WO2009050064A1 - Système stratifié combinant un filtre de conversion et un revêtement réfléchissant les infrarouges - Google Patents

Système stratifié combinant un filtre de conversion et un revêtement réfléchissant les infrarouges Download PDF

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Publication number
WO2009050064A1
WO2009050064A1 PCT/EP2008/063377 EP2008063377W WO2009050064A1 WO 2009050064 A1 WO2009050064 A1 WO 2009050064A1 EP 2008063377 W EP2008063377 W EP 2008063377W WO 2009050064 A1 WO2009050064 A1 WO 2009050064A1
Authority
WO
WIPO (PCT)
Prior art keywords
incandescent lamp
interference filter
layer
layers
optically
Prior art date
Application number
PCT/EP2008/063377
Other languages
German (de)
English (en)
Inventor
Manfred Bühler
Markus Hessler
Sigbert Müller
Reinhard Schäfer
Original Assignee
Osram Gesellschaft mit beschränkter Haftung
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 Osram Gesellschaft mit beschränkter Haftung filed Critical Osram Gesellschaft mit beschränkter Haftung
Publication of WO2009050064A1 publication Critical patent/WO2009050064A1/fr

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Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/281—Interference filters designed for the infrared light
    • G02B5/282—Interference filters designed for the infrared light reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films

Definitions

  • the invention relates to an incandescent lamp, in particular Halo ⁇ genglühlampe with a translucent lamp vessel and an arranged on the lamp vessel interference filter having a plurality of optically low refractive layers and a plurality of optically high refractive layers, which are arranged alternately.
  • incandescent lamps in particular halogen incandescent lamps, are known, which have an interference filter which reflects infrared radiation in order to increase efficiency or save energy.
  • interference filter having an alternating sequence of layers of two or more materials having different refractive indices are used which are adapted to the infrared radiation emitted from a filament to reflect to ⁇ back in the direction of the filament, while visible light Transmit is advantage. Reflecting the infrared radiation and associated heat transfer reduces the amount of electrical energy required to maintain the operating temperature of the filament.
  • absorption or interference filters which detect a change in the emitted color temperature which results from the spiral geometry. Means and the supplied electrical energy results, converted to move the output of the bulb Farbtem ⁇ temperature in the direction of the desired color locus.
  • Object of the present invention is therefore to provide an effi- zienzge felicite incandescent lamp with a color temperature setting ⁇ defined temperature which is inexpensively and in a layer system.
  • This object is achieved by an incandescent lamp, insbeson ⁇ particular a halogen incandescent lamp, having a light-transmitting lamp vessel and, disposed on the lamp vessel interference filter having an alternating sequence of a plurality of optically low refractive index layers and optically highly refractive layers.
  • Is taken into account in the formation of the interference layer designs a color temperature conversion in the visual range and a high reflectivity in the near infrared range and optimized, so an interference filter can be provided ⁇ having both a color conversion, as also having infrared reflectivity.
  • the interference layer design consists of alternately op ⁇ table high refractive and optically low refractive layer sequences, the desired filter properties by the number of layer sequences and the individual layer thicknesses is achieved. Particularly advantageous is the use of Nb 2 O 5 as a high refractive layer material and SiO 2 as a low refractive layer material. However, it is also possible to use alternative materials such as titanium oxide TiO 2 , or HfO 2 as high refractive index materials or ZrO 2 or Al 2 O 3 as low refractive index materials.
  • Layer thickness for the materials Nb 2 O 5 and SiO 2 was calculated. If alternative materials, as described above, are used, the physical layer thickness can be conversely, the change ratio of the refractive indices are converted so that the optical layer thicknesses remain constant.
  • a second particularly preferred embodiment of ⁇ fenbart a layer sequence that provides a conversion yellow in the color direction, for example, to deliver warm ⁇ white light.
  • a particularly preferred exemplary embodiment of the layer sequence is angege ⁇ ben in Table 2 below.
  • the interference filter according to the invention consists of only 34 layer sequences, while a standard IRC coating having between 30 and 60 layer sequences and a color conversion cover plate coating has 6 to 12 layer sequences.
  • the letter L behind the layer thickness information in Tables 1 and 2 stands for optically low-refractive layer and the letter H behind the Schichtdi ⁇ ckenan composite in Tables 1 and 2 stands for optically high-refractive layer.
  • a halogen incandescent lamp with an ellipsoidal lamp vessel in the focal point of the filament is arranged. Since ⁇ by there is an optimal influence on the incandescent filament, since all reflected infrared components of the emitted light are reflected directly back to the filament, so that the amount of electrical energy required to maintain ⁇ the operating temperature of the filament can be reduced.
  • the incandescent filament is arranged generally in the middle of the lamp vessel, so that as much reflected infrared light as possible can be absorbed by the incandescent filament.
  • FIG. 1 shows a graph of transmission curves of the color-conversion interference coatings according to the invention compared to a standard IRC coating for the wavelength range between 300 nm and 2200 nm
  • FIG. 1 shows a graph of transmission curves of the color-conversion interference coatings according to the invention compared to a standard IRC coating for the wavelength range between 300 nm and 2200 nm
  • FIG. 2 is a graph of the transmission curves of the interference coating of the invention with color conversion compared to the standard IRC coating, and conventional color conversion coatings (blue, yellow) in the range of
  • FIG. 1 shows a comparison of the transmission curves of the coatings according to the invention with color conversion in the blue color direction (see graph 2), with yellow color conversion (see graph 4), compared with a conventional standard IRC coating (see graph 6) Wavelength range between 300 nm and 2200 nm.
  • the course of IRC coating and coatings according to the invention is very similar in the visual and near-infrared range.
  • a comparison of the coatings shows that the reflection of the layers according to the invention in the near-infrared region is similar pronounced lent, as in the standard IRC coating (see range between 800 to 1300 nm).
  • the high transmission rate in the visible range ⁇ abruptly at the transition to is also near- infrared range is reduced, so that the infrared heat radiation can be used to heat the filament.
  • the deviations in the transmission curve of the coatings 2, 4 according to the invention from the standard IRC coating in the visual range can be attributed to the transmission of the desired wavelengths in order to provide the color conversion.
  • the graphs 8 and 10 show the transmission curves of two conventional color conversion coatings in the color direction blue with a color temperature of 3700 Kelvin and 4300 Kelvin, while the graph 12 shows the transmission curve of a color conversion of a conventional coating in the color direction yellow.
  • the transmission curves 2, 4 of the coating according to the invention show behavior analogous to the transmission curves 8, 10 and 12 of the conventional coatings.
  • an incandescent lamp in particular Halogenglüh ⁇ lamp with a translucent lamp vessel and an arranged on the lamp vessel interference filter that an alternating sequence of a variety of optically low-refractive layers and optically high-refractive layer has, wherein the interference filter has a layer ⁇ design, which provides a combination of IRC layer ⁇ design and color conversion layer design.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)

Abstract

L'invention concerne une lampe à incandescence, notamment une lampe à incandescence halogène comportant une ampoule laissant passer la lumière ainsi qu'un filtre d'interférences placé sur l'ampoule et présentant une succession alternée de couches à faible réfraction optique et de couches à forte réfraction optique. Le filtre d'interférences présente une structure stratifiée qui combine une structure stratifiée de revêtements réfléchissant les infrarouges et de couches de conversion de couleurs.
PCT/EP2008/063377 2007-10-16 2008-10-07 Système stratifié combinant un filtre de conversion et un revêtement réfléchissant les infrarouges WO2009050064A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007049569.4 2007-10-16
DE200710049569 DE102007049569A1 (de) 2007-10-16 2007-10-16 Kombiniertes Schichtsystem IRC- und Farbkonversionsfilter

Publications (1)

Publication Number Publication Date
WO2009050064A1 true WO2009050064A1 (fr) 2009-04-23

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Application Number Title Priority Date Filing Date
PCT/EP2008/063377 WO2009050064A1 (fr) 2007-10-16 2008-10-07 Système stratifié combinant un filtre de conversion et un revêtement réfléchissant les infrarouges

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Country Link
DE (1) DE102007049569A1 (fr)
WO (1) WO2009050064A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130058096A1 (en) * 2011-09-01 2013-03-07 Peter W. Brown Optical low index alumina film for lighting applications

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538996A1 (de) * 1985-11-02 1987-05-14 Philips Patentverwaltung Interferenzfilter
EP0409554A2 (fr) * 1989-07-19 1991-01-23 General Electric Company Revêtements optiques interférentiels et lampes utilisant de tels revêtements
GB2272569A (en) * 1992-11-12 1994-05-18 Gen Electric Tungsten-halogen incandescent lamp
DE102006013142A1 (de) * 2006-03-20 2007-09-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kombiniertes optisches Filtersystem für eine NIR-Lampe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6049169A (en) 1998-04-08 2000-04-11 Philips Electronics North America Corp. Electric lamp having optical interference filter of alternating layers of SiO2 and Nb2 O5 --Ta2 O5

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538996A1 (de) * 1985-11-02 1987-05-14 Philips Patentverwaltung Interferenzfilter
EP0409554A2 (fr) * 1989-07-19 1991-01-23 General Electric Company Revêtements optiques interférentiels et lampes utilisant de tels revêtements
GB2272569A (en) * 1992-11-12 1994-05-18 Gen Electric Tungsten-halogen incandescent lamp
DE102006013142A1 (de) * 2006-03-20 2007-09-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kombiniertes optisches Filtersystem für eine NIR-Lampe

Also Published As

Publication number Publication date
DE102007049569A1 (de) 2009-04-23

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