359 (MITSUBISHI DENKI K.K.) 23-07-1982 *

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JPS63129955U (en) 1988-08-25
US4896072A (en) 1990-01-23

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