EP0503429B1 - Lampe fixée d'un cÔté - Google Patents

Lampe fixée d'un cÔté Download PDF

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Publication number
EP0503429B1
EP0503429B1 EP92103566A EP92103566A EP0503429B1 EP 0503429 B1 EP0503429 B1 EP 0503429B1 EP 92103566 A EP92103566 A EP 92103566A EP 92103566 A EP92103566 A EP 92103566A EP 0503429 B1 EP0503429 B1 EP 0503429B1
Authority
EP
European Patent Office
Prior art keywords
bulb
lamp
light
base
pump 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
EP92103566A
Other languages
German (de)
English (en)
Other versions
EP0503429A2 (fr
EP0503429A3 (en
Inventor
Michael Dr. Gassmann
Fritz Consten
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
Publication of EP0503429A2 publication Critical patent/EP0503429A2/fr
Publication of EP0503429A3 publication Critical patent/EP0503429A3/de
Application granted granted Critical
Publication of EP0503429B1 publication Critical patent/EP0503429B1/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
    • H01J61/30—Vessels; Containers

Definitions

  • the invention relates to electric lamps with a circular-cylindrical or partially circular-cylindrical glass bulb according to the preamble of claim 1, as are customary today, for example, in lamps and headlights, in particular for television, film and photo recording purposes. Additional artificial lighting must be used for television, film or photo indoor shots and often also for outdoor shots. Luminaires and headlights that are equipped with halogen bulbs are widely used today.
  • lamps with a base on one side are preferably used in the lights and headlights.
  • the lamps are advantageously in the axis of symmetry of the i. a. rotationally symmetrical lights or Headlight reflector arranged.
  • the mechanical mounting and base contacting takes place on the top of the reflector. This prevents annoying shadowing from the base or the power supply in the direction of radiation.
  • the lamp bulb side lying in the beam direction of the reflector is often dome-shaped and contains the extraction point of the pump tube through which the lamp has been evacuated and the necessary fillings have been introduced for manufacturing reasons.
  • the reason for this is a light collecting effect of the pump tube extraction point on the piston top; the ring-shaped areas of increased illuminance around the center of the illuminated field are created by a shadowing effect of the electrode and the power supply on the side of the discharge burner mounted in the lamp longitudinal axis facing away from the base.
  • a high-pressure mercury vapor reflector lamp with a mushroom-shaped outer bulb which is advantageously slightly matt on its entire inner surface, is known, in which an uneven appearance in the form of light and dark bands and as a "hot spot" on the optical axis Luminous intensity distribution is eliminated by a strong matting of the outer surface of the burner.
  • the lamp disclosed there does not have a light-collecting pump tube extraction point on the bulb top, moreover the bulb does not have a preferably circular-cylindrical shape.
  • EP 168 016 discloses a halogen incandescent lamp with a pump tube extraction point on the bulb top in an outer bulb, in which the half-width of the light intensity distribution achieved in a reflector system is increased by matting the entire inner or the entire inner and outer bulb. The matting is carried out on the inside or outside of the inner bulb, and only on the inside of the outer bulb. A disturbing light collecting effect of the pump tube extraction point is not mentioned.
  • the bulb top which contains a pump tube extraction point, is made completely opaque to shield a disruptive part of the emitted light by blackening with a temperature-resistant color.
  • the pump tube extraction point is of course optically ineffective here.
  • FR 1,479,439 discloses a reflector incandescent lamp with a pear-shaped bulb, which has an integrated reflector between the incandescent filament and the base in order to increase the luminous efficacy and simultaneously relieve the thermal load on the base.
  • the piston crown is matted here in a range of approx. 120 degrees, to the front of the reflector mentioned to direct the thrown light onto a second reflector, which is to produce a wide beam of light.
  • the piston crown does not contain a pump tube extraction point.
  • Matting the piston crown according to the invention can e.g. advantageously done by sandblasting.
  • Fine quartz sand with an average grain size of 150 ⁇ m is accelerated with compressed air at 5 bar pressure through a nozzle of approx. 3 mm diameter and hits the piston crown at high speed.
  • the glass abrasion caused by this causes the surface of the piston crown to be so matted by roughening that there is practically no more directional transparency, but only non-directional transparency.
  • the discharge lamp 21 with a base on one side shown in FIG. 1 is a metal halide lamp with a power consumption of 1200 W, which produces a light which is very similar to natural daylight with high efficiency. It consists of a high-pressure discharge burner 22 which is mounted in a gas-tight, circular-cylindrical lamp outer bulb 23 on its longitudinal axis.
  • the lamp bulb 23 consists of quartz glass and is filled with approximately 500 hPa nitrogen. It is cemented onto a G 38 pin base.
  • Metal halide lamps are also known in which the circular-cylindrical lamp outer bulb at the level of the high-pressure discharge burner 22 is expanded, "bulged", in an ellipsoidal shape for thermal reasons.
  • the rounded bulb top 25 on the side of the outer bulb 23 facing away from the base 24 contains the pull-off point 26 of the pump tube through which the outer bulb 23 has been evacuated in the manufacturing process and then filled with nitrogen.
  • the base pins 27, 28 are electrically conductively connected to the power supply lines 29, 30 of the high-pressure discharge burner 22 via gas-tight molybdenum foils squeezed into the lamp outer bulb 23.
  • the power supply lines 29, 30 consist of stable molybdenum wires, which also provide mechanical support for the high-pressure discharge burner 22.
  • the ellipsoidal high-pressure discharge burner 22 also consists of quartz glass. It contains a filling of approx. 400 hPa argon as well as small amounts of mercury, cesium and halides of the rare earth elements.
  • the current leads to its tungsten pin electrodes 31, 32 are gas-tight in the molybdenum foils 35, 36 which are melted in a known manner for thermal reasons and which are electrically conductively connected to the current leads 29, 30 and the electrodes 31, 32 by spot welding.
  • a luminous discharge arc burns between the electrodes 31, 32, in which the rare earth elements are preferably excited to emit light.
  • the entire bulb top 25 of the lamp outer bulb 23, including the pump tube extraction point 26, is used to suppress the directed transparency, e.g. by sandblasting, matted.
  • FIG. 2 shows in polar coordinate representation the light intensity distribution of a discharge lamp with a base on one side, as shown in FIG. 1, but with a non- frosted bulbous tip 25.
  • the main beam direction is perpendicular to the lamp longitudinal axis in an angular range of approx. 120 degrees.
  • the luminous intensity directly on the axis of symmetry is somewhat smaller than directly next to it.
  • FIG. 3 shows the light intensity distribution of the same discharge lamp 21 with a base on one side, but with a frosted bulbous tip.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (1)

  1. Lampe (21) à décharge électrique, ayant un culot d'un seul côté, comportant un tube de décharge à haute pression, à titre de source (22) lumineuse, relié à des entrées de courant extérieures, disposé dans une ampoule (23) de verre de forme cylindrique de section circulaire ou cylindrique de section circulaire par tronçon, cette ampoule étant fermée en forme de dôme du côté qui est opposé au culot (24), caractérisée en ce que le dôme (25) d'ampoule est dépoli, en partie ou entièrement et comporte un point (26) de tirage de queusot, dont la surface est dépolie.
EP92103566A 1991-03-14 1992-03-02 Lampe fixée d'un cÔté Expired - Lifetime EP0503429B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4108316A DE4108316A1 (de) 1991-03-14 1991-03-14 Einseitig gesockelte elektrische lampe
DE4108316 1991-03-14

Publications (3)

Publication Number Publication Date
EP0503429A2 EP0503429A2 (fr) 1992-09-16
EP0503429A3 EP0503429A3 (en) 1992-12-23
EP0503429B1 true EP0503429B1 (fr) 1996-10-23

Family

ID=6427299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92103566A Expired - Lifetime EP0503429B1 (fr) 1991-03-14 1992-03-02 Lampe fixée d'un cÔté

Country Status (4)

Country Link
EP (1) EP0503429B1 (fr)
JP (1) JPH05109392A (fr)
CA (1) CA2061898C (fr)
DE (2) DE4108316A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29507422U1 (de) * 1994-05-10 1995-06-29 Philips Electronics N.V., Eindhoven Gesockelte Hochdruckentladungslampe
DE102004005903A1 (de) * 2004-02-05 2005-08-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe und Herstellungsverfahren für eine Hochdruckentladungslampe
CA2540418A1 (fr) * 2005-03-24 2006-09-24 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Lampe a decharge haute pression

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384771A (en) * 1965-02-08 1968-05-21 Gen Electric Reflector discharge lamp having frosted envelope and arc tube
FR1479439A (fr) * 1966-03-22 1967-05-05 Lampe à incandescence à triple effet
ZA854950B (en) * 1984-07-09 1986-02-26 Gte Prod Corp Tungsten-halogen lamp including diffusing means as part thereof
JPS61225755A (ja) * 1985-03-29 1986-10-07 東芝ライテック株式会社 電球
JPS6271161A (ja) * 1985-09-25 1987-04-01 Iwasaki Electric Co Ltd 高圧金属蒸気放電灯
DE3827451C1 (fr) * 1988-08-12 1989-10-12 Philips Patentverwaltung Gmbh, 2000 Hamburg, De

Also Published As

Publication number Publication date
DE4108316A1 (de) 1992-09-17
CA2061898C (fr) 2000-10-17
EP0503429A2 (fr) 1992-09-16
DE59207396D1 (de) 1996-11-28
CA2061898A1 (fr) 1992-09-15
JPH05109392A (ja) 1993-04-30
EP0503429A3 (en) 1992-12-23

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