EP1156514A1 - Incandescent lamp - Google Patents

Incandescent lamp Download PDF

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Publication number
EP1156514A1
EP1156514A1 EP01108874A EP01108874A EP1156514A1 EP 1156514 A1 EP1156514 A1 EP 1156514A1 EP 01108874 A EP01108874 A EP 01108874A EP 01108874 A EP01108874 A EP 01108874A EP 1156514 A1 EP1156514 A1 EP 1156514A1
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EP
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Prior art keywords
refractive
optically
layers
interference filter
light
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Granted
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EP01108874A
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German (de)
French (fr)
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EP1156514B1 (en
Inventor
Jürgen Rümmelin
Reinhard Schäfer
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/40—Devices for influencing the colour or wavelength of the light by light filters; by coloured coatings in or on the envelope

Definitions

  • the invention relates to an incandescent lamp according to the preamble of the claim 1.
  • Such an incandescent lamp is, for example, in the European patent application EP 0 986 093 A1.
  • This document describes an incandescent lamp, the lamp vessel an interference filter coating with locally different layer thickness having.
  • the layer thickness of the interference filter varies such that all areas of the Interference filter-coated lamp vessel when the incandescent lamp is switched on Emit light of the same color composition.
  • the light bulb is as one orange or red light emitting vehicle signal lamp.
  • the light bulb according to the invention is essentially translucent rotationally symmetrical lamp vessel, one enclosed by the lamp vessel Filament and one arranged on the lamp vessel, designed as an edge filter Interference filter equipped, the interference filter optically low refractive index and optically high refractive index layers for adjusting the edge of the interference filter in the red spectral range.
  • the interference filter according to the invention at least two absorber layers, each with one arranged in between optically low refractive index layer for the absorption of blue and violet light as well as additional optically low refractive and optically high refractive index Layers to further suppress light from the violet and blue spectral range.
  • the interference filter advantageously consists of at least four stacks of Layers wherein the first stack is arranged directly on the lamp vessel and the at least two absorber layers, each with one in between optically low refractive index layer for the absorption of blue and contains violet light, and wherein at least one of the subsequent stacks the contains additional optically low-refractive and optically high-refractive layers, whose layer thicknesses are optimized so that this at least one stack a low transmission for light from the violet and blue spectral range and has a high transmission for light from the red spectral range, and the other stacks being optically low refractive and optically high refractive Layers for setting the edge of the interference filter in the red spectral range contain.
  • the layer thicknesses of the optically low refractive index and optically high refractive index Layers of these stacks are optimized so that the edge of the interference filter is in the wavelength range from 580 nm to 600 nm. In this way an interference filter with comparatively few layers can be produced, which in the wavelength range from 580 nm to 600 nm has a steep transition from the spectral range of low transmission to the spectral range of high transmission owns.
  • the first stack advantageously contains at least two absorber layers made of iron oxide Fe 2 O 3 , each with an optically low-refractive layer arranged between them.
  • Iron oxide is a material with a comparatively high optical refractive index. With a sufficiently thin layer thickness, the iron oxide layers have metallic properties in the violet and blue spectral range and dielectric properties in the red spectral range.
  • the interference effect in combination with the optically high-refractive iron oxide layers is used by adapting and optimizing their layer thickness in order to ensure high transmission of the first stack for light from the red spectral range and high reflection of the first stack for light from the blue spectral range to reach.
  • the preferred embodiment of the invention is a Incandescent lamp with an electrical power consumption of approximately 25 W, for example as a light source in the rear light to generate the tail light or Brake lights can be used.
  • This incandescent lamp has a bayonet-like lamp base 10 and a pear-shaped one which is rotationally symmetrical about the lamp axis A-A Lamp vessel 20 made of glass, which encloses a filament (not shown).
  • the outer surface of the lamp vessel 20 is coated with an interference filter 30, that has a high transmission for red light and for light of others Spectral ranges is almost impermeable.
  • the layer thickness of the interference filter 30 varies locally depending on the angle of incidence of the emitted by the filament and light incident on the interference filter 30.
  • the interference filter 30 has the smallest layer thickness and near the base the greatest layer thickness.
  • the layer thickness of the interference filter 30 increases steadily from the top to the base. The difference between the least and the maximum layer thickness is approximately 7 percent.
  • the layer thickness of the interference filter 30 is constant.
  • the Interference filter 30 consists of a total of 28 layers, which are in five stacks 31-35 are arranged.
  • the first stack 31 which is attached directly to the lamp vessel 20, consists of a first absorber layer made of Fe 2 O 3 with a physical layer thickness of approximately 8 nm and a second absorber layer made of Fe 2 O 3 with a physical layer thickness of approximately 14 nm and an optically low-refractive intermediate layer made of SiO 2 arranged between the two absorber layers and having a physical layer thickness of approximately 87 nm.
  • FIG. 3 shows curve 1 as a function of the light wavelength as a function of the light wavelength.
  • the second stack 32 is formed by a layer sequence repeated once, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 12 nm, an optically low-index layer of SiO 2 with a physical layer thickness of approximately 40 nm and an optically high-index layer Layer consists of TiO 2 with a physical layer thickness of 25 nm.
  • the second stack 32 is optional. It brings an additional reduction in the transmission of the interference filter 30 in the violet spectral range. Its transmission behavior is not shown in FIG. 3.
  • the third stack 33 is formed by a twice-repeated layer sequence, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 14 nm, an optically low-index layer of SiO 2 with a physical layer thickness of 77 nm and an optically high-index layer consists of TiO 2 with a physical layer thickness of approx. 14 nm.
  • This third stack 33 has a low transmission for light from the violet and blue spectral range and a high transmission for light from the red spectral range. In addition to the absorption filter, it serves to further suppress violet and blue light.
  • FIG. 3 shows the transmission behavior of the third stack 33 as a function of the light wavelength by curve 2.
  • the fourth stack 34 is formed by a twice-repeated layer sequence, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 24 nm, an optically low-index layer of SiO 2 with a physical layer thickness of 79 nm and an optically high-index layer TiO 2 with a physical layer thickness of 24 nm.
  • the curve 3 in FIG. 3 shows the transmission behavior of the fourth stack 34 as a function of the light wavelength.
  • the fifth stack 35 is formed by a layer sequence repeated three times, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 25 nm, an optically low-index layer of SiO 2 with a physical layer thickness of 86 nm and an optically high-index layer consists of TiO 2 with a physical layer thickness of 24 nm.
  • Curve 4 of FIG. 3 shows the transmission behavior of the fifth stack 35 as a function of the light wavelength. All layer thickness information relates to the tip of the lamp vessel 20.
  • the fourth 34 and fifth stacks 35 serve to adjust the edge of the interference filter 30 at approximately 590 nm.
  • the layer thicknesses of the SiO 2 and TiO 2 layers of these two stacks are optimized in such a way that the interference filter 30 at a light wavelength of approximately 590 nm has a steep transition from the short-wave spectral range of low transmission to the long-wave spectral range of high transmission.
  • FIG. 3 shows the transmission behavior of the entire interference filter 30 as a function of the light wavelength by curve 5.
  • the five stacks 31-35 follow one another seamlessly.
  • the interference filter 30 therefore has 28 layers.

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  • Optical Filters (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Eye Examination Apparatus (AREA)
  • Endoscopes (AREA)

Abstract

The top of the lamp bulb (20) is coated with an interference filter (30) consisting of at least four stacks of layers. One, applied to the bulb surface, absorbs blue and violet light. At least one of the subsequent stacks has high and low refracting layers with thicknesses selected so that it has a low transmission to the above light and high for red light whilst a second stack adjusts the edge of the interference filter in the red spectral region.

Description

Die Erfindung betrifft eine Glühlampe gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an incandescent lamp according to the preamble of the claim 1.

I. Stand der Technik I. State of the art

Eine derartige Glühlampe ist beispielsweise in der europäischen Offenlegungsschrift EP 0 986 093 A1 offenbart. Diese Schrift beschreibt eine Glühlampe, deren Lampengefäß eine Interferenzfilterbeschichtung mit lokal unterschiedlicher Schichtdicke aufweist. Die Schichtdicke des Interferenzfilters variiert derart, daß alle Bereiche des interferenzfilterbeschichteten Lampengefäßes im eingeschalteten Zustand der Glühlampe Licht derselben Farbzusammensetzung emittieren. Die Glühlampe ist als eine orangefarbenes oder rotes Licht emittierende Fahrzeug-Signallampe ausgebildet.Such an incandescent lamp is, for example, in the European patent application EP 0 986 093 A1. This document describes an incandescent lamp, the lamp vessel an interference filter coating with locally different layer thickness having. The layer thickness of the interference filter varies such that all areas of the Interference filter-coated lamp vessel when the incandescent lamp is switched on Emit light of the same color composition. The light bulb is as one orange or red light emitting vehicle signal lamp.

II. Darstellung der Erfindung II. Presentation of the invention

Es ist die Aufgabe der Erfindung, eine gattungsgemäße Glühlampe mit einem verbesserten Interferenzfilter zur Erzeugung von rotem Licht bereitzustellen.It is the object of the invention to provide a generic incandescent lamp with an improved To provide interference filters for generating red light.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen beschrieben.This object is achieved by the features of claim 1 solved. Particularly advantageous embodiments of the invention are in the subclaims described.

Die erfindungsgemäße Glühlampe ist mit einem lichtdurchlässigen, im wesentlichen rotationssymmetrischen Lampengefäß, einer vom Lampengefäß umschlossenen Glühwendel und einem auf dem Lampengefäß angeordneten, als Kantenfilter ausgebildeten Interferenzfilter ausgestattet, wobei das Interferenzfilter optisch niedrigbrechende und optisch hochbrechende Schichten zur Einstellung der Kante des Interferenzfilters im roten Spektralbereich aufweist. Die Schichtdicken der optisch niedrigbrechenden und optisch hochbrechenden Schichten sind, in Abhängigkeit des Einfallswinkels des von der Glühwendel emittierten und auf das Interferenzfilter auftreffenden Lichts, lokal unterschiedlich. Außerdem weist das Interferenzfilter erfindungsgemäß mindestens zwei Absorberschichter mit jeweils einer dazwischen angeordneten optisch niedrigbrechenden Zwischenschicht zur Absorption von blauem und violettem Licht sowie zusätzliche optisch niedrigbrechende und optisch hochbrechende Schichten zur weiteren Unterdrückung von Licht aus dem violetten und blauen Spektralbereich auf. Durch diese Maßnahmen wird gewährleistet, daß die erfindungsgemäße Glühlampe im wesentlichen rotes Licht emittiert und für die Verwendung als Bremslichtlampe oder Schlußlichtlampe eines Fahrzeugs geeignet ist.The light bulb according to the invention is essentially translucent rotationally symmetrical lamp vessel, one enclosed by the lamp vessel Filament and one arranged on the lamp vessel, designed as an edge filter Interference filter equipped, the interference filter optically low refractive index and optically high refractive index layers for adjusting the edge of the interference filter in the red spectral range. The layer thicknesses of the optically low refractive index and optically high refractive index layers, depending on the angle of incidence the one emitted by the incandescent filament and striking the interference filter Light, locally different. In addition, the interference filter according to the invention at least two absorber layers, each with one arranged in between optically low refractive index layer for the absorption of blue and violet light as well as additional optically low refractive and optically high refractive index Layers to further suppress light from the violet and blue spectral range. These measures ensure that the Incandescent lamp according to the invention essentially emits red light and for use is suitable as a brake light lamp or tail light lamp of a vehicle.

Vorteilhafterweise besteht das Interferenzfilter aus mindestens vier Stapeln von Schichten wobei der erste Stapel unmittelbar auf dem Lampengefäß angeordnet ist und die mindestens zwei Absorberschichten mit jeweils einer dazwischen angeordneten optisch niedrigbrechenden Zwischenschicht zur Absorption von blauem und violettem Licht enthält, und wobei mindestens einer der nachfolgenden Stapel die zusätzlichen optisch niedrigbrechenden und optisch hochbrechenden Schichten enthält, deren Schichtdicken derart optimiert sind, daß dieser mindestens eine Stapel eine geringe Transmission für Licht aus dem violetten und blauen Spektralbereich und eine hohe Transmission für Licht aus dem roten Spektralbereich besitzt, und wobei die anderen Stapel die optisch niedrigbrechenden und optisch hochbrechenden Schichten zur Einstellung der Kante des Interferenzfilters im roten Spektralbereich enthalten. Die Schichtdicken der optisch niedrigbrechenden und optisch hochbrechenden Schichten dieser Stapel sind derart optimiert, daß die Kante des Interferenzfilters in dem Wellenlängenbereich von 580 nm bis 600 nm liegt. Auf diese Weise kann ein Interferenzfilter mit vergleichsweise wenigen Schichten hergestellt werden, das im Wellenlängenbereich von 580 nm bis 600 nm einen steilen Übergang von dem Spektralbereich geringer Transmission zu dem Spektralbereich hoher Transmission besitzt.The interference filter advantageously consists of at least four stacks of Layers wherein the first stack is arranged directly on the lamp vessel and the at least two absorber layers, each with one in between optically low refractive index layer for the absorption of blue and contains violet light, and wherein at least one of the subsequent stacks the contains additional optically low-refractive and optically high-refractive layers, whose layer thicknesses are optimized so that this at least one stack a low transmission for light from the violet and blue spectral range and has a high transmission for light from the red spectral range, and the other stacks being optically low refractive and optically high refractive Layers for setting the edge of the interference filter in the red spectral range contain. The layer thicknesses of the optically low refractive index and optically high refractive index Layers of these stacks are optimized so that the edge of the interference filter is in the wavelength range from 580 nm to 600 nm. In this way an interference filter with comparatively few layers can be produced, which in the wavelength range from 580 nm to 600 nm has a steep transition from the spectral range of low transmission to the spectral range of high transmission owns.

Der erste Stapel enthält vorteilhafterweise mindestens zwei Absorberschichten aus Eisenoxid Fe2O3 mit jeweils einer dazwischen angeordneten, optisch niedrigbrechenden Schicht. Eisenoxid ist ein Material mit einem vergleichsweise hohen optischen Brechungsindex. Die Eisenoxidschichten besitzen bei ausreichend dünner Schichtdicke im violetten und blauen Spektralbereich metallische Eigenschaften und im roten Spektralbereich dielektrische Eigenschaften. Mit der jeweiligen optisch niedrigbrechenden Zwischenschicht wird durch Anpassung und Optimierung ihrer Schichtdicke der Interferenzeffekt in Kombination mit den optisch hochbrechenden Eisenoxidschichten ausgenutzt, um eine hohe Transmission des ersten Stapels für Licht aus dem roten Spektralbereich und eine hohe Reflexion des ersten Stapels für Licht aus dem blauen Spektralbereich zu erreichen.The first stack advantageously contains at least two absorber layers made of iron oxide Fe 2 O 3 , each with an optically low-refractive layer arranged between them. Iron oxide is a material with a comparatively high optical refractive index. With a sufficiently thin layer thickness, the iron oxide layers have metallic properties in the violet and blue spectral range and dielectric properties in the red spectral range. With the respective optically low-refractive intermediate layer, the interference effect in combination with the optically high-refractive iron oxide layers is used by adapting and optimizing their layer thickness in order to ensure high transmission of the first stack for light from the red spectral range and high reflection of the first stack for light from the blue spectral range to reach.

III. Beschreibung des bevorzugten Ausführungsbeispiels III. Description of the preferred embodiment

Nachstehend wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
Eine Seitenansicht einer Glühlampe gemäß des bevorzugten Ausführungsbeispiels der Erfindung
Figur 2
Einen vergrößerten Ausschnitt des Lampengefäßes der in Figur 1 abgebildeten Glühlampe in geschnittener, schematischer Darstellung
Figur 3
Transmissionskurven des Interferenzfilters und der einzelnen Stapel des Interferenzfilters der Glühlampe gemäß des bevorzugten Ausführungsbeispiels
The invention is explained in more detail below on the basis of a preferred exemplary embodiment. Show it:
Figure 1
A side view of an incandescent lamp according to the preferred embodiment of the invention
Figure 2
An enlarged section of the lamp vessel of the incandescent lamp shown in Figure 1 in a sectional, schematic representation
Figure 3
Transmission curves of the interference filter and the individual stacks of the interference filter of the incandescent lamp according to the preferred embodiment

Bei dem bevorzugten Ausführungsbeispiel der Erfindung handelt es sich um eine Glühlampe mit einer elektrischen Leistungsaufnahme von ca. 25 W, die beispielsweise als Lichtquelle in der Heckleuchte zur Erzeugung des Schlußlichts oder Bremslichts verwendbar ist. Diese Glühlampe besitzt einen bajonettartigen Lampensockel 10 und ein um die Lampenachse A-A rotationssymmetrisches, birnenförmiges Lampengefäß 20 aus Glas, das eine Glühwendel (nicht abgebildet) umschließt. Die äußere Oberfläche des Lampengefäßes 20 ist mit einem Interferenzfilter 30 beschichtet, das für rotes Licht eine hohe Transmision besitzt und für Licht anderer Spektralbereiche nahezu undurchlässig ist. Die Schichtdicke des Interferenzfilters 30 variiert lokal in Abhängigkeit des Einfallswinkels des von der Glühwendel emittierten und auf das Interferenzfilter 30 auftreffenden Lichts. An der Kuppe des Lampengefäßes 20 besitzt das Interferenzfilter 30 die geringste Schichtdicke und in Sockelnähe die größte Schichtdicke. Die Schichtdicke des Interferenzfilters 30 nimmt stetig von der Kuppe zum Sockel zu. Der Unterschied zwischen der geringsten und der größten Schichtdicke beträgt ungefähr 7 Prozent. Entlang konzentrischer Ringe um die Lampenachse A-A ist die Schichtdicke des Interferenzfilters 30 konstant. Das Interferenzfilter 30 besteht aus insgesamt 28 Schichten, die in fünf Stapeln 31-35 angeordnet sind.The preferred embodiment of the invention is a Incandescent lamp with an electrical power consumption of approximately 25 W, for example as a light source in the rear light to generate the tail light or Brake lights can be used. This incandescent lamp has a bayonet-like lamp base 10 and a pear-shaped one which is rotationally symmetrical about the lamp axis A-A Lamp vessel 20 made of glass, which encloses a filament (not shown). The outer surface of the lamp vessel 20 is coated with an interference filter 30, that has a high transmission for red light and for light of others Spectral ranges is almost impermeable. The layer thickness of the interference filter 30 varies locally depending on the angle of incidence of the emitted by the filament and light incident on the interference filter 30. At the top of the lamp vessel 20, the interference filter 30 has the smallest layer thickness and near the base the greatest layer thickness. The layer thickness of the interference filter 30 increases steadily from the top to the base. The difference between the least and the maximum layer thickness is approximately 7 percent. Along concentric rings around the lamp axis A-A, the layer thickness of the interference filter 30 is constant. The Interference filter 30 consists of a total of 28 layers, which are in five stacks 31-35 are arranged.

Der erste Stapel 31, der unmittelbar auf dem Lampengefäß 20 angebracht ist, besteht aus einer ersten Absorberschicht aus Fe2O3 mit einer physikalischen Schichtdicke von ca. 8 nm und einer zweiten Absorberschicht aus Fe2O3 mit einer physikalischen Schichtdicke von ca. 14 nm sowie einer zwischen den beiden Absorberschichten angeordneten, optisch niedrigbrechenden Zwischenschicht aus SiO2 mit einer physikalischen Schichtdicke von ungefähr 87 nm. In Figur 3 ist das Transmissionsverhalten des ersten Stapels 31 in Abhängigkeit von der Lichtwellenlänge durch die Kurve 1 dargestellt.The first stack 31, which is attached directly to the lamp vessel 20, consists of a first absorber layer made of Fe 2 O 3 with a physical layer thickness of approximately 8 nm and a second absorber layer made of Fe 2 O 3 with a physical layer thickness of approximately 14 nm and an optically low-refractive intermediate layer made of SiO 2 arranged between the two absorber layers and having a physical layer thickness of approximately 87 nm. FIG. 3 shows curve 1 as a function of the light wavelength as a function of the light wavelength.

Der zweite Stapel 32 wird von einer einmal wiederholten Schichtenfolge gebildet, die aus einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von ungefähr 12 nm, einer optisch niedrigbrechenden Schicht aus SiO2 mit einer physikalischen Schichtdicke von ca. 40 nm und einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von 25 nm besteht. Der zweite Stapel 32 ist optional. Er bringt eine zusätzliche Reduktion der Transmission des Interferenzfilters 30 im violetten Spektralbereich. Sein Transmissionsverhalten ist in Figur 3 nicht dargestellt.The second stack 32 is formed by a layer sequence repeated once, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 12 nm, an optically low-index layer of SiO 2 with a physical layer thickness of approximately 40 nm and an optically high-index layer Layer consists of TiO 2 with a physical layer thickness of 25 nm. The second stack 32 is optional. It brings an additional reduction in the transmission of the interference filter 30 in the violet spectral range. Its transmission behavior is not shown in FIG. 3.

Der dritte Stapel 33 wird von einer zweimal wiederholten Schichtenfolge gebildet, die aus einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von ca. 14 nm, einer optisch niedrigbrechenden Schicht aus SiO2 mit einer physikalischen Schichtdicke von 77 nm und einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von ca. 14 nm besteht. Dieser dritte Stapel 33 besitzt eine geringe Transmission für Licht aus dem violetten und blauen Spektralbereich und eine hohe Transmission für Licht aus dem roten Spetralbereich. Er dient neben dem Absorptionsfilter zur weiteren Unterdrückung von violettem und blauem Licht. In Figur 3 ist das Transmissionsverhalten des dritten Stapels 33 in Abhängigkeit von der Lichtwellenlänge durch die Kurve 2 dargestellt.The third stack 33 is formed by a twice-repeated layer sequence, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 14 nm, an optically low-index layer of SiO 2 with a physical layer thickness of 77 nm and an optically high-index layer consists of TiO 2 with a physical layer thickness of approx. 14 nm. This third stack 33 has a low transmission for light from the violet and blue spectral range and a high transmission for light from the red spectral range. In addition to the absorption filter, it serves to further suppress violet and blue light. FIG. 3 shows the transmission behavior of the third stack 33 as a function of the light wavelength by curve 2.

Der vierte Stapel 34 wird von einer zweimal wiederholten Schichtenfolge gebildet, die aus einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von ungefähr 24 nm, einer optisch niedrigbrechenden Schicht aus SiO2 mit einer physikalischen Schichtdicke von 79 nm und einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von 24 nm besteht. Die Kurve 3 der Figur 3 zeigt das Transmissionsverhalten des vierten Stapels 34 in Abhängigkeit von der Lichtwellenlänge.The fourth stack 34 is formed by a twice-repeated layer sequence, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 24 nm, an optically low-index layer of SiO 2 with a physical layer thickness of 79 nm and an optically high-index layer TiO 2 with a physical layer thickness of 24 nm. The curve 3 in FIG. 3 shows the transmission behavior of the fourth stack 34 as a function of the light wavelength.

Der fünfte Stapel 35 wird von einer dreimal wiederholten Schichtenfolge gebildet, die aus einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von ca. 25 nm, einer optisch niedrigbrechenden Schicht aus SiO2 mit einer physikalischen Schichtdicke von 86 nm und einer optisch hochbrechenden Schicht aus TiO2 mit einer physikalischen Schichtdicke von 24 nm besteht. Die Kurve 4 der Figur 3 zeigt das Transmissionsverhalten des fünften Stapels 35 in Abhängigkeit von der Lichtwellenlänge. Alle Schichtdickenangaben beziehen sich auf die Kuppe des Lampengefäßes 20.The fifth stack 35 is formed by a layer sequence repeated three times, which consists of an optically high-index layer of TiO 2 with a physical layer thickness of approximately 25 nm, an optically low-index layer of SiO 2 with a physical layer thickness of 86 nm and an optically high-index layer consists of TiO 2 with a physical layer thickness of 24 nm. Curve 4 of FIG. 3 shows the transmission behavior of the fifth stack 35 as a function of the light wavelength. All layer thickness information relates to the tip of the lamp vessel 20.

Der vierte 34 und fünfte Stapel 35 dienen zur Einstellung der Kante des Interferenzfilters 30 bei ungefähr 590 nm. Die Schichtdicken der SiO2- und TiO2-Schichten dieser beiden Stapel sind derart optimiert, daß das Interferenzfilter 30 bei einer Lichtwellenlänge von ca. 590 nm einen steilen Übergang von dem kurzwelligen Spektralbereich geringer Transmission zu dem langwelligen Spektralbereich hoher Transmission besitzt. In Figur 3 ist das Transmissionsverhalten des gesamten Interferenzfilters 30 in Abhängigkeit von der Lichtwellenlänge durch die Kurve 5 dargestellt. Die fünf Stapel 31-35 folgen nahtlos aufeinander. Das Interferenzfilter 30 besitzt daher 28 Schichten.The fourth 34 and fifth stacks 35 serve to adjust the edge of the interference filter 30 at approximately 590 nm. The layer thicknesses of the SiO 2 and TiO 2 layers of these two stacks are optimized in such a way that the interference filter 30 at a light wavelength of approximately 590 nm has a steep transition from the short-wave spectral range of low transmission to the long-wave spectral range of high transmission. FIG. 3 shows the transmission behavior of the entire interference filter 30 as a function of the light wavelength by curve 5. The five stacks 31-35 follow one another seamlessly. The interference filter 30 therefore has 28 layers.

Claims (5)

Glühlampe mit einem lichtdurchlässigen, im wesentlichen rotationssymmetrischen Lampengefäß (20), einer vom Lampengefäß (20) umschlossenen Glühwendel und einem auf dem Lampengefäß (20) angeordneten, als Kantenfilter ausgebildeten Interferenzfilter (30), wobei das Interferenzfilter (30) optisch niedrigbrechende und optisch hochbrechende Schichten zur Einstellung der Kante des Interferenzfilters (30) im roten Spektralbereich aufweist, die Schichtdicken der optisch niedrigbrechenden und optisch hochbrechenden Schichten, in Abhängigkeit des Einfallswinkels des von der Glühwendel emittierten und auf das Interferenzfilter auftreffenden Lichts, lokal unterschiedlich ist, das Interferenzfilter (30) Absorberschichten zur Absorption von blauem und violettem Licht aufweist, dadurch gekennzeichnet, daß
das Interferenzfilter mindestens zwei dieser Absorberschichten mit jeweils einer dazwischen angeordneten optisch niedrigbrechenden Zwischenschicht aufweist und zusätzliche optisch niedrigbrechende und optisch hochbrechende Schichten zur weiteren Unterdrückung von Licht aus dem violetten und blauen Spektralbereich besitzt.Incandescent lamp with a translucent, essentially rotationally symmetrical lamp vessel (20), a filament enclosed by the lamp vessel (20) and an interference filter (30) arranged on the lamp vessel (20) and designed as an edge filter, wherein the interference filter (30) has optically low-refractive and optically high-refractive layers for setting the edge of the interference filter (30) in the red spectral range, the layer thicknesses of the optically low-refractive and optically high-refractive layers are locally different, depending on the angle of incidence of the light emitted by the incandescent filament and incident on the interference filter, the interference filter (30) has absorber layers for absorbing blue and violet light, characterized in that
the interference filter has at least two of these absorber layers, each with an optically low-refractive intermediate layer arranged between them and has additional optically low-refractive and optically high-refractive layers for further suppression of light from the violet and blue spectral range. Glühlampe nach Anspruch 1, dadurch gekennzeichnet, daß das Interferenzfilter aus mindestens vier Stapeln (31, 33, 34, 35) von Schichten besteht, wobei der erste Stapel (31), der unmittelbar auf dem Lampengefäß (20) angeordnet ist, die mindestens zwei Absorberschichten mit der dazwischen angeordneten, optisch niedrigbrechenden Zwischenschicht enthält, mindestens einer der nachfolgenden Stapel (33) die zusätzlichen optisch niedrigbrechenden und optisch hochbrechenden Schichten enthält, wobei deren Schichtdicken derart optimiert ist, daß dieser mindestens eine Stapel (33) eine geringe Transmission für Licht aus dem violetten und blauen Spektralbereich und eine hohe Transmission für Licht aus dem roten Spektralbereich besitzt, die anderen Stapel (34, 35) die optisch niedrigbrechenden und optisch hochbrechenden Schichten zur Einstellung der Kante des Interferenzfilters (30) im roten Spektralbereich enthalten, wobei die Schichtdicken der optisch niedrigbrechenden und optisch hochbrechenden Schichten dieser Stapel (34, 35) derart optimiert sind, daß die Kante des Interferenzfilters (30) in dem Wellenlängenbereich von 580 nm bis 600 nm liegt. Incandescent lamp according to claim 1, characterized in that the interference filter consists of at least four stacks (31, 33, 34, 35) of layers, wherein the first stack (31), which is arranged directly on the lamp vessel (20) and contains at least two absorber layers with the optically low-refractive intermediate layer arranged between them, at least one of the subsequent stacks (33) contains the additional optically low-refractive and optically high-refractive layers, their layer thicknesses being optimized in such a way that this at least one stack (33) has a low transmission for light from the violet and blue spectral range and a high transmission for light from the red spectral range, the other stacks (34, 35) contain the optically low refractive and optically high refractive layers for setting the edge of the interference filter (30) in the red spectral range, the layer thicknesses of the optically low refractive and optically high refractive layers of these stacks (34, 35) being optimized in this way, that the edge of the interference filter (30) is in the wavelength range from 580 nm to 600 nm. Glühlampe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die mindestens zwei Absorberschichten aus Eisenoxid bestehen und die Schichtdicken der mindestens zwei Absorberschichten so optimiert sind, daß die Absorberschichten im violetten und blauen Spektralbereich metallische Eigenschaften und im roten Spektralbereich dielektrische Eigenschaften besitzen, und wobei die Schichtdicke der jeweiligen Zwischenschicht derart optimiert und auf die Schichtdicken der mindestens zwei Absorberschichten abgestimmt ist, daß die jeweilige Zwischenschicht und die mindestens zwei Absorberschichten eine hohe Transmission im roten Spektralbereich besitzen.Incandescent lamp according to Claim 1 or 2, characterized in that the at least two absorber layers consist of iron oxide and the layer thicknesses of the at least two absorber layers are optimized so that the absorber layers have metallic properties in the violet and blue spectral range and dielectric properties in the red spectral range, and the Layer thickness of the respective intermediate layer is optimized in such a way and is matched to the layer thicknesses of the at least two absorber layers that the respective intermediate layer and the at least two absorber layers have a high transmission in the red spectral range. Fahrzeugleuchte mit einer Glühlampe nach Anspruch 1, 2 oder 3.Vehicle lamp with an incandescent lamp according to claim 1, 2 or 3. Verwendung einer Glühlampe nach Anspruch 1, 2 oder 3 als Schlußlicht- oder Bremslichtlampe.Use of an incandescent lamp according to claim 1, 2 or 3 as tail light or brake light lamp.
EP01108874A 2000-05-17 2001-04-09 Incandescent lamp Expired - Lifetime EP1156514B1 (en)

Applications Claiming Priority (2)

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DE10023936A DE10023936C2 (en) 2000-05-17 2000-05-17 Incandescent lamp, vehicle lamp with an incandescent lamp and use of an incandescent lamp
DE10023936 2000-05-17

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EP1156514A1 true EP1156514A1 (en) 2001-11-21
EP1156514B1 EP1156514B1 (en) 2010-12-22

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US (1) US6661164B2 (en)
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AT (1) ATE492903T1 (en)
BR (1) BR0102002A (en)
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DE (2) DE10023936C2 (en)

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US7176606B2 (en) 2003-05-07 2007-02-13 Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh Lamp that emits colored light
DE102007009013A1 (en) 2007-02-23 2008-08-28 Osram Gesellschaft mit beschränkter Haftung Reflector has retroreflector and filter unit upstream of retroreflector, which is permeable to light within certain wavelength area and is non-permeable to light of other wavelength area

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Also Published As

Publication number Publication date
EP1156514B1 (en) 2010-12-22
US6661164B2 (en) 2003-12-09
US20010043033A1 (en) 2001-11-22
CA2347603A1 (en) 2001-11-17
DE50115746D1 (en) 2011-02-03
ATE492903T1 (en) 2011-01-15
DE10023936C2 (en) 2002-06-06
BR0102002A (en) 2001-12-26
DE10023936A1 (en) 2001-11-29

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