EP0479088B1 - Hochdruckentladungslampe und Verfahren zur Herstellung der Lampe - Google Patents

Hochdruckentladungslampe und Verfahren zur Herstellung der Lampe Download PDF

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Publication number
EP0479088B1
EP0479088B1 EP91116146A EP91116146A EP0479088B1 EP 0479088 B1 EP0479088 B1 EP 0479088B1 EP 91116146 A EP91116146 A EP 91116146A EP 91116146 A EP91116146 A EP 91116146A EP 0479088 B1 EP0479088 B1 EP 0479088B1
Authority
EP
European Patent Office
Prior art keywords
hollow
cylindrical
tubes
discharge space
tube
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
EP91116146A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0479088A1 (de
Inventor
Bernd Lewandowski
Dieter Franke
Walter Kiele
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
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Publication of EP0479088A1 publication Critical patent/EP0479088A1/de
Application granted granted Critical
Publication of EP0479088B1 publication Critical patent/EP0479088B1/de
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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
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals

Definitions

  • the invention relates to a high-pressure discharge lamp for lamp currents greater than 20 A according to the preamble of claim 1.
  • High-pressure discharge lamps of this type with a metal halide filling are used in particular for illuminating stages or for film and television recordings, where high luminous fluxes with daylight-like color temperature and very good color rendering are required.
  • Other high-pressure discharge lamps of this type with a mercury gas filling are used in particular in the production of electronic components.
  • Such a lamp with a metal halide filling is e.g. known from DE-PS 34 27 280.
  • the high-pressure discharge lamp from this patent has a metal halide filling and, at an operating current of 65 A and a power consumption of 12,000 W, produces a luminous flux of 1,100,000 lm.
  • the two pin-shaped electrodes are melted gas-tight into the lamp necks by means of a molybdenum sealing film.
  • a high-pressure discharge lamp is known from EP-A-0 115 921, the electrode melts of which each have a plurality of sealing foils.
  • the sealing foils are melted between the outer bulb neck and an inner quartz glass tube, the end of which faces the discharge space is sealed off.
  • the discharge-side ends of the sealing foils are welded to the electrode shaft and are wrapped in a tungsten wire in the area of this welding transition. Due to the wire wrapping, fractures are prevented at these points during cooling despite the quartz glass being strongly pressed on.
  • a flash gas discharge lamp for laser pumping is listed under application number SU-A-1092-608-A.
  • the gas-tight melting of the electrodes takes place in this lamp by means of a molybdenum foil cylinder, in which three to eight sealing foils are embedded like corkscrews between the outer surface of a quartz glass insert and the outer bulb neck.
  • the object of the invention is to provide a high-pressure discharge lamp, the electrode melts can be loaded with high operating currents without damage.
  • the electrode seals should have a simple process engineering structure in accordance with the requirements.
  • a high-pressure discharge lamp which has a structure in accordance with the characterizing features of claim 1. Further advantageous features of the lamp can be found in the subclaims.
  • the construction of the piston necks from two nested hollow cylindrical quartz glass tubes, between which at least two, advantageously four, elongate sealing foils are melted in a gas-tight manner, results in a significantly lower current load for the individual sealing foil. If the sealing foils are arranged at equal intervals over the circumference of the inner hollow cylindrical quartz glass tube parallel to the longitudinal axis of the bulb neck, the neck is heated up evenly over the circumference during operation of the lamp. In this way, overloads in the melting due to large temperature differences can be prevented.
  • the interior of the piston necks is hollow and, because the bases attached to the ends of the necks have a corresponding opening, air can flow through them. This enables additional heat dissipation from the bulb neck during lamp operation. This heat dissipation can be further reinforced by a rod made of heat-dissipating material, which protrudes in isolation into the hollow cylindrical opening of the piston neck.
  • the structure of the lamp necks allows operating currents of up to 130 A without damaging the melts and thus reducing the average lamp life. With these high currents and power consumption of up to 24,000 W, high-pressure discharge lamps can be built that emit luminous fluxes of over 2 million lm with a metal halide fill.
  • the invention also relates to a method for producing a high-pressure discharge lamp, as claimed in the claims.
  • a hollow cylindrical outer tube made of quartz glass is first melted at the two ends lying in the axis after the rotationally symmetrical discharge space has been produced.
  • a hollow cylindrical inner tube made of quartz glass is now pushed into each melted outer tube, which is closed at its end facing the discharge space and widens in an olive shape at its end facing away from the discharge space.
  • This inner tube can now turn consist of two nested quartz glass tubes, the inner of the two tubes having the features listed above and the outer of the two tubes is open to the discharge space and is closed at its other end by fusion with the inner tube.
  • the construction of the inner tube from two tubes offers the advantage that when the sealing films are subsequently melted, a visual check of the melting quality is made possible.
  • the films are only melted well if the quartz glass of the two inner tubes has softened to such an extent that the outer contours of the tubes are no longer visible.
  • the metal disc with the electrode and the sealing foils attached to it is placed on the end of the tube facing the discharge space.
  • the outer edge of the olive-shaped end is fused to the inner wall of the outer tube.
  • the sealing foils are melted gas-tight between the two tubes, a vacuum of 20 mbar argon being generated in the space between the two tubes and air pressure of 1 bar being generated in the interior of the hollow cylindrical inner tube.
  • the end of the piston neck is separated with the olive-shaped end of the inner tube and the sealing foils are electrically connected to the base attached to the end of the neck.
  • the lamp bulb 1 made of quartz glass consists of a largely cylindrical, rotationally symmetrical discharge space 2, at the two ends of which lie in the axis, a cylindrical bulb neck 3, 4 is melted.
  • the two pin electrodes 5, 6 made of tungsten protrude into the discharge space 2 and are inserted with their shaft ends into a central hole in a circular cylindrical disk 7, 8 made of molybdenum and soldered firmly with platinum solder.
  • the electrical connection of the pin electrodes 5, 6 with the bases 9, 10 of the type s 30x70, which are attached to the free ends of the piston necks 3, 4, is made by four band-shaped molybdenum sealing foils, of which only three each 11 to 16 are visible.
  • the sealing foils 11 to 16 are welded at one end to the respective panes 7, 8 and at their other ends to the ones here not visible power supplies connected, which make electrical contact with the bases 9,10.
  • the sealing foils 11 to 16 are sealed in a gas-tight manner between two hollow cylindrical quartz glass tubes from which the piston necks 3, 4 are composed.
  • the two piston necks 3, 4 have a central bore 17, 18, which extends to just in front of the molybdenum disks 7, 8 and enables air convection in the piston necks 3, 4 through openings (not visible here) in the bases 9, 10.
  • the piston neck consists of a hollow cylindrical outer tube 19 which is fused to the rotationally symmetrical discharge space 2.
  • a hollow cylindrical inner tube made of quartz glass is pushed into the outer tube 19, which in turn consists of two tubes 20, 21 pushed into one another.
  • the inner 20 of the two tubes 20, 21 is provided with a seal 22 at its end facing the discharge space 2 and has an olive-shaped extension 23 at its end facing away from the discharge space 2.
  • the outer wall of the olive-shaped extension 23 touches the inner wall of the outer tube 19.
  • the outer 21 of the two inner tubes is open to the discharge space 2 and is fused to the inner tube 20 at its end facing away from the discharge space 2 near the olive-shaped extension 23.
  • the disc 8 made of molybdenum with the tungsten electrode 6 attached to it and the four welded molybdenum sealing foils, of which only two 14, 16 are visible, is placed on the inner tube consisting of the two tubes 20, 21 pushed into one another.
  • the sealing foils 14, 16 run parallel to the axis of the piston neck between the outer tube 19 and the outer tube 20 of the inner tube.
  • a hollow cylindrical tube piece 24 made of quartz glass is placed over the shaft of the pin electrode 6 and, after melting, provides a seal between the discharge space 2 and the molybdenum disk 8.
  • the piston neck is shown in cross-section at point AB before the melting, looking in the direction of the discharge space.
  • the figure shows the hollow cylindrical outer tube 19 and the two hollow cylindrical inner tubes 20, 21. In between, part of the molybdenum washer 8 and the four molybdenum sealing foils 14, 15, 16, 25 evenly distributed over the circumference of the inner tube 21 can be seen.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP91116146A 1990-10-02 1991-09-23 Hochdruckentladungslampe und Verfahren zur Herstellung der Lampe Expired - Lifetime EP0479088B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4031116 1990-10-02
DE4031116A DE4031116A1 (de) 1990-10-02 1990-10-02 Hochdruckentladungslampe und verfahren zur herstellung der lampe

Publications (2)

Publication Number Publication Date
EP0479088A1 EP0479088A1 (de) 1992-04-08
EP0479088B1 true EP0479088B1 (de) 1995-12-20

Family

ID=6415413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116146A Expired - Lifetime EP0479088B1 (de) 1990-10-02 1991-09-23 Hochdruckentladungslampe und Verfahren zur Herstellung der Lampe

Country Status (4)

Country Link
US (1) US5264759A (ja)
EP (1) EP0479088B1 (ja)
JP (1) JPH04262361A (ja)
DE (2) DE4031116A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603301C2 (de) * 1996-01-30 2001-02-22 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrische Lampe mit Molybdänfoliendurchführungen für ein Lampengefäß aus Quarzglas
DE19603300C2 (de) * 1996-01-30 2001-02-22 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrische Lampe mit Molybdänfoliendurchführungen für ein Lampengefäß aus Quarzglas

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486737A (en) * 1994-04-12 1996-01-23 Osram Sylvania Inc. Heavily loaded double-ended arc lamp
US5793160A (en) * 1996-11-15 1998-08-11 Superior Quartz Products, Inc. Platform-based multiple foil high current electrode attachment for medium pressure quartz lamps
DE19825004A1 (de) 1998-04-24 1999-10-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
DE19961551A1 (de) * 1999-12-20 2001-06-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einschmelzfolie und zugehörige Lampe mit dieser Folie
US20060170361A1 (en) * 2005-01-31 2006-08-03 Osram Sylvania Inc. Single-ended Arc Discharge Vessel with a Divider Wall
DE102006026940A1 (de) 2006-06-09 2007-12-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US7728495B2 (en) * 2007-08-01 2010-06-01 Osram Sylvania Inc. HID lamp with frit seal thermal control
CN108251887A (zh) * 2016-12-29 2018-07-06 上海亚尔光源有限公司 一种超高压点光源用封接钼片的制作方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB663309A (en) * 1948-05-01 1951-12-19 British Thomson Houston Co Ltd Improvements relating to the production of quartz-to-metal seals
US2786882A (en) * 1951-01-25 1957-03-26 Krefft Hermann Eduard Lead-in seal for electrical discharge devices
US3351803A (en) * 1964-11-12 1967-11-07 Westinghouse Electric Corp Seal and lead-in conductor assembly for gaseous discharge lamps
US3675068A (en) * 1970-09-10 1972-07-04 Duro Test Corp Seal structures for electric discharge lamps
GB2072937B (en) * 1980-03-27 1984-05-02 Ilc Technology Inc High intensity discharge lamps
GB8303074D0 (en) * 1983-02-04 1983-03-09 Gen Electric Co Plc Electric discharge lamps
DE3427280C2 (de) * 1984-07-24 1986-06-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Metallhalogenid-Hochdruckentladungslampe
US4959587A (en) * 1989-01-13 1990-09-25 Venture Lighting International, Inc. Arc tube assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603301C2 (de) * 1996-01-30 2001-02-22 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrische Lampe mit Molybdänfoliendurchführungen für ein Lampengefäß aus Quarzglas
DE19603300C2 (de) * 1996-01-30 2001-02-22 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrische Lampe mit Molybdänfoliendurchführungen für ein Lampengefäß aus Quarzglas

Also Published As

Publication number Publication date
JPH04262361A (ja) 1992-09-17
DE4031116A1 (de) 1992-04-09
DE59107117D1 (de) 1996-02-01
US5264759A (en) 1993-11-23
EP0479088A1 (de) 1992-04-08

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