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EP0193086B1 - Lampe à décharge à haute pression compacte - Google Patents

Lampe à décharge à haute pression compacte Download PDF

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Publication number
EP0193086B1
EP0193086B1 EP86102111A EP86102111A EP0193086B1 EP 0193086 B1 EP0193086 B1 EP 0193086B1 EP 86102111 A EP86102111 A EP 86102111A EP 86102111 A EP86102111 A EP 86102111A EP 0193086 B1 EP0193086 B1 EP 0193086B1
Authority
EP
European Patent Office
Prior art keywords
lamp
discharge vessel
halogen
high pressure
pressure discharge
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 - Lifetime
Application number
EP86102111A
Other languages
German (de)
English (en)
Other versions
EP0193086A3 (en
EP0193086A2 (fr
Inventor
Werner Dr. Block
Wolfgang Dr. Pabst
Manfred Pilsak
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to AT86102111T priority Critical patent/ATE52389T1/de
Publication of EP0193086A2 publication Critical patent/EP0193086A2/fr
Publication of EP0193086A3 publication Critical patent/EP0193086A3/de
Application granted granted Critical
Publication of EP0193086B1 publication Critical patent/EP0193086B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Definitions

  • the invention relates to a high-pressure discharge lamp with compact dimensions and a wall load greater than 100 W / cm 2 , in particular for optical systems, consisting of a discharge vessel made of high-temperature-resistant, translucent material as a single bulb, two high-temperature-resistant electrodes and a filling of mercury, at least one noble gas, metal halides and Halogen in excess, iodine and / or bromine being present as halogen.
  • a DC arc lamp with a bulb which contains an ionizable filling of an inert gas such as argon and halogen or metal halide, such as indium iodide.
  • the discharge lamp has a high average luminance.
  • the lamp life is less than 100 hours and the color stability of the emitted radiation is not sufficient for projection purposes.
  • Another disadvantage is their large decrease in luminance, which is caused by heavy erosion of the cathode tip due to the DC operation.
  • DE-PS 19 40 539 and DE-PS 21 14804 describe mercury vapor high-pressure discharge lamps which contain filler additives of rare earth halides, in particular dysprosium and / or holmium and / or thulium.
  • the lamps have a luminous efficacy of 90 Im / W or greater, the radiation having a color temperature of 6000 K and a color rendering index Ra of 92.
  • These lamps are unsuitable for projection purposes and other optical systems where high luminance is important because they do not have sufficiently compact dimensions with a short arc.
  • the core of the discharge arc which is used only in the projection for illumination, emits radiation in these lamps whose color rendering index is far below 92 and whose color temperature significantly exceeds 6000 K.
  • the aim of the invention is therefore to provide a compact high-pressure discharge lamp for AC operation which generates radiation with a high average luminance and a very good color rendering index and at the same time has a large average lifespan.
  • the high-pressure discharge lamp with the features mentioned in the preamble of the main claim is characterized in that, in order to achieve an average luminance of greater than 30 ksb at a specific arc power between 400 and 5000 W / cm over an average lamp life of 250 hours with a color rendering index Ra of at least 85 contains the discharge vessel as metal for the halide compounds cadmium and lithium.
  • An average lamp life is to be understood here as a time period during which the luminous efficacy of the lamp decreases by at most 15% without an optical system. This ensures that the decrease in light yield in a corresponding optical system after this period is between 20 and at most 45%.
  • the metals cadmium and lithium give the lamp a discharge arc with high color quality, with the entire arc including the hem producing radiation with "very good” color rendering (Ra at least 85). This ensures that the radiation from the arc core used for projection purposes enables "good” color rendering with a color rendering index Ra between 70 and 80.
  • the element lithium essentially serves to fill up the spectrum in the long-wave, i.e. in the red wavelength range of visible radiation.
  • the discharge vessel can contain holmium as metal for the halide compounds. Due to the multi-line radiation of the holmium, a further slight improvement in the color rendering properties of the radiation is achieved. This also enables the lamp to be used in film recording lighting.
  • the discharge vessel contains between 0.1 and 5.0 mg cadmium, up to 0.05 mg lithium and between 0.05 and 1.0 mg holmium per cm 3 of its volume.
  • the color temperature of the lamp can be varied and controlled in the red wavelength range depending on the intended use.
  • the discharge vessel preferably contains bromine and iodine in a molar ratio between 0.5 and 2.
  • the discharge vessel per cm 3 of its volume has a stoichiometric ratio of the compounds of halogens and metals in the lamp Halogen excess of up to 35 ⁇ mol.
  • a non-functioning circuit causes an increased blackening of the discharge vessel and a strong removal of tungsten on the electrodes and thus reduces the average lamp life. If the vapor pressure is not optimal, the luminance of the lamp is too low. Best results in terms of service life and luminance are achieved with a molar ratio of 1: 1 for bromine and iodine.
  • the lamp contains only argon as the base gas, which is present in the cold lamp at a pressure between 10 4 and 10 5 Pa. This ensures safe handling of the high-pressure discharge lamp when it is cold. On the other hand, the pressure is so high that when the Lamp vaporization of the tungsten electrodes and thus blackening of the discharge vessel is largely prevented.
  • the discharge vessel can also contain cesium to stabilize the arc.
  • the compact high-pressure discharge lamp is advantageously used in projection systems with a reflector firmly connected to the lamp.
  • FIG. 1 shows a 400 W high-pressure discharge lamp 1 of approximately 5.6 cm in length, as is used in a reflector system, not shown here.
  • the discharge vessel 2 made of quartz glass with a wall thickness of 0.22 cm has a volume of 0.76 cm 3 .
  • the rod-shaped electrodes 3, 4 are held at a distance of 0.42 cm in the electrode shafts 5, 6 of the discharge vessel 2, which have a length of approximately 2 cm and an approximately circular outer diameter of approximately 0.8 cm.
  • the electrodes 3, 4 are connected to the power supply lines 9, 10 via molybdenum foils 7, 8, which are melted vacuum-tight into the electrode shafts 5, 6.
  • the discharge vessel 2 contains a filling of 0.15 mg Ho, 0.18 mg CsBr, 0.10 mg CsJ, 0.10 mg LiBr, 0.07 mg LiJ, 1.80 mg CdJ 2 , 2.00 mg HgBr 2 , 0.60 mg HgJ 2 and 13.1 mg metallic Hg and Ar with a base gas pressure of 66.6 kPa.
  • the high-pressure discharge lamp 1 With a lamp current of 7.3 A and a lamp voltage of 55 V, the high-pressure discharge lamp 1 has an initial useful luminous flux of 30 klm with a color temperature of approximately 4500 K.
  • this lamp can achieve up to 3600 screens, whereby the uniformity of the screen illumination E mlr / E mlnel according to DIN 15748 at 0.65 and lies above.
  • FIG. 2 shows the spectral radiance of a 400 W high-pressure discharge lamp, as shown in FIG. 1, as a function of the wavelength in the range between 250 and 1000 nm. 100% correspond to 0.69 W per sr and 10 nm.
  • FIG. 3 shows a high-pressure discharge lamp 14 permanently installed in a reflector 13 with a power consumption of 270 W.
  • the lamp 14 lies with its axis in the axis of the reflector 13. While one electron shaft 15 is fastened in the ceramic base 17 by means of cement 16, the other Electrode shaft 18 is held on the ceramic end ring 20 of the reflector 13 by copper strips 19, which also serve as power supply.
  • the high-pressure discharge lamp 14 has a length of approximately 4.8 cm and a discharge vessel volume of 0.28 cm 3 .
  • the electrodes 21, 22 are connected to the power supply lines 25, 26 at a distance of 0.25 cm via molybdenum foils 23, 24 which have been sealed in a vacuum-tight manner.
  • One power connection 27 is attached to the base 17, the other (not visible here) to the end ring 20 of the reflector 13.
  • the filling of the discharge vessel 28 is composed of 0.05 mg Ho, 0.13 mg CsBr, 0.07 mg CsJ, 0.04 mg LiBr, 0.03 mg LiJ, 1.10 mg CdJ 2 , 1.18 mg HgBr 2 , 0.25 mg HgJ 2 and 7.5 mg metallic Hg and Ar with a base gas pressure of 66.6 kPa together.
  • the high-pressure discharge lamp 14 has an initial useful luminous flux of 18 klm with a color temperature of 4500 to 5000 K.
  • the high useful luminous flux in these high-pressure discharge lamps can be obtained in particular with rectangular operation at approx. 300 Hz. Such an operation also ensures that flickering effects do not occur in the case of recording or projection systems which operate with a rotating aperture.

Landscapes

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

Claims (7)

1. Lampe à décharge à haute pression (1, 14) possédant des dimensions réduites et fournissant une contrainte de paroi supérieure à 100 W/cm2, notamment pour des systèmes optiques, constitué par une enceinte à décharge (2,28) réalisée en un matériau transparent résistant aux températures élevées sous la forme d'une ampoule unique, par deux électrodes (3, 4; 21, 22) résistantes aux températures élevées ainsi que par un remplissage formé par du mercure, au moins dans un gaz rare, un halogénure métallique et un halogène en excès,.l'halogène étant de l'iode etou du brome, caractérisée en ce que pour l'obtention d'une densité lumineuse moyenne supérieure à 30 ksb pour une puissance d'arc spécifique comprise entre 400 et 5000 W/cm pendant une durée de vie moyenne de la lampe de 250 heures avec un indice Ra de restitution des couleurs égal à au moins 85, l'enceinte à décharge (2, 28) contient du cadmium et du lithium comme métal pour les composés d'halogénures.
. 2. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que l'enceinte à décharge (2, 28) contient en outre, du holmium comme métal pour les composés d'halogénures.
3. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que l'enceinte à décharge (2, 28) contient, pour chaque cm3 de son volume, entre 0,1 et 5,0 mg de cadmium et jusqu'à 0,05 mg de lithium.
4. Lampe à décharge à haute pression suivant la revendication 2, caractérisée par le fait que l'enceinte à décharge (2, 28) contient, pour chaque cm3 de son volume, entre 0,05 et 1,0 mg de holmium.
5. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que les halogènes brome et iode sont présents dans un rapport molaire compris entre 0,5 et 2 dans l'enceinte à décharge (2, 28).
6. Lampe à décharge à haute pression suivant les revendications 1 et 5, caractérisée par le fait que l'enceinte à décharge (2, 28) contient, pour chaque cm3 de son volume, un excès d'halogène atteignant jusqu'à 35 p.moles, qui correspond à une valeur supérieure au rapport stoéchiométri- que des composés d'halogènes et de métaux.
7. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la lampe (1, 14) contient comme gaz de base, uniquement de l'argon, qui est présent à une pression comprise entre 104 et 105 Pa dans la lampe froide (1, 14).
EP86102111A 1985-02-22 1986-02-19 Lampe à décharge à haute pression compacte Expired - Lifetime EP0193086B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86102111T ATE52389T1 (de) 1985-02-22 1986-02-19 Kompakte hochdruckentladungslampe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3506295 1985-02-22
DE19853506295 DE3506295A1 (de) 1985-02-22 1985-02-22 Kompakte hochdruckentladungslampe

Publications (3)

Publication Number Publication Date
EP0193086A2 EP0193086A2 (fr) 1986-09-03
EP0193086A3 EP0193086A3 (en) 1988-11-02
EP0193086B1 true EP0193086B1 (fr) 1990-05-02

Family

ID=6263329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102111A Expired - Lifetime EP0193086B1 (fr) 1985-02-22 1986-02-19 Lampe à décharge à haute pression compacte

Country Status (5)

Country Link
US (1) US4686419A (fr)
EP (1) EP0193086B1 (fr)
JP (1) JPS61193354A (fr)
AT (1) ATE52389T1 (fr)
DE (2) DE3506295A1 (fr)

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NL191812C (nl) * 1987-09-04 1996-08-02 Philips Electronics Nv Hogedrukgasontladingslamp en armatuur voorzien van die lamp.
US4935668A (en) * 1988-02-18 1990-06-19 General Electric Company Metal halide lamp having vacuum shroud for improved performance
CA1301238C (fr) * 1988-02-18 1992-05-19 Rolf Sverre Bergman Lampe au xenon et aux halogenures pour vehicules automobiles
JPH02256151A (ja) * 1989-03-29 1990-10-16 Ushio Inc 照明用ランプ
DE3910878A1 (de) * 1989-04-04 1990-10-11 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Zweiseitig gesockelte hochdruckentladungslampe
JPH0531801Y2 (fr) * 1990-01-29 1993-08-16
US5144201A (en) * 1990-02-23 1992-09-01 Welch Allyn, Inc. Low watt metal halide lamp
DE59105899D1 (de) * 1990-04-12 1995-08-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe und Verfahren zu ihrer Herstellung.
DE4124055A1 (de) * 1991-07-19 1993-01-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
US5497049A (en) * 1992-06-23 1996-03-05 U.S. Philips Corporation High pressure mercury discharge lamp
US5479065A (en) * 1992-12-28 1995-12-26 Toshiba Lighting & Technology Corporation Metal halide discharge lamp suitable for an optical light source having a bromine to halogen ratio of 60-90%, a wall load substantially greater than 40 W/cm2, and a D.C. potential between the anode and cathode
DE4310539A1 (de) * 1993-03-31 1994-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Hochdruckentladungslampe für den Einbau in optische Systeme
DE4322115A1 (de) * 1993-07-02 1995-01-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Hochruckentladungslampe
DE69401394T2 (de) * 1993-07-13 1997-04-24 Matsushita Electric Ind Co Ltd Metall-Halogen Entladungslampe, optischer Beleuchtungsapparat und Bildvorführungssystem
US5451838A (en) * 1994-03-03 1995-09-19 Hamamatsu Photonics K.K. Metal halide lamp
US5621267A (en) * 1995-03-22 1997-04-15 Ilc Technology, Inc. High-power metal halide reflector lamp
US5879159A (en) * 1996-12-24 1999-03-09 Ion Laser Technology, Inc. Portable high power arc lamp system and applications therefor
DE19714009A1 (de) * 1997-04-04 1998-10-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Gleichstrombogenlampe
DE19714008A1 (de) * 1997-04-04 1998-10-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Gleichstrombogenlampe
JP3200575B2 (ja) * 1997-09-01 2001-08-20 フェニックス電機株式会社 メタルハライドランプ
JP3307291B2 (ja) * 1997-09-04 2002-07-24 松下電器産業株式会社 高圧水銀放電ランプ
JPH1196969A (ja) * 1997-09-19 1999-04-09 Phoenix Denki Kk 直流点灯放電灯と該放電灯をリフレクタに装着した光源
JP2948200B1 (ja) * 1998-04-08 1999-09-13 ウシオ電機株式会社 高圧水銀ランプ
DE10028089B4 (de) * 1999-06-10 2010-12-09 Toshiba Lighting & Technology Corp. Beleuchtungseinrichtung mit einer Hochleistungs-Entladungslampe
US6566817B2 (en) * 2001-09-24 2003-05-20 Osram Sylvania Inc. High intensity discharge lamp with only one electrode
JP4320379B2 (ja) * 2003-12-22 2009-08-26 ハリソン東芝ライティング株式会社 メタルハライドランプおよびメタルハライドランプ点灯装置
JP5364404B2 (ja) * 2009-03-17 2013-12-11 株式会社オーク製作所 ショートアーク型放電ランプ
JP7152096B2 (ja) * 2021-11-04 2022-10-12 株式会社トライフォース・マネジメント トルクセンサ

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BE754499A (fr) * 1969-08-08 1971-01-18 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lampe a decharge sous haute pression, a vapeur de mercure avec additif d'halogenure metallique
NL7011321A (fr) * 1970-07-31 1972-02-02
DE2114804B2 (de) * 1971-03-26 1978-09-14 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen Quecksilberdampf-Hochdruckentladungslampe mit Zusatz von Halogeniden der Seltenen Erden
DE2422411A1 (de) * 1974-05-09 1975-12-11 Philips Patentverwaltung Hochdruckquecksilberdampfentladungslampe
DE2725297C3 (de) * 1977-06-04 1980-10-16 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochdruckquecksilberdampfentladungslampe
US4138621A (en) * 1977-06-27 1979-02-06 General Electric Company Short-arc discharge lamp with starting device
DE2840031A1 (de) * 1978-09-14 1980-04-03 Patra Patent Treuhand Anordnung mit hochdruckentladungslampe und reflektor als baueinheit

Also Published As

Publication number Publication date
EP0193086A3 (en) 1988-11-02
US4686419A (en) 1987-08-11
EP0193086A2 (fr) 1986-09-03
ATE52389T1 (de) 1990-05-15
DE3506295A1 (de) 1986-08-28
JPH0565976B2 (fr) 1993-09-20
DE3670925D1 (de) 1990-06-07
JPS61193354A (ja) 1986-08-27

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