WO1996005609A1 - Lampe a micro-ondes - Google Patents

Lampe a micro-ondes Download PDF

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Publication number
WO1996005609A1
WO1996005609A1 PCT/EP1995/003133 EP9503133W WO9605609A1 WO 1996005609 A1 WO1996005609 A1 WO 1996005609A1 EP 9503133 W EP9503133 W EP 9503133W WO 9605609 A1 WO9605609 A1 WO 9605609A1
Authority
WO
WIPO (PCT)
Prior art keywords
microwave
radiation
lamp
burner
reflector
Prior art date
Application number
PCT/EP1995/003133
Other languages
German (de)
English (en)
Inventor
Janusz Teklak
Ingo Susemihl
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP95929809A priority Critical patent/EP0722617B1/fr
Priority to DE59501128T priority patent/DE59501128D1/de
Publication of WO1996005609A1 publication Critical patent/WO1996005609A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the invention relates to a microwave lamp according to the preamble of claim 1.
  • a microwave lamp of this type is known from publications, e.g. B. from "The Washington Post", October 26, 1994, p. A3.
  • microwave energy generated by a microwave generator is used to excite a mixture of an inert gas and sulfur particles enclosed in a quartz glass ball for plasma formation.
  • this plasma emits radiation which, in the visible region of the spectrum, has a spectral distribution close to that of sunlight, a first property of this type of lamp which is essential for lighting applications.
  • Another of its advantageous properties is that, because of the type of energy conversion from electromagnetic radiation into visible radiation, no electrodes are required in the illuminant, the failure of which in the case of incandescent or fluorescent lamps is known to be one of the causes of a limited service life.
  • the advantage of this type of lamp is the high efficiency with which the energy supplied to the microwave generator is converted into visible radiation.
  • This property means that a microwave lamp forms a radiation-intensive light source, which is also used in particular as a light source for high-performance lights, eg. B. is suitable for spotlights or headlights.
  • the microwave resonator is therefore mechanically sensitive. Changes in shape caused by mechanical action can, however, change its resonator property. In addition, a contactor must also be ensured so that no microwave energy can be emitted as scattered radiation from the resonator chamber.
  • a piston made of a transparent material must therefore be arranged around the microwave resonator, similar to an incandescent lamp.
  • the present invention is therefore based on the object of further developing a microwave lamp of the type mentioned at the outset with simple means in such a way that it can also be used more flexibly and more flexibly than previously possible for lights with narrowly concentrated light emission.
  • this object is achieved according to the invention with the features described in the characterizing part of patent claim 1.
  • the microwave lamp essentially has the rotationally symmetrical light distribution of a point light source, apart from scatter radiation caused by the microwave generator, but in particular also the microwave resonator.
  • the reflector arrangement surrounding the burner forms an element that does not disturb the propagation of the microwaves, but instead reflects radiation in the visible range of the electromagnetic spectrum, and thus bundles this visible radiation transverse to the lamp symmetry axis. If, according to one of the developments of the invention, this reflector arrangement is designed to be rotationally symmetrical with respect to the lamp symmetry axis, then such a reflector arrangement results - in a plane containing the lamp symmetry axis - in a mirror-image symmetrical, butterfly-like light distribution characteristic with respect to this axis.
  • this radiation characteristic is of indisputable advantage because it enables this property to be used to equip luminaires without excessive scattered radiation
  • Favorable geometrical dimensions have a narrowly radiating, concentrated light emission, without the need for a great deal of optical aids in the luminaire itself in order to achieve the desired light distribution characteristic.
  • the solution according to the invention can be implemented using conventional means which are completely mastered in light and microwave technology.
  • Metallic mirror materials usually used predominantly in lighting technology cannot, of course, be used for this reflector arrangement. They would, at least in part inside the Microwave resonator arranged, overheated during lamp operation, thereby destroyed and probably also affecting the microwave resonator itself. This is different with materials such as quartz glass or mica with suitable dielectric layers. As is known per se, these are insensitive to radiation in the microwave range, but can be arranged relative to the burner of the microwave lamp and configured geometrically such that they act as mirror surfaces with respect to the optical radiation emitted by the burner.
  • FIG. 1 shows schematically the construction of a microwave lamp in a known embodiment in connection with a luminaire reflector
  • FIG. 2 shows a microwave lamp designed according to the invention, in which, in comparison to the embodiment according to FIG. 1, a reflector arrangement is additionally integrated in the lamp,
  • FIG. 3 shows a light distribution characteristic of the microwave lamp according to FIGS. 2 and
  • FIGS. 4 to 7 each show an example of different configurations of the reflector arrangement integrated in the microwave lamp and their practical applications in luminaires with different light emission characteristics.
  • a lamp reflector 1 with reflector shells 11, 12 is shown schematically in broken lines in FIG. 1, which are arranged in mirror image symmetry to an axis of symmetry 2, in many cases this lamp reflector 1 is rotationally symmetrical. Its outer edge forms the light outlet opening 3 of the lamp.
  • the known embodiment of a microwave lamp 5 is used in this lamp reflector 1, which is shown for reasons of clarity.
  • Radiation energy in the microwave range is generated in a microwave generator 50, which is fed by AC mains voltage, and is radiated into the interior of a microwave resonator 51.
  • a resonance oscillation in the form of a standing wave is formed with the aid of this microwave resonator 51, so that the radiation energy can be optimally used.
  • a burner 52 is arranged, which is preferably spherical and encloses a cavity in which an inert gas, e.g. B. argon mixed with portions of a material which emits visible radiation in the excited state, is included.
  • an inert gas e.g. B. argon mixed with portions of a material which emits visible radiation in the excited state
  • this material is pure sulfur. With this mixture of materials, it has been found in the known microwave lamp 5 that a plasma forms in the cavity of the burner 52 under the effect of the microwave radiation, the radiation spectrum of which correlates well with the radiation sensitivity of the human eye. This means that the light emitted by this light source appears very natural to humans.
  • the microwave resonator 51 must fulfill a double function in the application of the microwave lamp 5. He must concentrate the microwave radiation on the burner 52 in such a way that the required plasma is formed inside it with a high degree of efficiency, ie the microwave resonator 51 must be impermeable to microwave radiation. On the other hand, however, it should transmit the visible radiation emitted in its interior by the burner 52 as freely as possible to the outside. For this reason, it consists of a filigree metal wire cage which is correspondingly sensitive to mechanical influences. For this reason and also for reasons of radiation safety, protection against accidental contact is required, which, similar to an incandescent lamp, consists of an optically translucent lamp bulb 53.
  • This system-related construction of a microwave lamp is relatively voluminous compared to other conventional high-performance lamps, primarily because of the geometric dimensions of the microwave resonator 51, although the light source itself, ie. H. the burner 52 is quite concentrated.
  • the consequence of this is that, regardless of the individual design of the luminaire reflector 1, its parts near the lamp cannot be brought so directly to the burner 52 emitting the light radiation in order to use the light-directing properties alone the luminaire reflector 1 or its reflector surfaces 11 or 12 to achieve a luminaire with a narrowly focused light distribution characteristic. In FIG. 1, this is indicated by the large radiation angle ⁇ , which is thus geometrically determined.
  • the microwave lamp 5 which is also particularly suitable for applications in the case of spotlights or headlights, ie. H. luminaires with an extremely concentrated light distribution are suitable.
  • suitable light-directing means that is to say reflectors of a luminaire, cannot be brought close enough to the burner 52 of the microwave lamp 5 which is essentially to be regarded as a point light source.
  • additional light-directing means such as lenses or diaphragms, must therefore be used in the known structure of the microwave lamp 5, which increases the flexibility for the use of a microwave lamp in a wide spectrum of luminaires restricted.
  • FIG. 2 shows another embodiment of a microwave lamp 5 with which these disadvantages are eliminated.
  • a lamp reflector in this figure
  • FIG. 2 shows only to the microwave lamp 5 itself.
  • the structure of the microwave lamp 5 initially corresponds to the embodiment described with reference to FIG. 1.
  • Corresponding elements are therefore also designated with the same reference symbols. They therefore do not need to be repeated here either.
  • a reflector arrangement 4 is additionally provided directly near the burner 52 and consists of mirror surfaces 41, 42 which are on both sides of a focal plane 43 are arranged.
  • This focal plane 43 cuts through the burner 52 centrally and lies vertically and transversely to the axis of symmetry 2 of the lamp.
  • the mirror surfaces 41 and 42 are designed in the contour as conical cutting lines, but could also have other contours as long as they open out in a funnel shape.
  • the mirror surfaces 41, 42 can be fixed together with the burner 52 in the interior of the resonator chamber. It is also essential that the material from which they are made is selected with regard to their function.
  • the mirror surfaces 41, 42 should absorb as little energy as possible in the area of the microwave radiation. In addition, they should affect the wave propagation of the microwave radiation in the interior of the microwave resonator 51 as little as possible, and their degree of transmission in this area of the radiation spectrum should therefore be as high as possible. On the other hand, however, their degree of reflection should also be as high as possible in the range of visible radiation so that they can be used as light-directing means. Materials that meet these requirements include quartz glass or mica with corresponding dielectric properties.
  • This reflector arrangement 4, which is fixed near the burner 52, is therefore preferably located in the interior of the microwave resonator 51 and is therefore integrated into the microwave lamp 5 itself. As shown in FIG.
  • the bundling of the radiation emitted by the burner 52 enables a relatively simple light control at the light reflector 1.
  • the light reflector 1 can be designed with all its flexibility with regard to its light-directing function in such a way that all the light emitted by a light is maximal two reflections is emitted.
  • the microwave lamp 5 in which such a reflector arrangement 4 is integrated, it is therefore of only minor importance that the microwave lamp 5 as such and due to the technology used, in its overall dimensions in relation to that The size of the burner 52 is relatively voluminous. This eliminates a major obstacle that previously prevented the use of a microwave lamp in a wide range of applications.
  • a microwave lamp 5 of the type described above can be designed particularly expediently and can also be used with different types of luminaires. Since in these examples above all the different light distributions of luminaires to be achieved with the aid of the reflector arrangement 4 in combination with luminaire reflectors 1 or their reflector surfaces 11, 12 are to be demonstrated, the microwave lamp 5 itself is no longer shown completely in the following figures. but just to clarify it as almost punctiform light source shown burner in connection with the surrounding reflector arrangement 4. In order to clarify the lighting principle, these representations do not use scale scales, but the person skilled in the art knows how to choose the appropriate lighting parameters in the individual application using his lighting technology knowledge in order to optimize the lighting shapes to solve his individual problems Task to arrive.
  • the lamp shown schematically in FIG. 4 in a cross section has a lamp reflector 1 with reflector shells 11 and 12, the outer edges of which delimit the light exit opening 3 in a plane perpendicular to the axis of symmetry 2.
  • the burner 52 and the reflector arrangement 4 of the microwave lamp are shown in a simplified manner.
  • the mirror surfaces 41 and 42 of this reflector arrangement 4 are also formed in this example in the contour as conic section lines. In this embodiment, these are mutually penetrating parabolas, the penetration points of which lie in the axis of symmetry 2, the center of the burner 52 being arranged at the focal point of these parabolas.
  • a double arrow 6 indicates schematically that the microwave lamp 5 — here the reflector arrangement 4 — together with the burner 52 can be arranged displaceably along the axis of symmetry 2 with respect to the lamp reflector 1.
  • the microwave lamp 5 here the reflector arrangement 4 — together with the burner 52 can be arranged displaceably along the axis of symmetry 2 with respect to the lamp reflector 1.
  • various light beams 71 and 72 are shown in FIG. 4 by way of example.
  • the light rays 71 these are light rays of the first type, namely light rays that emanate from the
  • Burner 52 starting directly from the lamp reflector 1, in the example the reflector shell 11, and from there emerge from the luminaire after only one reflection through the light exit opening 3.
  • the light beams 72 represent light beams of the second type which - in relation to the focal plane 43 - emerge from the burner 52 at higher beam angles. These light beams are initially simply reflected on one of the mirror surfaces 41 or 42 of the reflector arrangement 4 and only then strike the lamp reflector 1, here the reflector shell 12, so that after a total of two reflections through the light exit opening 3 of the reflector assembly 12 Exit lamp.
  • the beam path illustrate that the light emerging from the burner 52 is preferably deflected in a direction transverse to the axis of symmetry 2 by the funnel-shaped configuration of the reflector arrangement 4, wherein it is reflected a maximum of once before striking the lamp reflector 1 .
  • all the light emitted by the burner 52 is reflected at most twice before it passes through the light exit opening 3.
  • the cross-sectional shape of the mirror surfaces 41 and 42 of the reflector arrangement 4 created by the penetration of the parabolas ensures that no light can be reflected back into the burner 52 itself.
  • FIG. 5 uses a further example to explain the design options that can be achieved with this design principle of a microwave lamp 5.
  • identical or comparable elements are again identified by the same reference numerals, so that repetitions of the description can be avoided.
  • the contours of the mirror surfaces 41 and 42 of the reflector arrangement 4 are designed as interpenetrating ellipses, the interpenetration points of these conic sections also lying on the axis of symmetry 2 here.
  • the two reflector shells 11 are here or 12 of the lamp reflector 1 pulled apart a little further.
  • This luminaire shape results in a rather narrow light distribution characteristic and is relatively flatter than the luminaire shape according to FIG. 4.
  • FIG. 6 A further possible embodiment is shown in FIG. 6.
  • This example is intended to demonstrate that there are further design options available for the mirror surfaces 41 and 42 of the reflector arrangement 4 of the microwave lamp 5, while maintaining the lighting principle.
  • the mirror surfaces 41, 42 of the reflector arrangement 4 are of mirror-symmetrical design with respect to the focal plane 43, whereas the mirror surfaces 41 and 42 according to the embodiment of FIG. 6 each have a completely different contour. Only the symmetry of the reflector arrangement 4 with respect to the axis of symmetry 2 and the symmetry of the luminaire reflector 1 with respect to this axis are retained.
  • FIG. 7 shows the embodiment described with reference to FIG. 6 again.
  • the two representations of FIGS. 6 and 7 are intended to show, in comparison to one another, how the distribution of the light emitted through the light exit opening 3 changes when the position of the light emitted by the reflector arrangement 4 and the burner 52 is schematically illustrated.
  • striated microwave lamp 5 changes by a longitudinal movement in the direction of the axis of symmetry 2.
  • the reflector arrangement 4 together with the burner 52 is shown drawn deeper into the lamp reflector 1, ie it is at a greater distance from the light exit surface 3 with respect to the same lamp reflector 1.
  • the radiation characteristic of the luminaire changes due to the conical contour of the reflector shells 11 and 12 of the luminaire reflector 1. While according to FIG. 6 there is a more broadly radiating characteristic, the radiation characteristic is according to the arrangement Figure 7 preferably narrow beam.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

Une lampe à micro-ondes (5) comprend un générateur de micro-ondes (50) qui génère un rayonnement à micro-ondes, un résonateur (51) à micro-ondes constitué d'une cage en fils métalliques qui focalise le rayonnement à micro-ondes, et un brûleur (52) confiné dans le résonateur à micro-ondes (51), rempli d'un gaz inerte tel que l'argon ainsi que d'un élément qui émet un rayonnement visible lorsqu'il est excité, par exemple le soufre. Un agencement réflecteur (4) qui réfléchit le rayonnement visible mais transmet le rayonnement à micro-ondes entoure le brûleur (52) et s'étend du brûleur (52) vers l'extérieur perpendiculairement et transversalement à l'axe de symétrie (2) de la lampe à micro-ondes (5). Cet agencement réflecteur (4) sert à pré-collimater le rayonnement optique émis par le brûleur (52) dans une direction perpendiculaire à l'axe de symétrie (2). Lorsqu'une lampe à micro-ondes (5) équipée de cet agencement réflecteur (4) est associée à un dispositif d'éclairage correspondant, on peut obtenir différentes caractéristiques de rayonnement lumineux, notamment des rayonnements étroitement focalisés, avec un réflecteur ayant des dimensions géométriques avantageuses.
PCT/EP1995/003133 1994-08-09 1995-08-07 Lampe a micro-ondes WO1996005609A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95929809A EP0722617B1 (fr) 1994-08-09 1995-08-07 Lampe a micro-ondes
DE59501128T DE59501128D1 (de) 1994-08-09 1995-08-07 Mikrowellenlampe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP94112443.0 1994-08-09
EP94112443A EP0696705B1 (fr) 1994-08-09 1994-08-09 Dispositif d'éclairage indirect

Publications (1)

Publication Number Publication Date
WO1996005609A1 true WO1996005609A1 (fr) 1996-02-22

Family

ID=8216189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003133 WO1996005609A1 (fr) 1994-08-09 1995-08-07 Lampe a micro-ondes

Country Status (4)

Country Link
EP (2) EP0696705B1 (fr)
AT (2) ATE144606T1 (fr)
DE (2) DE59400919D1 (fr)
WO (1) WO1996005609A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011090136A1 (de) * 2011-12-29 2013-07-04 Trilux Gmbh & Co. Kg LED-Leuchte

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262711B1 (fr) 2001-06-01 2008-09-24 Siteco Beleuchtungstechnik GmbH Luminaire et luminaire avec un boîtier supplémentaire
AU2003209844B2 (en) * 2002-03-20 2007-07-19 Christopher Alan Haines A lighting fixture including two reflectors
AUPS119302A0 (en) * 2002-03-20 2002-04-18 Haines, Christopher Alan A lighting fixture including two reflectors
IT1396316B1 (it) * 2009-10-06 2012-11-16 Giovine Di Proiettore ad ampia diffusione con sorgenti leds precollimate.
CN105202416A (zh) * 2015-09-24 2015-12-30 广东生迪科技有限公司 一种可调角度的轨道灯

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH190264A (de) * 1936-09-25 1937-04-15 H Frauenfelder Johann Beleuchtungskörper für indirekte, blendungsfreie Raumbeleuchtung.
JPS62105355A (ja) * 1985-10-31 1987-05-15 Mitsubishi Electric Corp マイクロ波放電光源装置
DE3807584A1 (de) * 1988-03-08 1989-09-21 Stierlen Maquet Ag Operationsleuchte
DE4400199A1 (de) * 1993-01-13 1994-07-14 Fusion Systems Corp Reflektor zur Rückgewinnung von Licht in einer reflektorlosen, mikrowellengespeisten Lampe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH190264A (de) * 1936-09-25 1937-04-15 H Frauenfelder Johann Beleuchtungskörper für indirekte, blendungsfreie Raumbeleuchtung.
JPS62105355A (ja) * 1985-10-31 1987-05-15 Mitsubishi Electric Corp マイクロ波放電光源装置
DE3807584A1 (de) * 1988-03-08 1989-09-21 Stierlen Maquet Ag Operationsleuchte
DE4400199A1 (de) * 1993-01-13 1994-07-14 Fusion Systems Corp Reflektor zur Rückgewinnung von Licht in einer reflektorlosen, mikrowellengespeisten Lampe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 312 (E - 548) 12 October 1987 (1987-10-12) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011090136A1 (de) * 2011-12-29 2013-07-04 Trilux Gmbh & Co. Kg LED-Leuchte
DE102011090136B4 (de) * 2011-12-29 2013-07-25 Trilux Gmbh & Co. Kg LED-Leuchte

Also Published As

Publication number Publication date
EP0722617B1 (fr) 1997-12-17
EP0696705B1 (fr) 1996-10-23
EP0722617A1 (fr) 1996-07-24
DE59501128D1 (de) 1998-01-29
EP0696705A1 (fr) 1996-02-14
DE59400919D1 (de) 1996-11-28
ATE161359T1 (de) 1998-01-15
ATE144606T1 (de) 1996-11-15

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