EP2594843B1 - Operating light - Google Patents
Operating light Download PDFInfo
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- EP2594843B1 EP2594843B1 EP11009153.5A EP11009153A EP2594843B1 EP 2594843 B1 EP2594843 B1 EP 2594843B1 EP 11009153 A EP11009153 A EP 11009153A EP 2594843 B1 EP2594843 B1 EP 2594843B1
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- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 238000001228 spectrum Methods 0.000 claims abstract description 15
- 238000003384 imaging method Methods 0.000 claims abstract description 6
- 238000012634 optical imaging Methods 0.000 claims description 10
- 238000009877 rendering Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000005855 radiation Effects 0.000 abstract description 10
- 238000001356 surgical procedure Methods 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000295 emission spectrum Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- 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
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
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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
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- 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
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
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- 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a surgical light with at least one optical imaging element and at least two LEDs that emit light with different spectra.
- surgical light here stands for a light that is designed for medical applications.
- An operating light according to the invention should therefore be particularly suitable for illuminating a surgical field or for illuminating an oral cavity (dental light).
- light is intended to cover not only the visible range of the spectrum, but also electromagnetic radiation beyond.
- LEDs light emitting diodes
- the use of LEDs is very stable and low maintenance with a long service life.
- the compact design allows a good beam guidance.
- the radiation characteristic of the LED beam lobe
- Another advantage of using LEDs is their thermal properties. On the one hand, it is possible to keep very low LED temperature increases on and in the luminaire housing due to the heat of the light sources and on the other hand, the heating in the operating field due to the low in infrared infrared radiation components are kept very low.
- the EP 1 741 974 B1 describes an operating light with reflector elements and LEDs, wherein the main emission of the LEDs with the optical axis of the lamp forms an angle in the range of 60 ° to 120 °.
- the LEDs generate spectra in the color temperature range from 4,000 K to 4,600 K.
- a luminescent layer is provided.
- FIG. 5 shows a surgical lamp according to the preamble of claim 1, in which a plurality of LEDs are arranged very close to each other so that the radiation spectra (emissions) generated by them are superimposed before they strike an optical imaging element, such as a reflector element.
- the LEDs contain a warm white LED and preferably in addition, at least one green LED and a z. B. red LED provided.
- the EP 1 568 936 A1 shows an operating light, in which each luminous element has three light sources of different emission spectra, wherein the emissions of the light sources in the light field (ie the medical operation field) are superimposed. Also in this surgical light emissions of white LEDs and the emissions of colored LEDs are superimposed on each other.
- the WO 2008/087404 A1 shows a lighting device with a white LED, a red LED and a color filter.
- the illumination device also includes ellipsoidal mirrors per LED, which focuses the radiation of the LEDs onto passages of a pinhole array and then passes through a lens array onto the color filter.
- the invention has for its object to provide an operating light of the type mentioned above, which allows a very good illumination of a medical operation field with the least possible expenditure on equipment (ie in particular cost).
- the invention provides an operating light according to claim 1, preferably with at least one optical imaging element, in particular a reflector element, and with at least two LEDs which produce light of different color temperatures, wherein the surgical light contains at least one LED which emits warm white and at least one LED that emits cold white.
- the surgical light according to the invention uses exclusively the above-mentioned LEDs, so no further LEDs, such as the prior art, the mixed colored, such as green or blue radiation, the warm white and cold white light.
- the term "LED” is intended here to include that the LED optionally contains a so-called conversion layer, with which the desired emission is achieved; The conversion layer is then part of the LED. Conversion layers of the type in question are known as such in the prior art.
- the invention is based on the finding that a very good illumination in the surgical field is achieved by the combination of warm white light and cold white light.
- a suitable color temperature and color rendering can be achieved.
- the mixture of the warm white and the cold white light already takes place in the surgical light, so that the surgical field illumination is in terms of color temperature and color rendering does not change when a portion of the surgical field is shaded (eg, by the surgeon's head or arm).
- the mixture of cold white and warm white light in the beam path between the surgical light and surgical field is such that the mixture takes place on a short distance in the beam path after leaving the surgical light, z. B. on a distance of less than 30cm, in particular less than 20cm, after leaving the operating light. Even with this mixture, it is achieved that shading in the operating field remains without any significant effect on the color temperature and the color rendering.
- the inventive combination of warm white light and cold white light allows a very simple construction of the surgical light with a relatively simple installation and also the electronic control of the individual LEDs is comparatively simple, since the emissions of kaltweiss LEDs and warm white LEDs simply on the respective current are adjustable.
- the operating light contains at least one reflector element and that the main emission directions of the LEDs (ie the axes of the radiation lobes) each form an angle with the optical axis of the lamp, which is between 60 ° and 120 °.
- the operating light has a plurality of imaging elements, in particular in the form of reflector elements, wherein each imaging element in each case at least one LED is assigned (see dependent claim 2).
- each LED is arranged in a plane which contains the optical axis of the operating light and the main emission of the LED and which symmetrically divides the reflector element associated with the respective LED (see dependent claim 3).
- Another preferred embodiment of the surgical light provides that the LEDs are slidably supported in the operating light, in particular parallel to the optical axis of the lamp slidably (see dependent claim 4).
- At least one cold white emitting LED and light of at least one warm white emitting LED are at least partially superimposed (mixed) before the light reaches an optical imaging element in the surgical light (see Claim 5).
- This embodiment of the invention can also be supplemented or modified to the effect that the superimposition of the cold white and the warm white light also takes place directly on the imaging element.
- the two aforementioned effects can be achieved, in particular, by arranging at least one cold white emitting LED and at least one warm white emitting LED at a very small distance from each other, e.g. B. with a distance less than 5mm, in particular less than 3mm (see. Dependent claim 6).
- At least one cold white emitting LED and at least one warm white emitting LED are accommodated on a single common chip.
- Fig. 1 shows a surgical lamp 10 in section through the optical axis 18 of the surgical light.
- Fig. 2 shows a view of this surgical light from the front.
- the surgical light 10 contains as optical imaging elements three reflector elements 12, 14, 16, which join together substantially completely to form a completely closed reflector.
- the operating light has a 3-fold rotational symmetry about its optical axis 18.
- Each of the reflector elements 12, 14, 16 is associated with a respective LED 20a, 20b and 20c.
- the LEDs 20a, 20b, 20c are mounted on a base 22.
- An electronic control (not shown) makes it possible to selectively control the individual LEDs, in particular with regard to the current intensity used in each case for an LED.
- the said LEDs produce either warm white light or cold white light, wherein in a surgical light at least one warm white light generating LED and at least one cold white light-emitting LED are combined with each other such that the emissions are mixed.
- a cold white emitting LED 20a is combined with two warm white emitting LEDs 20b, 20c.
- a warm white emitting LED can be combined with two cold white emitting LEDs.
- the individual LEDs are detachably fastened to the base 22 with screws 24.
- a common base plate 26 supports the reflectors 12, 14, 16, which are fastened by screws 28 to the base plate 26.
- the Hauptabstrahlraum 34a, 34b, 34c of an LED is perpendicular to the optical axis 18 of the lamp.
- the reflector element is in accordance with in the illustrated embodiment in section Fig. 1 elliptical, so that the radiation, which is reflected by the reflector according to the main emission direction 34, leaves the luminaire parallel to the optical axis 18.
- the screw 32 can be rotated to move the socket 22 with the LEDs axially.
- Fig. 2 shows, three reflector elements 12, 14, 15 are housed in a housing 36 in this embodiment.
- the LEDs are each arranged in a plane which contains the optical axis 18 and also the respective main emission directions 34a, 34b, 34c of the individual LEDs. So these three levels are in Fig. 2 perpendicular to the plane of the drawing and each contain the main emission of the associated LED, so that these levels the respective reflector element 12, 14, 16 divide so that it can be reflected mirror-symmetrically at this level.
- optical imaging elements in the form of the reflector elements are arranged and positioned such that the radiations of the three LEDs 20a, 20b, 20c are superimposed and mixed with each other before or at least when they hit the surgical field.
- Fig. 3 shows a ring 40 on which 8 operating lights 10a, 10b, 10c, 10d, 10e, 10f, 10g and 10h are mounted at regular intervals. These are surgical lights according to the Figures 1 and 2 . On the ring 40 alternately operating lights can be arranged, in which a cold white LED with two warm white and a warm white with two cold white LEDs are combined.
- the color rendering index Ra in the LEDs used is 90 or better at each color temperature.
- FIG. 4 shows another embodiment of an operating light 100.
- a light-emitting element 110 which can also be referred to as a chip, carries three LEDs 120, 130 and 140.
- One LED is cool white emitting and two other LEDs are warm white emitting. Or one LED is warm white emitting and two LEDs are cold white emitting.
- the emissions of the LEDs 120, 130, 140 are incident on a reflector 150 which redirects the incident emissions to the surgical field 160.
- a reflector 150 which redirects the incident emissions to the surgical field 160.
- the operating light in the embodiment according to Fig. 4 otherwise be constructed similar to the embodiment according to the FIGS. 1, 2 and 3 ,
- a homogeneous superposition of the emissions of the LEDs 120, 140 takes place in a single solid angle even before the emissions hit the reflector 150.
- the thus superimposed cold white and warm white emissions in the beam path between the reflector 150 and the surgical field 160 thus have a certain color temperature and a specific color rendering index.
- An inserted into the area between the reflector 150 and the operating field 160 object such.
- the luminous element 110 represents a punctiform light source with the superimposed emission spectra.
- Fig. 5 shows an exemplary arrangement of the three LEDs 120, 130, 140.
- the center of the large circle according to Fig. 5 denotes the optical axis 18 of the luminous element 110, to which the LEDs 120, 130, 140 are assigned. This axis is perpendicular to the plane of the drawing.
- the circle of radius R2 around the optical axis intersects the centers of each of the LEDs. The distance of the center of each LED from the optical axis is thus R2.
- the distance R2 should be minimized as far as possible. Good results are achieved with a distance R2 of 4 to 5mm. A further improvement results with a distance of about 3mm or smaller. Preferably, the distance the center of the LEDs from the optical axis 18 is the same.
- the LEDs described above each have conversion layers to produce warm white light and cool white light as defined above.
- the color temperature of the operating field can be adjusted generated irradiation are adjusted, for. In the color temperature range from 3,500 Kelvin to 5,500 Kelvin, depending on the wishes of the surgeon.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Die Erfindung betrifft eine Operationsleuchte mit mindestens einem optischen Abbildungselement und mindestens zwei LEDs, die Licht mit unterschiedlichen Spektren emittieren.The invention relates to a surgical light with at least one optical imaging element and at least two LEDs that emit light with different spectra.
Der Begriff "Operationsleuchte" steht hier für eine Leuchte, die für medizinische Anwendungen ausgelegt ist. Eine erfindungsgemäße Operationsleuchte soll also insbesondere geeignet sein zur Beleuchtung eines Operationsfeldes oder auch zur Beleuchtung eines Mundinnenraumes (Dentalleuchte). Der Begriff "Licht" soll hier nicht nur den sichtbaren Bereich des Spektrums erfassen, sondern auch elektromagnetische Strahlung darüber hinaus.The term "surgical light" here stands for a light that is designed for medical applications. An operating light according to the invention should therefore be particularly suitable for illuminating a surgical field or for illuminating an oral cavity (dental light). The term "light" is intended to cover not only the visible range of the spectrum, but also electromagnetic radiation beyond.
Der Einsatz von LEDs (lichtemittierenden Dioden) als Lichtquelle in Operationsleuchten ist bekannt und hat eine Reihe von Vorteilen: Der Betrieb der Leuchte ist bei langer Lebensdauer sehr stabil und wartungsarm. Die kompakte Bauweise ermöglicht eine gute Strahlführung. Dabei kann die Strahlungscharakteristik der LED (Strahlkeule) im Zusammenwirken mit Reflektoren optimal ausgenutzt werden. Ein weiterer Vorteil des Einsatzes von LEDs liegt in deren thermischen Eigenschaften. Zum einen ist es möglich, mit LEDs Temperaturerhöhungen am und im Leuchtengehäuse aufgrund der Abwärme der Lichtquellen sehr gering zu halten und zum anderen kann auch die Erwärmung im Operationsfeld aufgrund der bei LEDs geringen infraroten Strahlungsanteile sehr gering gehalten werden.The use of LEDs (light emitting diodes) as a light source in surgical lights is known and has a number of advantages: The operation of the lamp is very stable and low maintenance with a long service life. The compact design allows a good beam guidance. In this case, the radiation characteristic of the LED (beam lobe) can be optimally utilized in cooperation with reflectors. Another advantage of using LEDs is their thermal properties. On the one hand, it is possible to keep very low LED temperature increases on and in the luminaire housing due to the heat of the light sources and on the other hand, the heating in the operating field due to the low in infrared infrared radiation components are kept very low.
Die
Die
Die
Die
Der Erfindung liegt die Aufgabe zugrunde, eine Operationsleuchte der eingangs genannten Art bereit zu stellen, die mit möglichst geringem apparativen Aufwand (also insbesondere kostengünstig) eine sehr gute Ausleuchtung eines medizinischen Operationsfeldes ermöglicht.The invention has for its object to provide an operating light of the type mentioned above, which allows a very good illumination of a medical operation field with the least possible expenditure on equipment (ie in particular cost).
Hierzu stellt die Erfindung eine Operationsleuchte gemäß Anspruch 1 bereit, mit vorzugsweise mindestens einem optischen Abbildungselement, wie insbesondere einem Reflektorelement, und mit mindestens zwei LEDs, die Licht unterschiedlicher Farbtemperaturen erzeugen, wobei die Operationsleuchte zumindest eine LED enthält, die warmweiß emittiert und zumindest eine LED, die kaltweiß emittiert. Dabei verwendet die erfindungsgemäße Operationsleuchte ausschließlich die vorstehend genannten LEDs, also keine weiteren LEDs, wie der Stand der Technik, der farbige, wie grüne oder blaue Strahlung, dem warmweißen und kaltweißen Licht zumischt. Der Begriff "LED" soll hier beinhalten, dass die LED ggf. eine sogenannte Konversionsschicht enthält, mit der die gewünschte Emission erzielt wird; die Konversionsschicht gehört dann also mit zur LED. Konversionsschichten der hier in Rede stehenden Art sind als solche im Stand der Technik bekannt.For this purpose, the invention provides an operating light according to claim 1, preferably with at least one optical imaging element, in particular a reflector element, and with at least two LEDs which produce light of different color temperatures, wherein the surgical light contains at least one LED which emits warm white and at least one LED that emits cold white. In this case, the surgical light according to the invention uses exclusively the above-mentioned LEDs, so no further LEDs, such as the prior art, the mixed colored, such as green or blue radiation, the warm white and cold white light. The term "LED" is intended here to include that the LED optionally contains a so-called conversion layer, with which the desired emission is achieved; The conversion layer is then part of the LED. Conversion layers of the type in question are known as such in the prior art.
Der Erfindung liegt die Erkenntnis zugrunde, dass durch die Kombination von warmweißem Licht und kaltweißem Licht eine sehr gute Beleuchtung im Operationsfeld erreicht wird. Dabei kann insbesondere eine gut geeignete Farbtemperatur und Farbwiedergabe erreicht werden.The invention is based on the finding that a very good illumination in the surgical field is achieved by the combination of warm white light and cold white light. In particular, a suitable color temperature and color rendering can be achieved.
Bevorzugt erfolgt die Mischung des warmweißen und des kaltweißen Lichtes schon in der Operationsleuchte, sodass die Operationsfeldbeleuchtung sich hinsichtlich Farbtemperatur und Farbwiedergabe nicht ändert, wenn ein Teil des Operationsfeldes abgeschattet wird (z. B. durch Kopf oder Arm des Chirurgen).Preferably, the mixture of the warm white and the cold white light already takes place in the surgical light, so that the surgical field illumination is in terms of color temperature and color rendering does not change when a portion of the surgical field is shaded (eg, by the surgeon's head or arm).
Gemäß einer anderen Ausgestaltung der Erfindung erfolgt die Mischung des kaltweißen und warmweißen Lichtes im Strahlengang zwischen Operationsleuchte und Operationsfeld derart, dass die Mischung auf einer kurzen Wegstrecke im Strahlengang nach Verlassen der Operationsleuchte erfolgt, z. B. auf einer Wegstrecke von weniger als 30cm, insbesondere weniger als 20cm, nach Verlassen der Operationsleuchte. Auch mit dieser Mischung wird erreicht, dass eine Abschattung im Operationsfeld ohne wesentliche Auswirkung auf die Farbtemperatur und die Farbwiedergabe bleibt.According to another embodiment of the invention, the mixture of cold white and warm white light in the beam path between the surgical light and surgical field is such that the mixture takes place on a short distance in the beam path after leaving the surgical light, z. B. on a distance of less than 30cm, in particular less than 20cm, after leaving the operating light. Even with this mixture, it is achieved that shading in the operating field remains without any significant effect on the color temperature and the color rendering.
Die erfindungsgemäße Kombination vom warmweißen Licht und kaltweißen Licht ermöglicht einen sehr einfachen Aufbau der Operationsleuchte mit einer vergleichsweise einfachen Montage und darüber hinaus ist auch die elektronische Steuerung der einzelnen LEDs vergleichsweise einfach, da die Emissionen der kaltweißen LEDs und der warmweißen LEDs einfach über die jeweilige Stromstärke einstellbar sind.The inventive combination of warm white light and cold white light allows a very simple construction of the surgical light with a relatively simple installation and also the electronic control of the individual LEDs is comparatively simple, since the emissions of kaltweiss LEDs and warm white LEDs simply on the respective current are adjustable.
Gemäß Anspruch 1 ist vorgesehen, dass die Operationsleuchte mindestens ein Reflektorelement enthält und dass die Hauptabstrahlrichtungen der LEDs (also die Achsen der Strahlungskeulen) jeweils einen Winkel mit der optischen Achse der Leuchte bilden, der zwischen 60° und 120° liegt.According to claim 1 it is provided that the operating light contains at least one reflector element and that the main emission directions of the LEDs (ie the axes of the radiation lobes) each form an angle with the optical axis of the lamp, which is between 60 ° and 120 °.
Gemäß einer bevorzugten Ausgestaltung hat die Operationsleuchte mehrere Abbildungselemente, insbesondere in Form von Reflektorelementen, wobei jedem Abbildungselement jeweils zumindest eine LED zugeordnet ist (vgl. abhängiger Anspruch 2).According to a preferred embodiment, the operating light has a plurality of imaging elements, in particular in the form of reflector elements, wherein each imaging element in each case at least one LED is assigned (see dependent claim 2).
Eine andere bevorzugte Ausgestaltung der Operationsleuchte sieht vor, dass jede LED in einer Ebene angeordnet ist, welche die optische Achse der Operationsleuchte und die Hauptabstrahlrichtung der LED enthält und welche das der jeweiligen LED zugeordnete Reflektorelement symmetrisch teilt (vgl. abhängiger Anspruch 3).Another preferred embodiment of the surgical light provides that each LED is arranged in a plane which contains the optical axis of the operating light and the main emission of the LED and which symmetrically divides the reflector element associated with the respective LED (see dependent claim 3).
Eine andere bevorzugte Ausgestaltung der Operationsleuchte sieht vor, dass die LEDs in der Operationsleuchte verschiebbar abgestützt sind, insbesondere parallel zur optischen Achse der Leuchte verschiebbar (vgl. abhängiger Anspruch 4).Another preferred embodiment of the surgical light provides that the LEDs are slidably supported in the operating light, in particular parallel to the optical axis of the lamp slidably (see dependent claim 4).
Gemäß einer Variante der Erfindung wird direkt in der Operationsleuchte Licht zumindest einer kaltweißemittierenden LED und Licht zumindest einer warmweißemittierenden LED zumindest teilweise einander überlagert (gemischt), bevor das Licht ein optisches Abbildungselement in der Operationsleuchte erreicht (vgl. abhängiger Anspruch 5). Dieses Ausführungsbeispiel der Erfindung kann auch dahingehend ergänzt oder abgewandelt sein, dass die Überlagerung des kaltweißen und des warmweißen Lichtes auch direkt auf dem Abbildungselement erfolgt.According to a variant of the invention, directly in the operating light at least one cold white emitting LED and light of at least one warm white emitting LED are at least partially superimposed (mixed) before the light reaches an optical imaging element in the surgical light (see Claim 5). This embodiment of the invention can also be supplemented or modified to the effect that the superimposition of the cold white and the warm white light also takes place directly on the imaging element.
Die beiden vorstehend genannten Effekte können insbesondere dadurch erreicht werden, dass zumindest eine kaltweißemittierende LED und zumindest eine warmweißemittierende LED mit sehr geringem Abstand zueinander angeordnet werden, z. B. mit einem Abstand weniger als 5mm, insbesondere weniger als 3mm (vgl. abhängiger Anspruch 6).The two aforementioned effects can be achieved, in particular, by arranging at least one cold white emitting LED and at least one warm white emitting LED at a very small distance from each other, e.g. B. with a distance less than 5mm, in particular less than 3mm (see. Dependent claim 6).
Weitere Ausgestaltungen sind in den abhängigen Ansprüchen 7 bis 12 dargelegt.Further embodiments are set forth in the dependent claims 7 to 12.
Bevorzugt werden zumindest eine kaltweißemittierende LED und zumindest eine warmweißemittierende LED auf einem einzigen gemeinsamen Chip untergebracht.Preferably, at least one cold white emitting LED and at least one warm white emitting LED are accommodated on a single common chip.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnung näher erläutert. Es zeigt:
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Fig. 1 schematisch einen Schnitt durch eine Operationsleuchte mit drei LEDs und drei Reflektorelementen; -
Fig. 2 eine Draufsicht auf die Operationsleuchte gemäßFig. 1 von vorne in Richtung der optischen Achse; -
Fig. 3 ein System aus mehreren Operationsleuchten gemäß denFiguren 1 und 2 ; -
Fig. 4 ein anderes Ausführungsbeispiel einer Operationsleuchte schematisch im Schnitt und -
Fig. 5 eine Anordnung von drei LEDs relativ zu einer optischen Achse eines Leuchtelementes mit drei LEDs.
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Fig. 1 schematically a section through an operating light with three LEDs and three reflector elements; -
Fig. 2 a plan view of the surgical light according toFig. 1 from the front in the direction of the optical axis; -
Fig. 3 a system of several operating lights according to theFigures 1 and 2 ; -
Fig. 4 another embodiment of a surgical light schematically in section and -
Fig. 5 an arrangement of three LEDs relative to an optical axis of a light emitting element with three LEDs.
Die Operationsleuchte 10 enthält als optische Abbildungselemente drei Reflektorelemente 12, 14, 16, die sich im Wesentlichen lückenlos zu einem rundum geschlossenen Reflektor zusammenfügen.The
Beim Einsatz von drei Reflektorelementen 12, 14, 16 hat die Operationsleuchte eine 3-zählige Rotationssymmetrie um ihre optische Achse 18.When three
Jedem der Reflektorelemente 12, 14, 16 ist jeweils eine LED 20a, 20b bzw. 20c zugeordnet. Die LEDs 20a, 20b, 20c sind auf einem Sockel 22 montiert. Eine elektronische Steuerung (nicht gezeigt) ermöglicht, die einzelnen LEDs wahlweise variabel anzusteuern, insbesondere hinsichtlich der jeweils für eine LED eingesetzten Stromstärke.Each of the
Die genannten LEDs erzeugen entweder warmweißes Licht oder kaltweißes Licht, wobei in einer Operationsleuchte jeweils zumindest eine warmweißes Licht erzeugende LED und mindestens eine kaltweißes Licht erzeugende LED derart miteinander kombiniert werden, dass die Emissionen gemischt werden. Beim Ausführungsbeispiel gemäß den
Die einzelnen LEDs sind mit Schrauben 24 abnehmbar am Sockel 22 befestigt. Eine gemeinsame Grundplatte 26 stützt die Reflektoren 12, 14, 16 ab, die mittels Schrauben 28 an der Grundplatte 26 befestigt sind.The individual LEDs are detachably fastened to the
Mit Schrauben 30, 32 werden der Sockel 22 und die Grundplatte 26 mit den Reflektoren 12, 14, 16 zusammengehalten.With
Wie
Wie
Die optischen Abbildungselemente in Gestalt der Reflektorelemente sind so angeordnet und positioniert, dass die Strahlungen der drei LEDs 20a, 20b, 20c einander vor oder zumindest beim Auftreffen auf das Operationsfeld überlagern und gemischt werden.The optical imaging elements in the form of the reflector elements are arranged and positioned such that the radiations of the three
Bevorzugt ist der Farbwiedergabeindex Ra bei den eingesetzten LEDs bei jeder Farbtemperatur 90 oder besser.Preferably, the color rendering index Ra in the LEDs used is 90 or better at each color temperature.
Die Emissionen der LEDs 120, 130, 140 fallen auf einen Reflektor 150, der die einfallenden Emissionen auf das Operationsfeld 160 umlenkt. Insgesamt kann die Operationsleuchte beim Ausführungsbeispiel gemäß
Bei der Anordnung gemäß
Damit das Leuchtelement 110, dem die Lichtquellen 120, 130, 140 zugeordnet sind, als möglichst punktförmige Lichtquelle wirkt, ist der Abstand R2 nach Möglichkeit zu minimieren. Gute Ergebnisse werden mit einem Abstand R2 von 4 bis 5mm erzielt. Eine weitere Verbesserung ergibt sich mit einem Abstand von etwa 3mm oder kleiner. Bevorzugt ist der Abstand der Mittelpunkt der LEDs von der optischen Achse 18 gleich.In order that the
Die vorstehend beschriebenen LEDs weisen jeweils Konversionsschichten auf, um warmweißes Licht bzw. kaltweißes Licht, wie oben definiert, zu erzeugen. Durch Steuern der Stromstärke in den LEDs kann die Farbtemperatur der auf dem Operationsfeld erzeugten Bestrahlung eingestellt werden, z. B. im Farbtemperaturbereich von 3.500 Kelvin bis 5.500 Kelvin, je nach den Wünschen des Operateurs.The LEDs described above each have conversion layers to produce warm white light and cool white light as defined above. By controlling the current level in the LEDs, the color temperature of the operating field can be adjusted generated irradiation are adjusted, for. In the color temperature range from 3,500 Kelvin to 5,500 Kelvin, depending on the wishes of the surgeon.
Claims (12)
- Operating light (10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h; 100) with at least one optical imaging element (12, 14, 16; 150) and with at least two LEDs (20, 20a, 20b, 20c; 120, 130, 140), which produce light of different spectra, wherein the LEDs produce warm white and cool white spectra, wherein the at least one optical imaging element is a reflector element, wherein the reflector element is ellipsoidal, characterised in that the main beam direction (34a, 34b, 34c) of the LEDs forms an angle (α) of between 60° and 120° with the optical axis (18) of the operating light (10).
- Operating light according to claim 1, characterised in that several imaging elements (12, 14, 16) are provided and at least one LED (20; 20a, 20b, 20c) is assigned respectively to each of the imaging elements.
- Operating light according to claim 1 or 2, characterised in that each LED is arranged in a plane, which contains the optical axis of the operating light and the main beam direction (34) of the LED and which divides the reflector element (12, 14, 16) assigned to the respective LED symmetrically.
- Operating light according to one or more of the preceding claims, characterised in that the LEDs are supported displaceably in the operating light, in particular displaceably parallel to the optical axis of the light.
- Operating light according to one or more of the preceding claims, characterised in that the LEDs are arranged at such a small distance from one another that their different spectra produced are superposed on one another before they encounter an optical imaging element.
- Operating light according to claim 5, characterised in that respectively at least one LED producing a warm white spectrum and at least one LED producing a cool white spectrum are at a distance from one another that is smaller than approx. 3 mm.
- Operating light according to one or more of the preceding claims, characterised in that the LEDs are arranged in a common housing.
- Operating light according to one or more of the preceding claims, characterised in that the emissions produced by the LEDs have an adjustable intensity and that the intensity of the emission of each LED is variable by means of a regulating variable.
- Operating light according to claim 8, characterised in that the regulating variable assigned to the intensity of the emissions of the LED is an electric current.
- Operating light according to one or more of the preceding claims, characterised in that the intensity of the emissions of the LEDs is variable in such a manner that the superposed emissions of the LEDs encountering the optical imaging element have a predetermined spectrum.
- Operating light according to one of the preceding claims, characterised in that the colour rendering index (Ra) of the spectra produced at each colour temperature has a value of 90 or higher.
- Operating light according to one of the preceding claims, characterised in that a warm white spectrum has a colour temperature of 3,700 K or less, in particular 3,500 K or less, and that a cold white spectrum has a colour temperature of 5,300 K or greater, in particular 5,500 K or greater.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES11009153.5T ES2443957T3 (en) | 2011-11-18 | 2011-11-18 | Operation lamp |
EP11009153.5A EP2594843B1 (en) | 2011-11-18 | 2011-11-18 | Operating light |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11009153.5A EP2594843B1 (en) | 2011-11-18 | 2011-11-18 | Operating light |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2594843A1 EP2594843A1 (en) | 2013-05-22 |
EP2594843B1 true EP2594843B1 (en) | 2013-11-06 |
Family
ID=45047536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP11009153.5A Active EP2594843B1 (en) | 2011-11-18 | 2011-11-18 | Operating light |
Country Status (2)
Country | Link |
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EP (1) | EP2594843B1 (en) |
ES (1) | ES2443957T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102016011054A1 (en) * | 2016-09-12 | 2018-03-15 | Bartenbach Holding Gmbh | Luminaire set and spotlights for this |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8016470B2 (en) * | 2007-10-05 | 2011-09-13 | Dental Equipment, Llc | LED-based dental exam lamp with variable chromaticity |
EP1741974B1 (en) | 2005-07-05 | 2010-04-28 | Ingolf Diez, Simeon Medizintechnik | Operating lamp |
PL1785665T3 (en) * | 2005-11-14 | 2012-03-30 | Trumpf Medizin Systeme Gmbh & Co Kg | Surgical lamp |
DE102006040393B4 (en) * | 2006-08-29 | 2018-11-22 | Dr. Mach Gmbh & Co. Kg | LED surgical light |
US8201966B2 (en) * | 2007-01-18 | 2012-06-19 | Brandon Medical Company Limited | Illumination device |
EP1985912B1 (en) * | 2007-04-26 | 2017-06-07 | Frowein EZH GmbH | Operating light |
CN102128396B (en) * | 2011-03-19 | 2013-01-02 | 深圳市尚荣医疗股份有限公司 | LED (light-emitting diode) operation shadowless lamps with multiple lenses and method thereof for adjusting color temperature |
-
2011
- 2011-11-18 EP EP11009153.5A patent/EP2594843B1/en active Active
- 2011-11-18 ES ES11009153.5T patent/ES2443957T3/en active Active
Also Published As
Publication number | Publication date |
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EP2594843A1 (en) | 2013-05-22 |
ES2443957T3 (en) | 2014-02-21 |
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