EP0067758B1 - Flash lamp with radial electric connections and gaseous supply - Google Patents
Flash lamp with radial electric connections and gaseous supply Download PDFInfo
- Publication number
- EP0067758B1 EP0067758B1 EP82401004A EP82401004A EP0067758B1 EP 0067758 B1 EP0067758 B1 EP 0067758B1 EP 82401004 A EP82401004 A EP 82401004A EP 82401004 A EP82401004 A EP 82401004A EP 0067758 B1 EP0067758 B1 EP 0067758B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- brought
- metal
- discharge tube
- bushing
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp
Definitions
- the present invention relates to a flash tube with radial electrical connections with gas supply. It finds an application in particular in the optical pumping of lasers (and in particular iodine lasers), in the visible or near ultraviolet range.
- the electrodes are connected to metal rods serving as electrical connections. These rods are arranged in the axis of the discharge tube and connected to the latter by glass-metal seals.
- a significant “dead length” that is to say a portion which does not contribute to the emission of light.
- the gaseous medium in which the discharge takes place cannot be renewed, and there is a gradual deterioration in its purity which limits the life of the tube to a few thousand flashes. .
- the nature and the pressure of the gaseous medium are definitively fixed.
- document FR-A-2 345 809 discloses a flash tube in which each electrode is connected to the discharge tube by seals.
- the present invention relates to a flash tube of this kind, provided with its supply line, in which original connection means are provided which facilitate mounting and reduce the dead length.
- the electrode intended to be brought to a high potential is fixed to a metal connection piece disposed in an insulating endpiece provided with an insulating sleeve disposed radially with respect to the discharge tube, this sleeve being pierced with a canal.
- the supply line is a coaxial cable having a central conductor which borrows the channel of the insulating sleeve and is connected to the connection part of the electrode intended to be brought to a high potential, and the electrode intended to be brought to earth potential is fixed in a metal tip provided with a metal sleeve disposed radially with respect to the discharge tube.
- the flash tube essentially comprises a discharge tube 10 made of transparent material (for example silica) closed by two electrodes 12 and 14. These electrodes are connected to the tube 10 by seals 16 and 18. These joints ensure, on the one hand, the tightness of the discharge tube and, on the other hand, a certain flexibility in the connection of the electrodes with the tube.
- One of the electrodes, the electrode 14, is intended to be brought to a high potential during the duration of excitation of the tube; the other, electrode 12, is brought to earth potential.
- the latter electrode is fixed in a metal end piece 20, for example by means of a screw 22, this end piece comprising a metal sleeve 24 disposed radially relative to the discharge tube and serving as an electrical connection.
- the electrode 14 and the piece 26 are integrated in an insulating tip 30 provided with an insulating plug 32.
- the end piece 30 is integral with a sleeve 34, also made of insulating material, and arranged radially with respect to the discharge tube. This sleeve 34 is pierced with a channel 36.
- the flash tube is electrically powered by a coaxial cable, the inner conductor 40 of which passes through the channel 36 to be welded to the connection piece 26.
- the outer conductor 42 of this cable is connected to a metal piece 44 which is fixed to the end of the insulating sleeve 34.
- This piece 44 is connected to the metal sleeve 24 specific to the electrode 12, by a metal bar 46 which extends parallel to the discharge tube 10.
- connection mode limits the inductance of the circuit and allows short discharges to be obtained.
- the bar 46 can serve as a support for a reflector 48, disposed around the flash tube and capable of concentrating the light emitted by the latter towards the member of use.
- the electrode 12 which is brought to earth potential, is moreover pierced with openings 50 of small diameter, connected to a channel 52 pierced in the metal sleeve 24.
- a connector 54 At the end of the latter is a connector 54 which can be connected to a gas source not shown.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Elimination Of Static Electricity (AREA)
- Lasers (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Description
La présente invention concerne un tube à éclairs à connexions électriques radiales avec alimentation en gaz. Elle trouve une application notamment dans le pompage optique des lasers (et en particulier des lasers à iode), dans le domaine du visible ou du proche ultraviolet.The present invention relates to a flash tube with radial electrical connections with gas supply. It finds an application in particular in the optical pumping of lasers (and in particular iodine lasers), in the visible or near ultraviolet range.
Dans les tubes à éclairs classiques, les électrodes sont reliées à des tiges métalliques servant de connexions électriques. Ces tiges sont disposées dans l'axe du tube à décharge et reliées à celui-ci par des scellements verre-métal. Il en résulte, d'une part, une assez grande difficulté technologique de réalisation et, d'autre part, une longueur « morte (c'est-à-dire une partie ne contribuant pas à l'émission de lumière) importante. Par ailleurs, comme ces tubes sont scellés, le milieu gazeux dans lequel s'effectue la décharge ne peut être renouvelé, et l'on assiste à une dégradation progressive de sa pureté qui limite la durée de vie du tube à quelques milliers d'éclairs. En outre, la nature et la pression du milieu gazeux sont fixés définitivement.In conventional flash tubes, the electrodes are connected to metal rods serving as electrical connections. These rods are arranged in the axis of the discharge tube and connected to the latter by glass-metal seals. This results, on the one hand, in a fairly great technological difficulty of production and, on the other hand, a significant “dead length” (that is to say a portion which does not contribute to the emission of light). Furthermore, as these tubes are sealed, the gaseous medium in which the discharge takes place cannot be renewed, and there is a gradual deterioration in its purity which limits the life of the tube to a few thousand flashes. . In addition, the nature and the pressure of the gaseous medium are definitively fixed.
Cependant, on connaît par le document FR-A-2 345 809 un tube à éclairs dans lequel chaque électrode est reliée au tube à décharge par des joints d'étanchéité.However, document FR-A-2 345 809 discloses a flash tube in which each electrode is connected to the discharge tube by seals.
La présente invention a pour objet un tube à éclairs de ce genre, muni de sa ligne d'alimentation, dans lequel des moyens de connexion originaux sont prévus qui facilitent le montage et réduisent la longueur morte.The present invention relates to a flash tube of this kind, provided with its supply line, in which original connection means are provided which facilitate mounting and reduce the dead length.
Selon l'invention, l'électrode destinée à être portée à un potentiel élevé est fixée à une pièce de connexion métallique disposée dans un embout isolant muni d'un manchon isolant disposé radialement par rapport au tube à décharge, ce manchon étant percé d'un canal. Selon une autre caractéristique, la ligne d'alimentation est un câble coaxial possédant un conducteur central qui emprunte le canal du manchon isolant et est relié à la pièce de connexion de l'électrode destinée à être portée à un potentiel élevé, et l'électrode destinée à être portée au potentiel de la terre est fixée dans un embout métallique muni d'un manchon métallique disposé radialement par rapport au tube à décharge.According to the invention, the electrode intended to be brought to a high potential is fixed to a metal connection piece disposed in an insulating endpiece provided with an insulating sleeve disposed radially with respect to the discharge tube, this sleeve being pierced with a canal. According to another characteristic, the supply line is a coaxial cable having a central conductor which borrows the channel of the insulating sleeve and is connected to the connection part of the electrode intended to be brought to a high potential, and the electrode intended to be brought to earth potential is fixed in a metal tip provided with a metal sleeve disposed radially with respect to the discharge tube.
Les caractéristiques de l'invention apparaîtront mieux après la description qui suit, d'un exemple de réalisation donné à titre illustratif et nullement limitatif. Cette description se réfère à une figure annexée qui représente, en coupe longitudinale, un tube à éclairs conforme à l'invention.The characteristics of the invention will appear better after the following description of an embodiment given by way of illustration and in no way limiting. This description refers to an appended figure which represents, in longitudinal section, a flash tube according to the invention.
Tel que représenté sur cette figure, le tube à éclairs comprend essentiellement un tube à décharge 10 en matériau transparent (par exemple en silice) fermé par deux électrodes 12 et 14. Ces électrodes sont reliées au tube 10 par des joints 16 et 18. Ces joints assurent, d'une part, l'étanchéité du tube à décharge et, d'autre part, une certaine souplesse dans la liaison des électrodes avec le tube. L'une des électrodes, l'électrode 14, est destinée à être portée à un potentiel élevé pendant la durée d'excitation du tube ; l'autre, l'électrode 12, est portée au potentiel de la terre. Cette dernière électrode est fixée dans un embout métallique 20, par exemple au moyen d'une vis 22, cet embout comprenant un manchon métallique 24 disposé radialement par rapport au tube à décharge et servant de connexion électrique. L'électrode 14, qui est destinée à être portée à un potentiel élevé, est solidaire d'une pièce métallique de raccordement électrique 26 au moyen d'une vis 28. L'électrode 14 et la pièce 26 sont intégrées dans un embout isolant 30 muni d'un bouchon isolant 32. L'embout 30 est solidaire d'un manchon 34, également en matière isolante, et disposé radialement par rapport au tube à décharge. Ce manchon 34 est percé d'un canal 36.As shown in this figure, the flash tube essentially comprises a
Le tube à éclairs est alimenté électriquement par un câble coaxial dont le conducteur intérieur 40 emprunte le canal 36 pour aller se souder sur la pièce de raccordement 26. Le conducteur extérieur 42 de ce câble est relié à une pièce métallique 44 qui est fixée à l'extrémité du manchon isolant 34. Cette pièce 44 est reliée au manchon métallique 24 propre à l'électrode 12, par une barre métallique 46 qui s'allonge parallèlement au tube à décharge 10.The flash tube is electrically powered by a coaxial cable, the inner conductor 40 of which passes through the
Ce mode de connexion limite l'inductance du circuit et permet d'obtenir des décharges brèves. En outre, la barre 46 peut servir de support à un réflecteur 48, disposé autour du tube éclair et apte à concentrer la lumière émise par celui-ci vers l'organe d'utilisation.This connection mode limits the inductance of the circuit and allows short discharges to be obtained. In addition, the
L'électrode 12, qui est portée au potentiel de la terre, est par ailleurs percée d'ouvertures 50 de petit diamètre, reliées à un canal 52 percé dans le manchon métallique 24. A l'extrémité de celui-ci se trouve un raccord 54 qui peut être relié à une source de gaz non représentée.The
Ces moyens permettent l'introduction de gaz dans le tube à décharge, l'évacuation du gaz pollué après un certain nombre d'éclairs, puis la réintroduction de gaz frais. Ils autorisent également un réglage de la pression de gaz en vue d'une optimisation des performances du tube à décharge.These means allow the introduction of gas into the discharge tube, the evacuation of the polluted gas after a certain number of flashes, then the reintroduction of fresh gas. They also allow adjustment of the gas pressure with a view to optimizing the performance of the discharge tube.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8111143 | 1981-06-05 | ||
FR8111143A FR2507385A1 (en) | 1981-06-05 | 1981-06-05 | FLASHING TUBE WITH RADIAL ELECTRICAL CONNECTIONS WITH GAS SUPPLY |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0067758A2 EP0067758A2 (en) | 1982-12-22 |
EP0067758A3 EP0067758A3 (en) | 1983-04-06 |
EP0067758B1 true EP0067758B1 (en) | 1986-10-01 |
Family
ID=9259223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82401004A Expired EP0067758B1 (en) | 1981-06-05 | 1982-06-02 | Flash lamp with radial electric connections and gaseous supply |
Country Status (6)
Country | Link |
---|---|
US (1) | US4496873A (en) |
EP (1) | EP0067758B1 (en) |
JP (1) | JPS57212761A (en) |
CA (1) | CA1192598A (en) |
DE (1) | DE3273534D1 (en) |
FR (1) | FR2507385A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5039904A (en) * | 1989-09-28 | 1991-08-13 | General Electric Company | Mount for miniature arc lamp |
US5245624A (en) * | 1991-11-14 | 1993-09-14 | Toepel Michael P | Lase and laser pump lamp chamber |
US5785543A (en) * | 1995-12-04 | 1998-07-28 | Litton Systems, Inc. | High voltage flashlamp connector method and apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2342806A (en) * | 1938-06-22 | 1944-02-29 | Hofmann Josef | High pressure mercury vapor lamp |
US3172000A (en) * | 1961-08-31 | 1965-03-02 | Giannini Scient Corp | Gas discharge light source with a recirculating gas supply |
US3555449A (en) * | 1966-11-15 | 1971-01-12 | Westinghouse Electric Corp | Liquid cooled laser system |
US3447030A (en) * | 1967-02-28 | 1969-05-27 | Electro Optical Systems Inc | Cold seal lamp pressure regulation |
US3721917A (en) * | 1971-06-17 | 1973-03-20 | V Fisher | Gas-discharge devices for optical pumping of lasers |
US4074208A (en) * | 1975-09-17 | 1978-02-14 | Jersey Nuclear-Avco Isotopes, Inc. | Stabilized repetitively pulsed flashlamps |
US3993922A (en) * | 1976-01-05 | 1976-11-23 | Gte Sylvania Incorporated | Arc discharge lamp with integral trigger electrode |
-
1981
- 1981-06-05 FR FR8111143A patent/FR2507385A1/en active Granted
-
1982
- 1982-06-02 EP EP82401004A patent/EP0067758B1/en not_active Expired
- 1982-06-02 DE DE8282401004T patent/DE3273534D1/en not_active Expired
- 1982-06-04 JP JP57096079A patent/JPS57212761A/en active Pending
- 1982-06-04 CA CA000404497A patent/CA1192598A/en not_active Expired
- 1982-06-04 US US06/385,254 patent/US4496873A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA1192598A (en) | 1985-08-27 |
EP0067758A2 (en) | 1982-12-22 |
FR2507385A1 (en) | 1982-12-10 |
FR2507385B1 (en) | 1984-11-02 |
EP0067758A3 (en) | 1983-04-06 |
US4496873A (en) | 1985-01-29 |
JPS57212761A (en) | 1982-12-27 |
DE3273534D1 (en) | 1986-11-06 |
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