EP0503429B1 - Single-cap lamp - Google Patents
Single-cap lamp Download PDFInfo
- 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
Links
- 239000011521 glass Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 description 12
- 238000009826 distribution Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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)
Description
Die Erfindung betrifft elektrische Lampen mit kreiszylindrischem oder abschnittsweise kreiszylindrischem Glaskolben gemäß dem Oberbegriff des Anspruches 1, wie sie heute z.B. in Leuchten und Scheinwerfern, insbesondere für Fernseh-, Film- und Photoaufnahmezwecke, üblich sind.
Bei Fernseh-, Film- oder Photoinnennaufnahmen und häufig auch bei Außenaufnahmen muß mit künstlicher Zusatzbeleuchtung gearbeitet werden. Weit verbreitet sind hierfür heute Leuchten und Scheinwerfer, die mit Halogenglühlampen bestückt sind.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.
Mit der Einführung des Farbfernsehens wurden für diese Einsatzgebiete forciert auch Entladungslampen entwickelt, die mit hohem Wirkungsgrad ein dem natürlichen Tageslicht sehr ähnliches Licht erzeugen.With the introduction of color television, discharge lamps were also developed for these areas of application, which produce light that is very similar to natural daylight with high efficiency.
Aus geometrisch-optischen Gründen werden in den Leuchten und Scheinwerfern bevorzugt einseitig gesockelte Lampen verwendet. Die Lampen werden vorteilhaft in der Symmetrieachse des i. a. rotationssymmetrischen Leuchten-bzw. Scheinwerferreflektors angeordnet. Die mechanische Halterung und Sockelkontaktierung erfolgt auf der Reflektorscheitelseite. Dadurch werden störende Abschattungen durch den Sockel oder die Stromzuführungen in Ausstrahlrichtung vermieden.For geometrical-optical reasons, 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.
Die in Ausstrahlrichtung des Reflektors liegende Lampenkolbenseite ist häufig kuppenförmig geformt und enthält aus fertigungstechnischen Gründen die Abziehstelle des Pumprohres, durch das die Lampe evakuiert worden ist und die erforderlichen Füllungen eingebracht worden sind.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.
Insbesondere bei schwacher Lichtbündelung, d.h., bei relativ kleiner Beleuchtungsstärke in einem relativ großen ausgeleuchteten Feld, einer Ausleuchtung, wie sie häufig für die Aufhellung von Szenen benötigt wird, werden jedoch oft ein oder mehrere Bereiche erhöhter Beleuchtungsstärke nahe der Mitte des ausgeleuchteten Feldes beobachtet.Particularly in the case of weak light bundling, i.e., with relatively low illuminance in a relatively large illuminated field, illumination as is often required for brightening scenes, one or more areas of increased illuminance are often observed near the center of the illuminated field.
Bei Leuchten bzw. Scheinwerfern, die mit Entladungslampen bestückt sind, beobachtet man ringförmige, annähernd zur Mitte des ausgeleuchteten Feldes konzentrische Bereiche erhöhter Beleuchtungsstärke.In the case of lights or headlights which are equipped with discharge lamps, ring-shaped areas of increased illuminance are observed which are concentric approximately to the center of the illuminated field.
Ursache hierfür ist eine Lichtsammelwirkung der Pumprohrabziehstelle auf der Kolbenkuppe; die ringförmigen Bereiche erhöhter Beleuchtungsstärke um das Zentrum des ausgeleuchteten Feldes herum entstehen durch eine abschattende Wirkung von Elektrode und Stromzuführung auf der dem Sockel abgewandten Seite des in der Lampenlängsachse montierten Entladungsbrenners.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.
Nach der US 3,384,771 ist eine Quecksilberdampf-Hochdruck-Reflektorlampe mit pilzförmigem, vorteilhaft auf seiner gesamten Innenoberfläche leicht mattiertem Außenkolben bekannt, bei der eine in Form heller und dunkler Bänder und als "hot spot" auf der optischen Achse auftretende ungleichmäßige Lichtstärkeverteilung durch eine kräftige Mattierung der Außenoberfläche des Brenners beseitigt wird. Die dort offenbarte Lampe trägt jedoch keine lichtsammelnde Pumprohrabziehstelle auf der Kolbenkuppe, außerdem weist der Kolben keine vorzugsweise kreiszylindrische Form auf.According to US Pat. No. 3,384,771, 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. However, 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.
Die EP 168 016 offenbart eine Halogenglühlampe mit einer Pumprohrabziehstelle an der Kolbenkuppe in einem Außenkolben, bei der durch Mattierung des gesamten Innen- oder des gesamten Innen- und Außenkolbens die in einem Reflektorsystem erzielte Halbwertsbreite der Lichtstärkeverteilung vergrößert wird. Die Mattierung wird hier beim Innenkolben auf der Außen-oder Innenseite, beim Außenkolben nur auf der Innenseite vorgenommen. Eine störende Lichtsammelwirkung der Pumprohrabziehstelle wird jedoch nicht erwähnt.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.
Bei der aus der EP 354 620 A1 bekannten Kfz-Scheinwerferlampe wird die eine Pumprohrabziehstelle enthaltene Kolbenkuppe zur Abschirmung eines störenden Teiles des abgestrahlten Lichtes durch Schwärzung mit einer temperaturfesten Farbe völlig lichtundurchlässig gemacht. Die Pumprohrabziehstelle ist hier natürlich optisch wirkungslos.In the motor vehicle headlight lamp known from EP 354 620 A1, 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.
Die FR 1.479.439 offenbart eine Reflektorglühlampe mit birnenförmigem Kolben, die zur Erhöhung der Lichtausbeute und zur gleichzeitigen thermischen Entlastung des Sockels einen zwischen Glühwendel und Sockel integrierten Reflektor aufweist. Die Kolbenkuppe ist hier in einem Bereich von ca. 120 Grad mattiert, um das von dem genannten Reflektor nach vorn geworfene Licht auf einen zweiten Reflektor zu lenken, der ein weites Lichtbündel erzeugen soll. Die Kolbenkuppe enthält jedoch keine Pumprohrabziehstelle.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. However, the piston crown does not contain a pump tube extraction point.
Es ist die Aufgabe der Erfindung, die beim Einsatz von einseitig gesockelten Entladungslampen in Leuchten bzw. Scheinwerfern durch Lichtsammelwirkung der Pumprohrabziehstelle auf der Kolbenkuppe verursachte ungleichmäßige Ausleuchtung im Zentrum oder in der näheren Umgebung des Zentrums des ausgeleuchteten Feldes zu vermeiden.It is the object of the invention to avoid the uneven illumination in the center or in the immediate vicinity of the center of the illuminated field caused by the light collecting effect of the pump tube extraction point on the piston crown when using discharge lamps with a base on one side in lights or headlights.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.
Eine erfindungsgemäße Mattierung der Kolbenkuppe kann z.B. vorteilhaft durch Sandstrahlen erfolgen.Matting the piston crown according to the invention can e.g. advantageously done by sandblasting.
Bei diesem Mattierungsverfahren wird z.B. feiner Quarzsand mit einer mittleren Korngröße von 150 µm mit Hilfe von Preßluft bei 5 bar Druck durch eine Düse von ca. 3 mm Durchmesser beschleunigt und trifft mit hoher Geschwindigkeit auf die Kolbenkuppe.With this matting process e.g. Fine quartz sand with an average grain size of 150 µm 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.
Nach wenigen Sekunden ist durch den hierdurch verursachten Glasabrieb die Oberfläche der Kolbenkuppe durch Aufrauhen so stark mattiert, daß dort praktisch keine gerichtete Transparenz mehr, sondern nur noch ungerichtete Transparenz vorhanden ist.After a few seconds, 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.
Der Einfluß der erfindungsgemäßen Mattierung der Lampenkuppe auf die Lichtstärkeverteilung wird nachfolgend anhand von Messungen der Lichtstärkeverteilung an einer einseitig gesockelten Entladungslampe vor und nach der Kolbenkuppenmattierung verdeutlicht. Es zeigt
- Figur 1
- eine einseitig gesockelte Entladungslampe als Ausführungsbeispiel schematisch in Seitenansicht
- Figur 2
- die Lichtstärkeverteilung der Entladungslampe von Figur 1 vor der Kolbenkuppenmattierung
- Figur 3
- die Lichtstärkeverteilung der Entladungslampe von Figur 1 nach der Kolbenkuppenmattierung.
- Figure 1
- a discharge lamp capped on one side as an exemplary embodiment schematically in side view
- Figure 2
- the light intensity distribution of the discharge lamp of Figure 1 before the bulb tip frosting
- Figure 3
- the light intensity distribution of the discharge lamp of Figure 1 after the bulb tip frosting.
Die in Figur 1 dargestellte einseitig gesockelte Entladungslampe 21 ist eine Halogenmetalldampflampe von 1200 W Leistungsaufnahme, die mit hohem Wirkungsgrad ein dem natürlichen Tageslicht sehr ähnliches Licht erzeugt. Sie besteht aus einem Hochdruckentladungsbrenner 22, der in einem gasdicht verschlossenen kreiszylindrischen Lampenaußenkolben 23 auf dessen Längsachse montiert ist. Der Lampenkolben 23 besteht aus Quarzglas und ist mit ca. 500 hPa Stickstoff gefüllt. Er ist auf einem G 38-Stiftsockel aufgekittet.The
Es sind auch Halogenmetalldampflampen bekannt, bei denen der kreiszylindrische Lampenaußenkolben in Höhe des Hochdruckentladungsbrenners 22 aus thermischen Gründen ellipsoidförmig erweitert, "aufgebaucht" ist. Die verrundete Kolbenkuppe 25 auf der dem Sockel 24 abgewandten Seite des Lampenaußenkolbens 23 enthält die Abziehstelle 26 des Pumprohres, durch das der Lampenaußenkolben 23 im Fertigungsprozeß evakuiert und anschließend mit Stickstoff gefüllt worden ist.Metal halide lamps are also known in which the circular-cylindrical lamp outer bulb at the level of the high-
Die Sockelstifte 27, 28 sind über gasdicht in den Lampenaußenkolben 23 eingequetschte Molybdänfolien elektrisch leitend mit den Stromzuführungen 29, 30 des Hochdruckentladungsbrenners 22 verbunden. Die Stromzuführungen 29, 30 bestehen aus stabilen Molybdändrähten, die auch für die mechanische Halterung des Hochdruckentladungsbrenners 22 sorgen.The
Der ellipsoidförmige Hochdruckentladungsbrenner 22 besteht ebenfalls aus Quarzglas. Er enthält eine Füllung von ca. 400 hPa Argon sowie geringe Mengen an Quecksilber, Cäsium und Halogeniden der Seltenenerdelemente.The ellipsoidal high-
Die Stromzuführungen zu seinen Wolframstiftelektroden 31, 32 sind gasdicht in die in bekannter Weise aus thermischen Gründen mattierten Brennerschäfte 33, 34 eingeschmolzene Molybdänfolien 35, 36, die durch Punktschweißungen mit den Stromzuführungen 29, 30 und den Elektroden 31, 32 elektrisch leitend verbunden sind.The current leads to its
Zwischen den Elektroden 31, 32 brennt bei Lampenbetrieb ein leuchtender Entladungsbogen, in dem vorzugsweise die Seltenenerdelemente zur Lichtemission angeregt werden.During operation of the lamp, a luminous discharge arc burns between the
Die gesamte Kolbenkuppe 25 des Lampenaußenkolbens 23 einschließlich der Pumprohrabziehstelle 26 ist zur Unterdrückung der gerichteten Transparenz, z.B. durch Sandstrahlen, mattiert.The
Figur 2 zeigt in Polarkoordinatendarstellung die Lichtstärkeverteilung einer einseitig gesockelten Entladungslampe, wie sie in Figur 1 dargestellt ist, jedoch mit nichtmattierter Kolbenkuppe 25.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
Die Hauptausstrahlrichtung ist senkrecht zur Lampenlängsachse in einem Winkelbereich von ca. 120 Grad.The main beam direction is perpendicular to the lamp longitudinal axis in an angular range of approx. 120 degrees.
Die Lichtstärke besitzt jedoch infolge der Lichtsammelwirkung der Pumprohrabziehstelle 26 auf der Kolbenkuppe 25 ein scharf ausgeprägtes störendes Maximum in Richtung der Kolbenkuppe 25.However, due to the light collecting effect of the pump
Da der durch den kuppenseitigen Brennerschaft 33 transportierte Lichtstrom hier durch die Elektrode 31 und die betreffende Stromzuführung eine gewisse Abschattung erfährt, ist die Lichtstärke direkt auf der Symmetrieachse etwas kleiner als unmittelbar daneben.Since the luminous flux transported through the dome-
Hierdurch werden störende ringförmige Bereiche erhöhter Beleuchtungsstärke im Zentrum des ausgeleuchteten Feldes beobachtet.In this way, disturbing annular areas of increased illuminance are observed in the center of the illuminated field.
Figur 3 zeigt die Lichtstärkeverteilung derselben einseitig gesockelten Entladungslampe 21, jedoch mitmattierter Kolbenkuppe.FIG. 3 shows the light intensity distribution of the
Das scharf ausgeprägte Lichtstärkemaximum in Kolbenkuppenrichtung ist bis auf einen unwesentlichen, nicht mehr störenden Rest durch die die gerichtete Transparenz unterdrückende Mattierung der Kolbenkuppe einschließlich Pumprohrabziehstelle praktisch verschwunden.The sharply defined maximum light intensity in the direction of the piston crown has practically disappeared except for an insignificant, no longer disturbing remainder due to the matting of the piston crown including the pump tube extraction point, which suppresses the directional transparency.
Claims (1)
- Single-cap electrical discharge lamp (21) having, connected to external supply conductors, a high-pressure discharge vessel as the light source (22) in a glass bulb (23) which is circular-cylindrical or circular-cylindrical in sections and is closed off in the shape of a bowl on the side remote from the cap (24), characterized in that the bowl (25) of the bulb is partially or fully matted and contains a pumping tip (26) whose surface is matted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4108316 | 1991-03-14 | ||
| DE4108316A DE4108316A1 (en) | 1991-03-14 | 1991-03-14 | ELECTRIC LAMP BASED ON ONE SIDE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0503429A2 EP0503429A2 (en) | 1992-09-16 |
| EP0503429A3 EP0503429A3 (en) | 1992-12-23 |
| EP0503429B1 true EP0503429B1 (en) | 1996-10-23 |
Family
ID=6427299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92103566A Expired - Lifetime EP0503429B1 (en) | 1991-03-14 | 1992-03-02 | Single-cap lamp |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0503429B1 (en) |
| JP (1) | JPH05109392A (en) |
| CA (1) | CA2061898C (en) |
| DE (2) | DE4108316A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29507422U1 (en) * | 1994-05-10 | 1995-06-29 | Philips Electronics N.V., Eindhoven | Socketed high-pressure discharge lamp |
| DE102004005903A1 (en) * | 2004-02-05 | 2005-08-25 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High-pressure discharge lamp and method for producing a high-pressure discharge lamp |
| CA2540418A1 (en) * | 2005-03-24 | 2006-09-24 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | High-pressure discharge lamp |
Family Cites Families (6)
| 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 (en) * | 1966-03-22 | 1967-05-05 | Triple effect incandescent lamp | |
| ZA854950B (en) * | 1984-07-09 | 1986-02-26 | Gte Prod Corp | Tungsten-halogen lamp including diffusing means as part thereof |
| JPS61225755A (en) * | 1985-03-29 | 1986-10-07 | 東芝ライテック株式会社 | Electric bulb |
| JPS6271161A (en) * | 1985-09-25 | 1987-04-01 | Iwasaki Electric Co Ltd | High-pressure metal-vapor discharge lamp |
| DE3827451C1 (en) * | 1988-08-12 | 1989-10-12 | Philips Patentverwaltung Gmbh, 2000 Hamburg, De |
-
1991
- 1991-03-14 DE DE4108316A patent/DE4108316A1/en not_active Withdrawn
-
1992
- 1992-02-26 CA CA002061898A patent/CA2061898C/en not_active Expired - Fee Related
- 1992-03-02 DE DE59207396T patent/DE59207396D1/en not_active Expired - Lifetime
- 1992-03-02 EP EP92103566A patent/EP0503429B1/en not_active Expired - Lifetime
- 1992-03-11 JP JP4087744A patent/JPH05109392A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0503429A3 (en) | 1992-12-23 |
| CA2061898A1 (en) | 1992-09-15 |
| CA2061898C (en) | 2000-10-17 |
| EP0503429A2 (en) | 1992-09-16 |
| DE4108316A1 (en) | 1992-09-17 |
| JPH05109392A (en) | 1993-04-30 |
| DE59207396D1 (en) | 1996-11-28 |
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