EP1112458B1 - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- EP1112458B1 EP1112458B1 EP99968702A EP99968702A EP1112458B1 EP 1112458 B1 EP1112458 B1 EP 1112458B1 EP 99968702 A EP99968702 A EP 99968702A EP 99968702 A EP99968702 A EP 99968702A EP 1112458 B1 EP1112458 B1 EP 1112458B1
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- EP
- European Patent Office
- Prior art keywords
- reflector
- light
- light beam
- light source
- lighting equipment
- 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
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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
- F21V7/10—Construction
-
- 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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/20—Lighting for medical use
- F21W2131/205—Lighting for medical use for operating theatres
Definitions
- the invention relates to a lighting apparatus according to the preamble of claim 1, cf. US-A-2,755,374.
- Such lighting devices are used, among other things, in stage lighting technology.
- So-called PAR lamps are known as stage lamps, for example, which have a lamp with a parabolic mirror in an aluminum housing and, for example, a color filter can be arranged in front of the light outlet to achieve a special optical effect.
- stage lamps for example, which have a lamp with a parabolic mirror in an aluminum housing and, for example, a color filter can be arranged in front of the light outlet to achieve a special optical effect.
- motorized filter belts with differently colored filter sections can be used.
- Rotatable effect discs (gobos) with various color filters arranged in the circumferential direction are therefore preferably used, in which the filters are not exposed to mechanical tensile stress.
- a disadvantage of these PAR lamps is that the color filter that can be used is at least that Diameter of the light outlet opening of the lamp housing must correspond to to completely capture the emerging light beam. Different color filters should be used the number of color filters arranged on a filter disc is limited, you do not want to exceed a practical size of the filter disc.
- a lamp structure for an operating light in which the light from a light source is focused by a parabolic mirror.
- the start of an optical fiber, consisting of a glass rod, is arranged in the focal point of the light beam.
- the light beams emerging divergently at the end of the light guide are parallelized by a reflector arrangement.
- the reflector arrangement essentially consists of a prism body and a reflector, the prism body deflecting all light rays emerging from the light guide and shining into the reflector in such a way that the light rays are reflected parallel by the reflector in the direction of the operating field.
- the light guide emerges from the rear space of the reflector through an opening in it and extends to just before the prism body.
- the particular advantage of such an arrangement is that the distance between the light source and the reflector can be chosen as desired, in that an almost lossless light guide guides the light from the light source to the reflector.
- This arrangement also solves the problem of fanning out the rays emerging from the light source and emitting them onto the operating field with almost the same illuminance.
- a possible use of other optical elements to influence the light beam, in particular to achieve special lighting effects, is neither mentioned nor desired. Rather, such lighting effects stand in the way of a surgical light, namely a uniform illumination with a light adapted to the daylight spectrum.
- a lighting apparatus of this type further develop that no limitation of the optical elements that can be used by the design, in particular by the diameter of the light exit opening of the Lamp housing.
- This object is achieved in a lighting apparatus of the type mentioned at the outset by that the light beam in a second focus converges between the first reflector and the second reflector, and a is arranged between the light source unit and the reflector unit arranged optical element.
- the lighting apparatus thus has three functional units.
- the light source unit has the task of a directed light beam - at least that predominant part of the light emitted by the light source - with at least one to provide a comparatively small cross-section at one point.
- the first reflectors to be used are preferably those which have a focus.
- the reflector surfaces of the vertex of the reflector rise comparatively steeply and in one the apex region of the optical axis of the light beam to be generated facing away again so that the angle between the imaginary lines between the The vertex and two opposite outer edges of the reflector are preferred is below 45 °.
- These reflectors have a focus - albeit a blurred one.
- the light beam can then be influenced by one optical element or a plurality of optical elements arranged one behind the other.
- optical elements not only color filters or diaphragms come into consideration as optical elements, but all types of optical elements are to be mentioned, provided they do not expand the light beam beyond a certain extent.
- the light beam is then expanded to a desired cross-sectional area in the reflector unit arranged behind the optical element.
- the light beam is first thrown back by the second reflector onto the concave third reflector, which reflects the then expanded light beam out of the lighting apparatus.
- the second reflector can preferably be convex or even flat, but any other configuration of the reflector that widens the light beam is also conceivable.
- an advantage of the apparatus according to the invention over the prior art is that the optical elements to be used are comparatively small due to the small cross section of the light beam in front of the reflector unit, and therefore the production costs of a lighting apparatus with regard to these elements can be minimized.
- Another advantage is that due to the functional separation from the generation of a directed light beam and its optical processing, there is much greater freedom in the structural design of the necessary apparatus housing with regard to the necessary heat dissipation. This is particularly advantageous if high-power lamps are used as light sources, which work at a very high operating temperature.
- the optical element to be used can be made particularly small if it is arranged in the region of the second focal point. Nevertheless, the optical element can also be arranged in front of or behind the second focal point, or a plurality of optical elements in front of, in and / or behind the focal point. If the light beam widening behind the second focal point passes through the concave third reflector, the second reflector can be flat.
- the focal point can be a lens can be arranged at a distance from its focal length as an optical element.
- the light beam can be parallelized so that the distance between Lens and the reflector unit can be almost any size. So on simple way a variety of optical elements in a row between lens and the reflector unit can be arranged.
- the distance from the second reflector to the third reflector is adjustable. This allows the degree of expansion of the light beam to be changed.
- the lighting apparatus has a device for positioning one or more optical elements.
- this device for positioning one or more optical elements can be a rotatable effect disk. So you can switch from one optical element to another by rotating the effect disc. Film-like image sequences can also be generated with one pass through different optical elements with a constantly rotating effect disk.
- the effect disk has only one passage opening and is otherwise opaque.
- the effect disc can thus be used as a switchable cover can be used to either completely transmit the light beam or block completely.
- the reflectors can be mirrored his.
- the reflectors can be coated with a metal layer.
- the reflectors are made of an aluminum-containing material.
- the reflective properties of aluminum are such that there is no need for mirroring in the sense of minimizing production costs.
- the reflector surfaces should be polished.
- Such reflectors can be drawn from an aluminum sheet.
- the first and the third reflector each formed in one piece with an essentially cylindrical housing wall, the housing walls can be connected to one another via an interference fit are. In this way, the simplest possible manufacture of the reflector housing and simple assembly of the individual parts possible.
- FIG. 1 shows the principle of the lighting apparatus according to the invention with a light source unit 3 having at least one light source 1 and a first reflector 2.
- the reflector 2 is designed in the manner of a rotationally symmetrical ellipsoid which is open on one side, the light source 1 having a first focal point of the Forms ellipsoids and the light is focused in a second focal point 4 .
- an effect disk 5 with optical elements 6 projects into the light beam.
- the light beam passes through an opening 7 through a rotationally symmetrical, concave third reflector 9 and is widened by a second, convex, rotationally symmetrical reflector 8 and deflected onto the third reflector 9 , from where the now widened light beam is reflected out of the lighting apparatus ,
- the second and third reflectors 8 , 9 form the reflector unit 10 .
- the rotationally symmetrical design of the mirrors and reflectors 2 , 8 and 9 is particularly advantageous in the case of punctiform light sources, since this results in a comparatively uniform distribution of the light intensity over the cross section of the light beam. Nevertheless, the mirrors and reflectors do not necessarily have to be rotationally symmetrical.
- the mirrors and reflectors 2 , 8 and 9 can be surface-symmetrical in the case of an essentially line-shaped light source, for example in the manner of a fluorescent tube.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Liquid Crystal Substances (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Vehicle Body Suspensions (AREA)
- Polarising Elements (AREA)
- Seal Device For Vehicle (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Die Erfindung betrifft eine Beleuchtungsapparatur
gemäß dem Oberbegriff des Anspruchs 1, vgl. US-A-2 755 374.The invention relates to a lighting apparatus
according to the preamble of
Solche Beleuchtungsapparaturen werden unter anderem in der Bühnenbeleuchtungstechnik
verwendet. So sind als Bühnenlampen beispielsweise sogenannte PAR-Lampen
bekannt, die in einem Aluminiumgehäuse eine Lampe mit einem Parabolspiegel aufweisen
und vor deren Lichtauslaß beispielsweise ein Farbfilter zum Erzielen eines besonderen
optischen Effektes angeordnet werden kann. Sollen verschiedene Farbfilter
im Wechsel eingesetzt werden, können motorisierte Filterbänder mit verschiedenfarbigen
Filterabschnitten verwendet werden. Diese haben jedoch den Nachteil, daß sie
schnell verschleißen und aufgrund der Zugbelastung des Motors reißen.
Daher werden bevorzugt drehbare Effektscheiben (Gobos) mit verschiedenen, in Umfangsrichtung
angeordneten Farbfiltern eingesetzt, bei denen die Filter nicht einer mechanischen
Zugbelastung ausgesetzt sind.Such lighting devices are used, among other things, in stage lighting technology. So-called PAR lamps are known as stage lamps, for example, which have a lamp with a parabolic mirror in an aluminum housing and, for example, a color filter can be arranged in front of the light outlet to achieve a special optical effect. If different color filters are to be used alternately, motorized filter belts with differently colored filter sections can be used. However, these have the disadvantage that they wear out quickly and tear due to the tensile load on the motor.
Rotatable effect discs (gobos) with various color filters arranged in the circumferential direction are therefore preferably used, in which the filters are not exposed to mechanical tensile stress.
Ein Nachteil dieser PAR-Lampen ist, daß die verwendbaren Farbfilter mindestens dem Durchmesser der Lichtaustrittsöffnung des Lampengehäuses entsprechen müssen, um den austretenden Lichtstrahl vollständig zu erfassen. Sollen verschiedene Farbfilter eingesetzt werden, ist die Anzahl der auf einer Filterscheibe angeordneten Farbfilter begrenzt, will man eine praktikable Größe der Filterscheibe nicht überschreiten.A disadvantage of these PAR lamps is that the color filter that can be used is at least that Diameter of the light outlet opening of the lamp housing must correspond to to completely capture the emerging light beam. Different color filters should be used the number of color filters arranged on a filter disc is limited, you do not want to exceed a practical size of the filter disc.
Aus der DE-OS 21 33 719 ist für eine Operationsleuchte ein Lampenaufbau bekannt,
bei dem das Licht einer Lichtquelle durch einen Parabolspiegel fokussiert wird. Im
Brennpunkt des Lichtstrahls ist der Anfang eines Lichtleiters, bestehend aus einem
Glasstab, angeordnet. Die am Ende des Lichtleiters divergent austretenden Lichtstrahlen
werden von einer Reflektoranordnung parallelisiert. Die Reflektoranordnung besteht
im wesentlichen aus einem Prismenkörper und einem Reflektor, wobei der Prismenkörper
sämtliche aus dem Lichtleiter austretenden Lichtstrahlen umlenkt und in
den Reflektor so einstrahlt, daß die Lichtstrahlen vom Reflektor parallel in Richtung
zum Operationsfeld reflektiert werden. Der Lichtleiter tritt dabei aus dem Rückraum
des Reflektors durch eine Öffnung in diesem hindurch und erstreckt sich bis kurz vor
den Prismenkörper.
Der besondere Vorteil einer solchen Anordnung liegt darin, daß der Abstand zwischen
der Lichtquelle und dem Reflektor beliebig gewählt werden kann, indem ein nahezu
verlustloser Lichtleiter das Lichts von der Lichtquelle bis zum Reflektor führt. Auch
wird mit dieser Anordnung die Aufgabe gelöst, die aus der Lichtquelle austretenden
Strahlen aufzufächern und mit nahezu gleicher Beleuchtungsstärke auf das Operationsfeld
abzustrahlen.
Eine mögliche Verwendung anderer optischer Elemente zur Beeinflussung des Lichtstrahls,
insbesondere zum Erzielen besonderer Lichteffekte, ist weder erwähnt noch
erwünscht. Vielmehr stehen solche Lichteffekte dem Zweck einer Operationsleuchte,
nämlich einer gleichmäßigen Ausleuchtung mit einem dem Tageslichtspektrum angepaßten
Licht, entgegen.From DE-OS 21 33 719 a lamp structure is known for an operating light in which the light from a light source is focused by a parabolic mirror. The start of an optical fiber, consisting of a glass rod, is arranged in the focal point of the light beam. The light beams emerging divergently at the end of the light guide are parallelized by a reflector arrangement. The reflector arrangement essentially consists of a prism body and a reflector, the prism body deflecting all light rays emerging from the light guide and shining into the reflector in such a way that the light rays are reflected parallel by the reflector in the direction of the operating field. The light guide emerges from the rear space of the reflector through an opening in it and extends to just before the prism body.
The particular advantage of such an arrangement is that the distance between the light source and the reflector can be chosen as desired, in that an almost lossless light guide guides the light from the light source to the reflector. This arrangement also solves the problem of fanning out the rays emerging from the light source and emitting them onto the operating field with almost the same illuminance.
A possible use of other optical elements to influence the light beam, in particular to achieve special lighting effects, is neither mentioned nor desired. Rather, such lighting effects stand in the way of a surgical light, namely a uniform illumination with a light adapted to the daylight spectrum.
Hieraus ergibt sich die Aufgabe der Erfindung, eine Beleuchtungsapparatur derart weiterzuentwickeln, daß keine Beschränkung der verwendbaren optischen Elemente durch die Bauart, insbesondere durch den Durchmesser der Lichtaustrittsöffnung des Lampengehäuses, besteht.This results in the object of the invention, a lighting apparatus of this type further develop that no limitation of the optical elements that can be used by the design, in particular by the diameter of the light exit opening of the Lamp housing.
Diese Aufgabe wird bei einer Beleuchtungsapparatur der eingangs genannten Art dadurch gelöst, daß der Lichtstrahl in einem zweiten Brennpunkt zwischen dem ersten Reflektor und dem zweiten Reflektor zusammenläuft, und ein zwischen der Lichtquelleneinheit und der Reflektor einheit angeordnetes optisches Element angeordnet ist.This object is achieved in a lighting apparatus of the type mentioned at the outset by that the light beam in a second focus converges between the first reflector and the second reflector, and a is arranged between the light source unit and the reflector unit arranged optical element.
Somit weist die Beleuchtungsapparatur drei Funktionseinheiten auf.The lighting apparatus thus has three functional units.
Die Lichtquelleneinheit hat die Aufgabe, einen gerichteten Lichtstrahl - mindestens den überwiegenden Teil des von der Lichtquelle abgestrahlten Lichts - mit einem zumindest an einer Stelle vergleichsweise kleinen Querschnitt zur Verfügung zu stellen. The light source unit has the task of a directed light beam - at least that predominant part of the light emitted by the light source - with at least one to provide a comparatively small cross-section at one point.
Bevorzugt einzusetzen sind als erste Reflektoren solche, die einen Fokus haben. Besonders geeignet sind rotationssymmetrische Parabolspiegel oder auch rotationssymmetrische, parabolartig geformte Reflektoren, deren Reflektorflächen vom Scheitelpunkt des Reflektors vergleichsweise steil ansteigen und sich in einem dem Scheitelpunkt abgewandten Bereich der optischen Achse des zu erzeugenden Lichtstrahls wieder annähern, so daß der Winkel zwischen den gedachten Linien zwischen dem Scheitelpunkt und zweier sich gegenüberliegenden Außenkanten des Reflektors bevorzugt unter 45° liegt. Diese Reflektoren haben einen - wenn auch unscharfen - Fokus.The first reflectors to be used are preferably those which have a focus. Especially rotation-symmetrical parabolic mirrors or also rotation-symmetrical, parabolic shaped reflectors, the reflector surfaces of the vertex of the reflector rise comparatively steeply and in one the apex region of the optical axis of the light beam to be generated facing away again so that the angle between the imaginary lines between the The vertex and two opposite outer edges of the reflector are preferred is below 45 °. These reflectors have a focus - albeit a blurred one.
In einem Bereich des Lichtstrahls mit geringem Querschnitt kann der Lichtstrahl dann
durch ein optisches Element oder mehrere hintereinander angeordnete optische Elemente
beeinflußt werden.
Als optische Elemente kommen nicht nur Farbfilter oder auch Blenden in Betracht,
sondern es sind jegliche Arten von optischen Elementen zu nennen, sofern sie den
Lichtstrahl nicht über ein bestimmtes Maß hinaus aufweiten.
In der hinter dem optischen Element angeordneten Reflektoreinheit wird der Lichtstrahl
dann auf eine gewünschte Querschnittsfläche aufgeweitet. Hierbei wird der
Lichtstrahl zunächst vom zweiten Reflektor auf den konkaven dritten Reflektor zurückgeworfen,
der den dann aufgeweiteten Lichtstrahl aus der Beleuchtungsapparatur heraus
reflektiert. Der zweite Reflektor kann hierfür bevorzugt konvex oder auch eben
ausgeführt sein, es ist allerdings auch jede andere, den Lichtstrahl aufweitende Gestaltung
des Reflektors denkbar.In a region of the light beam with a small cross section, the light beam can then be influenced by one optical element or a plurality of optical elements arranged one behind the other.
Not only color filters or diaphragms come into consideration as optical elements, but all types of optical elements are to be mentioned, provided they do not expand the light beam beyond a certain extent.
The light beam is then expanded to a desired cross-sectional area in the reflector unit arranged behind the optical element. Here, the light beam is first thrown back by the second reflector onto the concave third reflector, which reflects the then expanded light beam out of the lighting apparatus. For this purpose, the second reflector can preferably be convex or even flat, but any other configuration of the reflector that widens the light beam is also conceivable.
Somit besteht ein Vorteil der erfindungsgemäßen Apparatur gegenüber dem Stand der
Technik darin, daß die zu verwendenden optischen Elemente aufgrund des geringen
Querschnitts des Lichtstrahls vor der Reflektoreinheit vergleichsweise klein sein und
daher die Produktionskosten eines Beleuchtungsapparats in bezug auf diese Elemente
minimiert werden können.
Ein weiterer Vorteil besteht darin, daß aufgrund der funktionalen Trennung von der
Erzeugung eines gerichteten Lichtstrahls und dessen optischer Aufbereitung wesentlich
größere Freiheiten bei der konstruktiven Ausgestaltung des notwendigen Apparategehäuses
hinsichtlich der notwendigen Wärmeabfuhr bestehen. Dies ist insbesondere
dann von Vorteil, wenn als Lichtquellen Hochleistungslampen eingesetzt werden, die
mit einer sehr hohen Betriebstemperatur arbeiten. Thus, an advantage of the apparatus according to the invention over the prior art is that the optical elements to be used are comparatively small due to the small cross section of the light beam in front of the reflector unit, and therefore the production costs of a lighting apparatus with regard to these elements can be minimized.
Another advantage is that due to the functional separation from the generation of a directed light beam and its optical processing, there is much greater freedom in the structural design of the necessary apparatus housing with regard to the necessary heat dissipation. This is particularly advantageous if high-power lamps are used as light sources, which work at a very high operating temperature.
Entsprechendes gilt für die möglicherweise am optischen Element selbst abzuführende
Wärme, die bei der Absorption von Licht anfällt.
Das zu verwendende optische Element kann besonders
klein ausgebildet sein, wenn es im Bereich des zweiten Brennpunkts angeordnet wird.
Gleichwohl kann das optische Element auch vor oder hinter dem zweiten Brennpunkt
angeordnet sein, oder auch mehrere optische Elemente vor, im und/oder hinter dem
Brennpunkt.
Tritt der sich hinter dem zweiten Brennpunkt aufweitende Lichtstrahl durch den konkaven
dritten Reflektor hindurch, kann der zweite Reflektor eben ausgebildet sein.The same applies to the heat which may possibly be dissipated on the optical element itself and which arises when light is absorbed.
The optical element to be used can be made particularly small if it is arranged in the region of the second focal point. Nevertheless, the optical element can also be arranged in front of or behind the second focal point, or a plurality of optical elements in front of, in and / or behind the focal point.
If the light beam widening behind the second focal point passes through the concave third reflector, the second reflector can be flat.
In einer bevorzugten Weiterbildung dieser Ausführungsform kann hinter dem Brennpunkt im Abstand ihrer Brennweite als optisches Element eine Linse angeordnet sein. Mit dieser Linse kann der Lichtstrahl parallelisiert werden, so daß der Abstand zwischen Linse und der Reflektoreinheit nahezu beliebig groß sein kann. So können auf einfache Weise eine Vielzahl von optischen Elementen hintereinander zwischen Linse und der Reflektoreinheit angeordnet werden.In a preferred development of this embodiment, the focal point can be a lens can be arranged at a distance from its focal length as an optical element. With this lens, the light beam can be parallelized so that the distance between Lens and the reflector unit can be almost any size. So on simple way a variety of optical elements in a row between lens and the reflector unit can be arranged.
In einer anderen bevorzugten Ausführungsform ist der Abstand von zweitem Reflektor
zu drittem Reflektor einstellbar.
Hierdurch kann der Grad der Aufweitung des Lichtstrahls verändert werden.In another preferred embodiment, the distance from the second reflector to the third reflector is adjustable.
This allows the degree of expansion of the light beam to be changed.
In einer weiteren bevorzugten Ausgestaltung weist die Beleuchtungsapparatur eine
Vorrichtung zum Positionieren eines oder mehrerer optischer Elemente auf.
Beispielsweise kann diese Vorrichtung zum Positionieren eines oder mehrerer optischer
Elemente eine drehbar gelagerte Effektscheibe sein. So kann durch Drehung der
Effektscheibe von einem optischen Element zu einem anderen gewechselt werden.
Auch können bei einem Durchlauf verschiedener optischer Elemente bei sich konstant
drehender Effektscheibe filmartige Bildsequenzen erzeugt werden. In a further preferred embodiment, the lighting apparatus has a device for positioning one or more optical elements.
For example, this device for positioning one or more optical elements can be a rotatable effect disk. So you can switch from one optical element to another by rotating the effect disc. Film-like image sequences can also be generated with one pass through different optical elements with a constantly rotating effect disk.
In einfachster Ausführung weist die Effektscheibe lediglich eine Durchtrittsöffnung auf und ist ansonsten lichtundurchlässig. Somit kann die Effektscheibe als schaltbare Blende verwendet werden, um den Lichtstrahl entweder vollständig durchzulassen oder vollständig zu blockieren.In the simplest version, the effect disk has only one passage opening and is otherwise opaque. The effect disc can thus be used as a switchable cover can be used to either completely transmit the light beam or block completely.
Um einen möglichst großen Reflexionsgrad zu erreichen, können die Reflektoren verspiegelt sein. Hierzu können die Reflektoren mit einer Metallschicht bedampft werden.In order to achieve the highest possible degree of reflection, the reflectors can be mirrored his. For this purpose, the reflectors can be coated with a metal layer.
Auf der anderen Seite ist es von Vorteil, wenn die Reflektoren aus einem aluminiumhaltigen
Werkstoff gebildet sind. Die Reflexionseigenschaften von Aluminium sind derart,
daß auf eine Verspiegelung im Sinne der Produktionskostenminimierung verzichtet
werden kann. Um verbesserte Reflexionseigenschaften des Aluminiums zu erreichen,
sollten die Reflektoroberflächen poliert sein.
Solche Reflektoren können aus einem Aluminiumblech gezogen werden.On the other hand, it is advantageous if the reflectors are made of an aluminum-containing material. The reflective properties of aluminum are such that there is no need for mirroring in the sense of minimizing production costs. In order to achieve improved reflection properties of the aluminum, the reflector surfaces should be polished.
Such reflectors can be drawn from an aluminum sheet.
In einer weiteren vorteilhaften Ausgestaltung sind der erste und der dritte Reflektor jeweils einstückig mit einer im wesentlichen zylindrischen Gehäusewandung ausgebildet, wobei die Gehäusewandungen über eine Preßpassung miteinander verbindbar sind. Auf diese Weise ist eine möglichst einfache Herstellung der Reflektorgehäuse sowie eine einfache Montage der Einzelteile möglich.In a further advantageous embodiment, the first and the third reflector each formed in one piece with an essentially cylindrical housing wall, the housing walls can be connected to one another via an interference fit are. In this way, the simplest possible manufacture of the reflector housing and simple assembly of the individual parts possible.
Im folgenden wird die Erfindung anhand einer das Prinzip der Erfindung darstellenden Figur 1 näher erläutert.In the following, the invention is based on the principle of the invention Figure 1 explained in more detail.
Figur 1 zeigt das Prinzip der erfindungsgemäßen Beleuchtungsapparatur mit einer
mindestens eine Lichtquelle 1 und einen ersten Reflektor 2 aufweisenden Lichtquelleneinheit
3. Der Reflektor 2 ist in der Art eines rotationssymmetrischen Ellipsoids ausgebildet,
das an einer Seite offen ist, wobei die Lichtquelle 1 einen ersten Brennpunkt
des Ellipsoids bildet und das Licht in einem zweiten Brennpunkt 4 fokussiert wird.
Vor dem Brennpunkt 4 ragt eine Effektscheibe 5 mit optischen Elementen 6 in den
Lichtstrahl hinein.
Der Lichtstrahl tritt durch eine Öffnung 7 durch einen rotationssymmetrischen, konkaven
dritten Reflektor 9 hindurch und wird von einem zweiten, konvex ausgebildeten,
rotationssymmetrischen Reflektor 8 aufgeweitet und auf den dritten Reflektor 9 umgelenkt,
von wo aus der nunmehr aufgeweitete Lichtstrahl aus der Beleuchtungsapparatur
heraus reflektiert wird. Der zweite und dritte Reflektor 8, 9 bilden die Reflektoreinheit
10.FIG. 1 shows the principle of the lighting apparatus according to the invention with a light source unit 3 having at least one
In front of the
The light beam passes through an
Die rotationssymmetrische Ausbildung der Spiegel und Reflektoren 2, 8 und 9 ist insbesondere
bei punktförmigen Lichtquellen von Vorteil, da hiermit eine vergleichsweise
gleichmäßige Verteilung der Lichtintensität über den Querschnitt des Lichtstrahls erreicht
wird.
Dennoch müssen die Spiegel und Reflektoren nicht zwingend rotationssymmetrisch
ausgebildet sein. So können die Spiegel und Reflektoren 2, 8 und 9 bei einer im wesentlichen
strichförmigen Lichtquelle, beispielsweise in der Art einer Leuchtröhre, flächensymmetrisch
sein.The rotationally symmetrical design of the mirrors and
Nevertheless, the mirrors and reflectors do not necessarily have to be rotationally symmetrical. For example, the mirrors and
Claims (9)
- Lighting equipment with a light source unit (3) having at least one light source (1) and one first reflector (2), wherein the first reflector (2) is constructed in the fashion of an ellipsoid open at one side, the light source is constructed in the region of the first focal point of the first reflector and focuses the light emitted by the light source (1) to form a light beam, and a reflector unit (10) with a second reflector (8) and a concave third reflector (9), wherein the concave third reflector (9) has an aperture (7) for the light beam and the light beam is reflected from the second reflector (8) on to the third reflector (9), characterised in that the light beam converges at a second focal point (4) between the first reflector (2) and the second reflector (8), and an optical element (6) arranged between the light source element (3) and the reflector unit (10) is provided.
- Lighting equipment according to Claim 1, characterised in that a lens is arranged behind the second focal point (4) at the distance of its focal length.
- Lighting equipment according to Claim 1 or 2, characterised in that the distance from the second reflector (8) to the third reflector (9) is adjustable.
- Lighting equipment according to one of the preceding claims, characterised by a device for positioning one or a plurality of optical elements.
- Lighting equipment according Claim 4, characterised in that the device for positioning one or a plurality of optical elements (6) is a pivoted effect disk.
- Lighting equipment according to one of the preceding claims, characterised in that the reflectors (2, 8, 9) are reflection-coated.
- Lighting equipment according to one of the preceding claims, characterised in that the reflectors (2, 8, 9) are made of an aluminium-containing material.
- Lighting equipment according to Claim 7, characterised in that the reflectors (2, 8, 9) are drawn from an aluminium sheet.
- Lighting equipment according to one of the preceding claims, characterised in that the first reflector (2) and the third reflector (9) are each constructed as one piece with a substantially cylindrical casing shell and the casing shells are joined one to the other via a press fit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19840475A DE19840475A1 (en) | 1998-09-04 | 1998-09-04 | Lighting equipment |
| DE19840475 | 1998-09-04 | ||
| PCT/DE1999/002817 WO2000014447A1 (en) | 1998-09-04 | 1999-09-03 | Lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1112458A1 EP1112458A1 (en) | 2001-07-04 |
| EP1112458B1 true EP1112458B1 (en) | 2003-02-05 |
Family
ID=7879873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99968702A Expired - Lifetime EP1112458B1 (en) | 1998-09-04 | 1999-09-03 | Lighting device |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6572246B1 (en) |
| EP (1) | EP1112458B1 (en) |
| AT (1) | ATE232279T1 (en) |
| AU (1) | AU1147900A (en) |
| DE (2) | DE19840475A1 (en) |
| ES (1) | ES2190285T3 (en) |
| WO (1) | WO2000014447A1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1373016A1 (en) * | 2001-03-27 | 2004-01-02 | Meridian Automotive Systems, Inc. | Vehicular lamp assembly with a simplified structure and chmsl and tail lamp incorporating the same |
| ITTO20020371A1 (en) * | 2002-05-06 | 2003-11-06 | Bruno Baiardi | LIGHT PROJECTOR WITH SET OF ROTATING FILTERS AROUND YOUR OWN AXIS. |
| US7178937B2 (en) * | 2004-01-23 | 2007-02-20 | Mcdermott Vernon | Lighting device and method for lighting |
| US8016470B2 (en) * | 2007-10-05 | 2011-09-13 | Dental Equipment, Llc | LED-based dental exam lamp with variable chromaticity |
| DE102005061204A1 (en) * | 2005-12-21 | 2007-07-05 | Perkinelmer Elcos Gmbh | Lighting device, lighting control device and lighting system |
| US8002446B1 (en) | 2008-06-09 | 2011-08-23 | Koninklijke Philips Electronics N.V. | Virtual direct and indirect suspended lighting fixture |
| US8439525B2 (en) * | 2008-08-29 | 2013-05-14 | Abl Ip Holding Llc | Luminaires having enhanced light distribution and applications thereof |
| US20100053971A1 (en) * | 2008-08-29 | 2010-03-04 | Abl Ip Holding Llc | Asymmetric Lighting Systems and Applications Thereof |
| US8282248B1 (en) | 2008-12-03 | 2012-10-09 | Koninklijke Philips Electronics N.V. | Luminaire including upper and lower dome-shaped optical elements |
| US9081125B2 (en) | 2011-08-08 | 2015-07-14 | Quarkstar Llc | Illumination devices including multiple light emitting elements |
| US8573823B2 (en) | 2011-08-08 | 2013-11-05 | Quarkstar Llc | Solid-state luminaire |
| JP5989115B2 (en) | 2011-08-08 | 2016-09-07 | クォークスター・エルエルシー | Lighting device comprising a plurality of light emitting elements |
| TWM435795U (en) * | 2012-04-03 | 2012-08-11 | Inhon Internat Co Ltd | Lighting structure |
| CN104755832B (en) | 2012-09-13 | 2018-12-21 | 夸克星有限责任公司 | The lighting system directly or indirectly illuminated is provided |
| WO2014043369A2 (en) | 2012-09-13 | 2014-03-20 | Quarkstar Llc | Devices for workspace illumination |
| EP2864694B1 (en) | 2013-02-08 | 2016-01-20 | Quarkstar LLC | Illumination device providing direct and indirect illumination |
| US9410680B2 (en) | 2013-04-19 | 2016-08-09 | Quarkstar Llc | Illumination devices with adjustable optical elements |
| EP2867710B1 (en) | 2013-07-18 | 2016-06-29 | Quarkstar LLC | Illumination device in which source light injection is non-parallel to device's optical axis |
| EP2875280B8 (en) | 2013-09-17 | 2017-01-18 | Quarkstar LLC | Light guide illumination device with light divergence modifier |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755374A (en) * | 1952-03-13 | 1956-07-17 | Ott Walter | Reflecting system |
| US3294962A (en) * | 1965-02-23 | 1966-12-27 | Hilzen Hy | Indirect or "bounce" lighting apparatus |
| DE2133719C3 (en) * | 1971-07-07 | 1978-08-24 | Original Hanau Quarzlampen Gmbh, 6450 Hanau | Operating light |
| GB1360481A (en) * | 1972-02-14 | 1974-07-17 | Lucas Industries Ltd | Lamps |
| US3900726A (en) * | 1974-04-25 | 1975-08-19 | Berkey Colortran | Compact follow spot |
| DE8604395U1 (en) * | 1986-02-19 | 1988-12-01 | Daume & Jordan GmbH & Co KG, 5600 Wuppertal | Glare-free luminaire with strip-shaped anti-dazzle reflector |
| GB8805581D0 (en) * | 1988-03-09 | 1988-04-07 | Pulsar Light Of Cambridge Ltd | Improved spotlight & control system therefor |
| JP3173033B2 (en) * | 1991-03-20 | 2001-06-04 | ソニー株式会社 | Light emitting device |
| US5335158A (en) * | 1992-05-21 | 1994-08-02 | Eastman Kodak Company | High efficiency linear light source |
| DE4417695C2 (en) * | 1994-05-20 | 1998-01-29 | Reitter & Schefenacker Gmbh | Motor vehicle light |
| EP0751339A3 (en) * | 1995-06-30 | 1998-05-06 | CUNNINGHAM, David W. | Lighting fixture having a cast reflector |
| GB2310035A (en) * | 1996-02-06 | 1997-08-13 | Stephen Ernest Watts | Special effect lighting |
-
1998
- 1998-09-04 DE DE19840475A patent/DE19840475A1/en not_active Withdrawn
-
1999
- 1999-09-03 AU AU11479/00A patent/AU1147900A/en not_active Abandoned
- 1999-09-03 AT AT99968702T patent/ATE232279T1/en not_active IP Right Cessation
- 1999-09-03 DE DE59904233T patent/DE59904233D1/en not_active Expired - Fee Related
- 1999-09-03 EP EP99968702A patent/EP1112458B1/en not_active Expired - Lifetime
- 1999-09-03 WO PCT/DE1999/002817 patent/WO2000014447A1/en active IP Right Grant
- 1999-09-03 US US09/786,395 patent/US6572246B1/en not_active Expired - Fee Related
- 1999-09-03 ES ES99968702T patent/ES2190285T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU1147900A (en) | 2000-03-27 |
| WO2000014447A1 (en) | 2000-03-16 |
| ATE232279T1 (en) | 2003-02-15 |
| DE59904233D1 (en) | 2003-03-13 |
| US6572246B1 (en) | 2003-06-03 |
| EP1112458A1 (en) | 2001-07-04 |
| ES2190285T3 (en) | 2003-07-16 |
| DE19840475A1 (en) | 2000-03-30 |
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