EP0788655B1 - Lampe a decharge a halogenure metallique a usage photo-optique - Google Patents

Lampe a decharge a halogenure metallique a usage photo-optique Download PDF

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Publication number
EP0788655B1
EP0788655B1 EP95934051A EP95934051A EP0788655B1 EP 0788655 B1 EP0788655 B1 EP 0788655B1 EP 95934051 A EP95934051 A EP 95934051A EP 95934051 A EP95934051 A EP 95934051A EP 0788655 B1 EP0788655 B1 EP 0788655B1
Authority
EP
European Patent Office
Prior art keywords
metal halide
discharge lamp
lamp according
halide discharge
region
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
EP95934051A
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German (de)
English (en)
Other versions
EP0788655A1 (fr
Inventor
Joachim Dirks
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
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Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0788655A1 publication Critical patent/EP0788655A1/fr
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Publication of EP0788655B1 publication Critical patent/EP0788655B1/fr
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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
    • 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

Definitions

  • the invention relates to a metal halide discharge lamp according to the preamble of claim 1. It is based in particular on the German patent application P 43 27 534.6 and DE-GM 94 01 436.
  • Metal halide discharge lamps of this type are predominantly installed in optical reflectors or other optical imaging systems. Your area of application is, for example, projection or light guide technology for overhead, slide, cinema and video projection or endoscopy and boroscopy. Accordingly, very short arcs (a few millimeters) and maximum luminance (on average a few 10 kcd / cm 2 ) at color temperatures of more than 5000 K and good to very good color rendering (Ra> 85) are required. Typical power values are in the range between approx. 35 W and 600 W.
  • German patent application P 43 27 534.6 and DE-GM 94 01 436 there is one discloses such a lamp with a filling, in addition to mercury and an inert gas contains additional halogen compounds of the elements aluminum and indium.
  • the high ignition voltages required typically approx. 12 kV are disadvantageous.
  • the invention has for its object to eliminate the disadvantage mentioned and to create a metal halide discharge lamp that has a color temperature of more than 5000 K - with very good color rendering - and a relatively low ignition voltage has and realized this with as few filling components as possible.
  • the discharge vessel of the metal halide discharge lamp according to the invention additionally contains the element gallium (Ga) as a further metal for the formation of metal halides.
  • the filling amount per cm 3 of the container volume of the element Ga is typically up to 1 mg, in particular it is in the range between 0.02 mg and 1 mg, preferably between 0.03 mg and 0.2 mg.
  • the ignition voltage of the cold lamp decreases from typically 12 kV to below 8 kV.
  • the filling also contains the following additional components: at least one inert gas, for example argon (Ar) or xenon (Xe) as the ignition gas with a typical filling pressure in the range between approx. 10 kPa and 40 kPa, mercury for setting the desired burning voltage, typically in the range between 15 mg and 30 mg for burning voltages between 60 V and 90 V and one or more halogens, preferably iodine (I) and / or bromine (Br) to form metal halides.
  • at least one inert gas for example argon (Ar) or xenon (Xe) as the ignition gas with a typical filling pressure in the range between approx. 10 kPa and 40 kPa
  • mercury for setting the desired burning voltage, typically in the range between 15 mg and 30 mg for burning voltages between 60 V and 90 V
  • one or more halogens preferably iodine (I) and / or bromine (Br) to form metal halides.
  • DD-PS 254 270 discloses a short arc lamp, the complex filling of which essentially from the elements mercury (Hg), zinc (Zn), indium, sodium (Na), lithium (Li) and halogens. It is mentioned that In can be replaced completely or partially by Ga. This serves however, only to achieve good color rendering and a low color temperature (in the range between 2500 K and 4000 K). An influence of the Ga on the Ignition voltage, however, is not mentioned. In addition, this lamp is not suitable for the specified use in optical imaging systems because of the color temperature of the entire system is usually about 1000 K to 2000 K lower than that the lamp without optical system.
  • a gas discharge lamp that has high luminance at color temperatures in the range from 3000 K to 4600 K and color rendering indices over 90 is possible in DE-A 32 42 752.
  • the discharge vessel of the lamp contains argon as an inert gas as well as mercury, indium, sodium, lithium, aluminum, tin, iodine and thallium. Indium and tin can be wholly or partly equivalent to gallium or Aluminum to be replaced.
  • the lamp is particularly suitable for replacing Halogen light bulbs with color temperatures in the range of 3200 ⁇ 200 K. Due the low color temperature, however, is also not suitable for the beginning mentioned use, especially not for video projection.
  • the color temperature can be influenced by the proportions of the filling components Al, In and Ga.
  • color temperatures between 5000 K and 30000 K, in particular between 5000 K and 15000 K, preferably between 5000K and 11000 K, can be set. When operating the lamp with an optical reflector, this results in daylight-like or higher color temperatures.
  • Typical mass ratios for In to Al and Ga to Al are in the range between approx. 1.0 and 0.5 for low color temperatures and approx. 20 for high color temperatures.
  • the filling quantity per cm 3 of the discharge vessel volume of the element Al is typically in the range between 0.01 mg and 2 mg, preferably between 0.02 mg and 0.2 mg.
  • the filling amount of the In is typically in the range between 0.03 mg / cm 3 and 0.5 mg / cm 3 , preferably between 0.05 mg / cm 3 and 0.3 mg / cm 3 .
  • the filling amount of the Ga is typically in the range between 0.02 mg / cm 3 and 1 mg / cm 3 , preferably between 0.03 mg / cm 3 and 0.2 mg / cm 3 .
  • Quartz glass or a transparent ceramic material for example Al 2 O 3 is suitable as the material for the lamp bulb.
  • a discharge vessel which is closed on two sides and which is covered, for example, at one or both ends with a heat layer (for example ZrO 2 ) is particularly suitable for the lamp.
  • a heat layer for example ZrO 2
  • the homogeneity of the light and color distribution can be improved by matting at least a portion of the outer wall of the bulb.
  • two opposing electrodes are located inside the discharge vessel.
  • the electrodes are each connected to a power supply, which are led gas-tight to the outside.
  • the internal volume of the discharge vessel is less than approx. 3 cm 3 .
  • the electrode spacing is less than approximately 10 mm, preferably between 2 mm and 6 mm. Due to these compact dimensions, the lamp is well approximated to the ideal of a point light source and thus enables a high optical efficiency of the lamp-reflector system.
  • Typical power levels are between 150 W and 200 W.
  • the electrodes are located outside the discharge vessel, for example on the outer wall of the discharge vessel.
  • the advantage is that this prevents corrosion of the electrodes by the filling in any case.
  • highest power densities can be achieved in the discharge in this way.
  • the lamp is advantageously combined with a reflector to form a structural unit, as described in EP-A 459 786.
  • the lamp is mounted approximately axially in the reflector.
  • the reflector has a dichroic coating, for example.
  • a metal halide discharge lamp 1 with a power of 170 W and an ellipsoid-like discharge vessel 2 made of quartz glass, which is hermetically sealed at both ends with a pinch seal 3, is shown schematically.
  • the inner volume of the discharge vessel 2 is approximately 0.7 cm 3 .
  • the axially opposite electrodes 4 are 5 mm apart. They consist of an electrode shaft 5 made of tungsten, onto which a coil 6 made of tungsten is also pushed.
  • the shaft 5 is connected to external power supply lines 8 in the area of the pinch 3 via a film 7.
  • the lamp 1 is arranged approximately axially in a parabolic reflector 9, the arc that forms between the two electrodes 4 in operation in Focus of the paraboloid sits.
  • Part of the first pinch seal 3a is located directly in a central bore of the reflector 9 and is there in one with cement Socket 10 held.
  • the first power supply line 8a has a screw base contact 10a connected.
  • the second pinch seal 3b faces the reflector opening 11.
  • the second power supply line 8b is connected in the area of the opening 11 to a cable 12 which is electrically insulated through the wall of the reflector 9 and returned to a separate contact 10b.
  • the outer surfaces of the ends 13 of the discharge vessel 2 are coated with ZrO 2 for heat accumulation purposes.
  • the filling contains 18 mg Hg and 20 kPa Ar as the base gas. It also contains the discharge vessel 2 contains the metal halides listed in Table 1 below.
  • the ignition voltage could be reduced from approx. 12 kV to less than 8 kV.
  • the specific arc power and the operating voltage are approx. 34 W per mm arc length or approx. 70 V.
  • Table 2 shows the lighting values achieved.
  • Luminous efficacy 72 lm / W Color temperature 6800 K.
  • variant Al in mg Al in mg / cm 3 In / Al Ga / Al Ga / In T F in K Ra ⁇ in lm / W 1 0.15 0.21 1.3 0.67 0.52 5300 95 64 2nd 0.04 0.06 5.0 2.50 0.50 6800 94 72 3rd 0.02 0.03 10.0 5.00 0.50 7500 95 69
  • the color temperature T F can be influenced by a targeted choice of the proportions of the main components Al, In, Ga of the filling, in this case In / Al and Ga / Al.

Landscapes

  • Discharge Lamp (AREA)

Claims (15)

  1. Lampe à décharge à halogénure métallique à usage photo-optique, comprenant une enceinte de décharge et au moins deux électrodes, l'enceinte de décharge contenant, pour produire de la lumière ayant une température de couleur de plus de 5000 K, une atmosphère ionisable constituée de mercure, d'au moins un gaz rare, d'au moins un halogène d'aluminium (Al) et d'indium (In) ainsi que d'un autre métal pour former des halogénures métalliques caractérisée en ce que l'atmosphère contient du gallium (Ga) comme autre métal.
  2. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que la quantité du gallium (Ga) est comprise entre 0,02 mg et 1mg par cm3 du volume de l'enceinte.
  3. Lampe à décharge à halogénure métallique suivant la revendication 2 caractérisée ce que la quantité du gallium (Ga) est comprise entre 0,03 mg et 0,2 mg par cm3 du volume de l'enceinte.
  4. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que la quantité de l'aluminium (Al) est comprise entre 0,01 mg et 2mg par cm3 du volume de l'enceinte.
  5. Lampe à décharge à halogénure métallique suivant la revendication 4, caractérisée en ce que la quantité de l'aluminium (Al) est comprise entre 0,02 mg et 0,2mg par cm3 du volume de l'enceinte.
  6. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que la quantité de l'indium (In) est comprise entre 0,03 mg et 0,5mg par cm3 du volume de l'enceinte.
  7. Lampe à décharge à halogénure métallique suivant la revendication 6, caractérisée en ce que la quantité de l'indium (In) est comprise entre 0,05 mg et 0,3mg par cm3 du volume de l'enceinte.
  8. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce le rapport pondéral entre l'indium (In) et l'aluminium (Al) est compris entre 0,5 et 20.
  9. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que le rapport pondéral entre le gallium (Ga) et l'aluminium (Al) est compris entre 0,1 et 10.
  10. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que le rapport pondéral entre le gallium (Ga) et l'indium (In) est compris entre 0,1 et 5.
  11. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que l'enceinte de décharge contient comme halogène, pour les composés halogénures, de l'iode (l) et du brome (Br) en un rapport pondéral compris entre 0,5 et 10.
  12. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que deux électrodes se font face à l'intérieur de l'enceinte de décharge, la distance entre les électrodes étant au plus de 10 millimètres.
  13. Lampe à décharge à halogénure métallique suivant la revendication 12, caractérisée en ce que la distance entre les électrodes est comprise 1 mm et 6 mm
  14. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisé en ce que les électrodes sont disposées sur la paroi extérieure de l'enceinte de décharge, un diélectrique supplémentaire pouvant se trouver éventuellement entre l'électrode et la paroi extérieure.
  15. Lampe à décharge à halogénure métallique suivant la revendication 1, caractérisée en ce que la lampe forme une unité de construction avec un réflecteur optique.
EP95934051A 1994-10-26 1995-10-10 Lampe a decharge a halogenure metallique a usage photo-optique Expired - Lifetime EP0788655B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4438294 1994-10-26
DE4438294A DE4438294A1 (de) 1994-10-26 1994-10-26 Metallhalogenid-Entladungslampe für fotooptische Zwecke
PCT/DE1995/001398 WO1996013851A1 (fr) 1994-10-26 1995-10-10 Lampe a decharge a halogenure metallique a usage photo-optique

Publications (2)

Publication Number Publication Date
EP0788655A1 EP0788655A1 (fr) 1997-08-13
EP0788655B1 true EP0788655B1 (fr) 1998-12-23

Family

ID=6531777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95934051A Expired - Lifetime EP0788655B1 (fr) 1994-10-26 1995-10-10 Lampe a decharge a halogenure metallique a usage photo-optique

Country Status (8)

Country Link
US (1) US5798612A (fr)
EP (1) EP0788655B1 (fr)
JP (1) JPH10507868A (fr)
KR (1) KR100351338B1 (fr)
CN (1) CN1089942C (fr)
CA (1) CA2201591C (fr)
DE (2) DE4438294A1 (fr)
WO (1) WO1996013851A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11238488A (ja) 1997-06-06 1999-08-31 Toshiba Lighting & Technology Corp メタルハライド放電ランプ、メタルハライド放電ランプ点灯装置および照明装置
US20060255741A1 (en) * 1997-06-06 2006-11-16 Harison Toshiba Lighting Corporation Lightening device for metal halide discharge lamp
US6483240B2 (en) * 2001-03-06 2002-11-19 Perkinelmer Optoelectronics, N.C., Inc Compact and stabilized arc high-pressure mercury lamp
DE10123926A1 (de) * 2001-03-08 2002-09-19 Optomed Optomedical Systems Gmbh Bestrahlungsanordnung
DE50212701D1 (de) 2001-03-08 2008-10-09 Optomed Optomedical Systems Gmbh Bestrahlungsanordnung zur behandlung von akne und aknenarben
DE10114680A1 (de) * 2001-03-23 2002-09-26 Philips Corp Intellectual Pty Hochdruck-Gasentladungslampe
US7847484B2 (en) * 2004-12-20 2010-12-07 General Electric Company Mercury-free and sodium-free compositions and radiation source incorporating same
US7486026B2 (en) * 2006-11-09 2009-02-03 General Electric Company Discharge lamp with high color temperature
CN103035473B (zh) * 2011-09-30 2016-01-20 有研稀土新材料股份有限公司 一种用于金卤灯的发光药丸

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52314B1 (fr) * 1971-05-11 1977-01-06
FR2301091A1 (fr) * 1975-02-14 1976-09-10 Central Eclairage Lab Lampe a decharge riche en radiations ultraviolettes
JPS5231583A (en) * 1975-09-05 1977-03-10 Toshiba Corp Lamp discharging metallic fumes
JPS5517919A (en) * 1978-07-24 1980-02-07 Toshiba Corp Discharge lamp
JPS5580259A (en) * 1978-12-13 1980-06-17 Japan Storage Battery Co Ltd Metal halide lamp
DD254270A1 (de) * 1984-03-13 1988-02-17 Akad Wissenschaften Ddr Kurzbogenlampe mit leuchtzusaetzen
JPS61165947A (ja) * 1985-01-17 1986-07-26 Mitsubishi Electric Corp 金属蒸気放電灯
EP0344732B1 (fr) * 1988-06-03 1994-10-26 Forschungszentrum Jülich Gmbh Lampe à décharge aux halogénures métalliques
KR910008156B1 (ko) * 1989-12-29 1991-10-10 원철희 메탈 할라이드 램프
US5220237A (en) * 1990-05-31 1993-06-15 Iwasaki Electric Co., Ltd. Metal halide lamp apparatus
DE4327534A1 (de) * 1993-08-16 1995-02-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidentladungslampe für fotooptische Zwecke
DE9401436U1 (de) * 1994-01-28 1994-03-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidentladungslampe für Projektionszwecke

Also Published As

Publication number Publication date
DE59504652D1 (de) 1999-02-04
EP0788655A1 (fr) 1997-08-13
CN1161757A (zh) 1997-10-08
CN1089942C (zh) 2002-08-28
CA2201591A1 (fr) 1996-05-09
KR970707570A (ko) 1997-12-01
KR100351338B1 (ko) 2002-11-18
US5798612A (en) 1998-08-25
CA2201591C (fr) 2002-03-05
JPH10507868A (ja) 1998-07-28
WO1996013851A1 (fr) 1996-05-09
DE4438294A1 (de) 1996-05-02

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