EP1741974A2 - Operating lamp - Google Patents

Operating lamp Download PDF

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Publication number
EP1741974A2
EP1741974A2 EP06013830A EP06013830A EP1741974A2 EP 1741974 A2 EP1741974 A2 EP 1741974A2 EP 06013830 A EP06013830 A EP 06013830A EP 06013830 A EP06013830 A EP 06013830A EP 1741974 A2 EP1741974 A2 EP 1741974A2
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EP
European Patent Office
Prior art keywords
led
light
operating
optical axis
lamp
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.)
Granted
Application number
EP06013830A
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German (de)
French (fr)
Other versions
EP1741974A3 (en
EP1741974B1 (en
Inventor
Ingolf Diez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INGOLF DIEZ SIMEON MEDIZINTECH
Ingolf Diez Simeon Medizintechnik
Original Assignee
INGOLF DIEZ SIMEON MEDIZINTECH
Ingolf Diez Simeon Medizintechnik
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Publication date
Application filed by INGOLF DIEZ SIMEON MEDIZINTECH, Ingolf Diez Simeon Medizintechnik filed Critical INGOLF DIEZ SIMEON MEDIZINTECH
Priority to EP06013830A priority Critical patent/EP1741974B1/en
Publication of EP1741974A2 publication Critical patent/EP1741974A2/en
Publication of EP1741974A3 publication Critical patent/EP1741974A3/en
Application granted granted Critical
Publication of EP1741974B1 publication Critical patent/EP1741974B1/en
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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
    • 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
    • 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
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21W2131/202—Lighting for medical use for dentistry
    • 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
    • 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
    • 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 having at least one reflector element and at least one LED (light emitting diode) as a light source whose main emission forms an angle between 60 and 120 ° with an optical axis of the lamp. Furthermore, the invention relates to a light source for a surgical light.
  • An operating light with reflector elements and an LED, the main emission forms an angle of about 90 ° with an optical axis of the lamp, is from the US 2003/0227774 A1 known.
  • surgical light here stands for a lamp that is suitable for medical applications.
  • the surgical light according to the invention should therefore be particularly suitable for illuminating a surgical field and, for example, for illuminating an oral cavity (dental light).
  • the prior art knows surgical lights, in particular with gas discharge lamps.
  • the use of an LED as a light source 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.
  • the radiation characteristic of the LED (beam lobe) can be optimally utilized in cooperation with reflectors.
  • a particular advantage of the use of LEDs lies in 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 waste heat of the light sources and on the other hand, the heating in the operating field due to the infrared radiation components (which are low here) are kept very low.
  • the invention has for its object to provide a surgical light, which has a high life with high efficiency, little heat radiates, and in a compact design allows optimal illumination of a surgical field.
  • the optimal illumination of an operating field should include that an operator has an optimal view of the surgical procedure.
  • the invention also aims to provide a light source for such a surgical light.
  • the invention provides an operating light having at least one reflector element and at least one LED as a light source whose main emission forms an angle ( ⁇ ) between 60 ° and 120 ° with an optical axis of the lamp, wherein in the beam path between the LED and the reflector element, a luminescent layer is arranged, which luminesces in the color temperature range of 4000K to 4600K.
  • the invention also includes a light source for an operating light, in particular a surgical light of the aforementioned type, in which at least one LED is used, in the emitted radiation, a luminescent layer is used, in the color temperature range of 4000K to 4600K, in particular 4200K to 4500K and in particular luminescent at a color temperature of about 4300K.
  • a light source for an operating light in particular a surgical light of the aforementioned type, in which at least one LED is used, in the emitted radiation, a luminescent layer is used, in the color temperature range of 4000K to 4600K, in particular 4200K to 4500K and in particular luminescent at a color temperature of about 4300K.
  • the term "luminescence” is a generic term for in particular phosphorescence and fluorescence.
  • the luminescent layer thus receives the emitted radiation of an LED on the one side and then in turn emits radiation in a wavelength range which is different from the irradiated wavelength range.
  • the invention is based on the finding that an optimal illumination of a surgical field in a color temperature range of 4000K to 4600K is given.
  • the color temperature is 5000K with a permitted deviation plus / minus 200K. Also, there is proposed a color rendering index Ra of 90 or more. In the following, only one will be here mainly described operating light described, so a surgical light that radiates in the color temperature range of 4000K to 4600K.
  • the color temperature is 4300K with a permitted deviation of plus / minus 300K, preferably plus / minus 200K, and more preferably plus / minus 100K.
  • the inventive arrangement provides a color rendering index Ra of at least 90, preferably greater than 90. Moreover, an Im / W value of at least 60 lumens / watt is achieved, preferably even higher.
  • the invention makes it possible to work with a single LED, without the need to mix the radiation of different LEDs, such as in the EP 1 568 936 A1 , With a luminescent layer, a shift in the color temperature in the direction of requirements for dental lighting is also possible in a simple manner.
  • a preferred embodiment of the invention provides that a plurality of reflector elements are arranged along a closed circumferential curve.
  • the curve may be, for example, a circular path.
  • a further preferred embodiment of the invention provides that the reflector elements are substantially elliptical in a section also containing the optical axis of the lamp.
  • LEDs with a club-shaped radiation characteristic wherein the main radiation direction (ie the longitudinal axis of symmetry about which the lobe is rotationally symmetric) is perpendicular to the optical axis of the luminaire.
  • a simple embodiment of the invention provides that three reflector elements are arranged around the optical axis of the lamp around. It is also possible to combine two or more than three reflector elements into a substantially complete reflector which fills in 360 ° around the optical axis of the luminaire.
  • a further preferred embodiment of the invention provides that for adjusting the light field, in particular for focusing, the LEDs are slidably disposed within the lamp, preferably parallel to the optical axis of the reflector.
  • the LEDs are preferably arranged near or on the optical axis of the reflector.
  • the invention also teaches a system comprising a plurality of the operating lights described above, which may for example be arranged in a matrix-like manner in one field, or preferably also on a circumferential ring next to one another.
  • the light field can be adjusted in the operating field by pivoting or tilting the individual lights by the user in a simple manner.
  • the reduced power consumption in particular means that the lamp radiates less heat.
  • a high heat radiation has the particular disadvantage that it leads to high temperatures in the head field of the surgeon. It may also come to unwanted air currents due to the temperature gradient resulting from the heat radiation.
  • the invention enables a particularly flat design of the entire light and thereby occupies little space in the operating room.
  • the luminaire can be built in such a way that a climatic ceiling (laminar flow ceiling) in the operating room is not significantly disturbed by the operating light.
  • a particular embodiment of the invention provides the combination of the operating light (s) with a camera, which is used for a navigation system.
  • Cameras with navigation systems are known as such to the person skilled in the art.
  • the camera automatically always has the optimum position when the operating light is adjusted, and the overall arrangement is also space-saving and clear.
  • a sensor is integrated with the operating light or a system of a plurality of operating lights, which determines whether in an area in which usually a surgeon's head can appear (ie in the area between a surgical light and the surgical field, closer to the surgical light), an object (for example, the head of an operator) is located.
  • an object for example, the head of an operator
  • Such shading of the surgical field by the surgeon himself is obviously highly undesirable because the lighting conditions in the surgical field change.
  • a system of several operating lights can then be controlled so that those lights that are not shaded, are operated with slightly higher power to ensure a total temporally uniform at the surgical site lighting.
  • each individual operating light (or it can be summarized in each case some operating lights for this purpose) be equipped with a sensor of the type mentioned in order to determine whether this surgical light (or the combined group of operating lights) is shaded in the manner described.
  • sensors for example, known IR sensors or the like come into consideration, as they are known in particular by photographic cameras, etc.
  • LEDs make it possible, in particular in a simple manner when the described shadowing occurs, to adjust the luminosity of individual luminaires.
  • FIG. 1 shows an exemplary embodiment of an operating light 10 in the form of a section through the optical axis 18 of the luminaire.
  • Figure 2 shows a view of the surgical light from the front.
  • the surgical lamp 10 includes three reflector elements 12, 14, 16, which join together substantially seamlessly to a completely closed reflector.
  • the luminaire When using three reflector elements 12, 14, 16, the luminaire has 3-fold rotational symmetry about its optical axis 18.
  • Each of the reflector elements 12, 14, 16 has an LED 20a, 20b or 20c.
  • the LEDs 20a, 20b, 20c are mounted on a base 22. Details of the electrical supply of the LEDs are not shown in detail.
  • An electronic control (not shown) makes it possible to selectively control the individual LEDs.
  • the LEDs 20a, 20b, 20c emit white light in the illustrated embodiment.
  • the individual LEDs are detachably fastened to the base 22 with screws 24.
  • a common base plate 22 supports the reflectors 12, 14, 16, which are fastened by screws 28 to the base plate 26.
  • the main emission direction 34 of the LED 20 is perpendicular to the optical axis 18 of the luminaire.
  • the reflector element is elliptical in section according to FIG. 1, so that the radiation which is reflected by the reflector in accordance with the main emission direction 34 leaves the luminaire parallel to the optical axis 18.
  • the screw 32 can be rotated in order to move the base 22 with the LEDs 20a, 20b, 20c (see FIG. 2) axially.
  • the three reflector elements 12, 14, 15 are housed in a housing 36 in this embodiment.
  • the LEDs 20a, 20b, 20c are each arranged in a plane containing the optical axis 18 and also the respective main emission directions 34a, 34b, 34c of the individual LEDs.
  • these three planes are perpendicular to the plane of the drawing in the direction of the illustrated main emission directions 34a, 34b, 34c and thus share the respective reflector element 12, 14, 16 so that it can be reflected mirror-symmetrically at this level.
  • the individual reflector elements are, as I said, in the section of Figure 1 elliptical.
  • FIG. 3 shows a ring 40 to which ten lights 10a, 10b, 10c, 10d, 10e, 10f, 10g and 10h are regularly mounted.
  • This system of operating lights 10a,..., 10h enables optimal illumination of an operating field, the individual operating lights corresponding to the exemplary embodiments according to FIGS. 1 and 2.
  • the individual luminaires can be optionally and independently adjusted so that their optical axes are optimally aligned to the surgical field.
  • a camera for a navigation system used for the surgical procedure may be integrated (not shown).
  • one or more sensors can be integrated in the ring 40, which determine whether there is an obstacle in the area between the system of the lamps 10a,..., 10h and the surgical field, which leads to shading in the surgical field, for example the head of an operator.
  • sensors are known in principle from the field of photographic cameras in principle. If the sensor system detects such an obstacle and locates it sufficiently, then an electronic control which selectively activates the individual luminaires 10a,..., 10h can drive unshaded luminaires with somewhat more power than those luminaires which more or less shade be used to ensure the greatest possible uniform illumination at the surgical site.
  • Figures 4, 5 and 6 show details of the arrangement of an LED and a luminescent layer.
  • FIG 4 shows a section along the line AA of Figure 5.
  • a white emitting LED 20 is located in a ceramic housing 42. Into the ceramic housing 42 is embedded a luminescent layer 46. The electrical contacts 50 are used to power the LED 20.
  • a septumleitblech 48 with four arranged at the corners of a rectangle, outwardly facing arms is used for cooling.

Abstract

A lamp to illuminate surgery incorporates a light-emitting diode (20) with phosphorescent cover strip (46) with a color temperature in the range 4000K to 4600K. The lamp has a number of symmetrical reflector strips.

Description

Die Erfindung betrifft eine Operationsleuchte mit mindestens einem Reflektorelement und mindestens einer LED (lichtemittierenden Diode) als Lichtquelle, deren Hauptabstrahlrichtung einen Winkel zwischen 60 und 120° mit einer optischen Achse der Leuchte bildet. Weiterhin betrifft die Erfindung eine Lichtquelle für eine Operationsleuchte.The invention relates to a surgical light having at least one reflector element and at least one LED (light emitting diode) as a light source whose main emission forms an angle between 60 and 120 ° with an optical axis of the lamp. Furthermore, the invention relates to a light source for a surgical light.

Eine Operationsleuchte mit Reflektorelementen und einer LED, deren Hauptabstrahlrichtung einen Winkel von etwa 90° mit einer optischen Achse der Leuchte bildet, ist aus der US 2003/0227774 A1 bekannt.An operating light with reflector elements and an LED, the main emission forms an angle of about 90 ° with an optical axis of the lamp, is from the US 2003/0227774 A1 known.

Der Begriff "Operationsleuchte" steht hier für eine Leuchte, die für medizinische Anwendungen geeignet ist. Die erfindungsgemäße Operationsleuchte soll also insbesondere geeignet sein zu Beleuchtung eines Operationsfeldes und zum Beispiel auch zur Beleuchtung eine Mundinnenraumes (Dentalleuchte).The term "surgical light" here stands for a lamp that is suitable for medical applications. The surgical light according to the invention should therefore be particularly suitable for illuminating a surgical field and, for example, for illuminating an oral cavity (dental light).

Der Stand der Technik kennt Operationsleuchten insbesondere mit Gasentladungslampen. Die Verwendung einer LED als Lichtquelle 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 besonderer Vorteil der Verwendung 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 infraroten Strahlungsanteile (die hier gering sind) sehr gering gehalten werden.The prior art knows surgical lights, in particular with gas discharge lamps. The use of an LED as a light source 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. A particular advantage of the use of LEDs lies in 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 waste heat of the light sources and on the other hand, the heating in the operating field due to the infrared radiation components (which are low here) are kept very low.

Der Erfindung liegt die Aufgabe zugrunde, eine Operationsleuchte bereitzustellen, die bei hohem Wirkungsgrad eine hohe Lebensdauer aufweist, wenig Wärme abstrahlt, und bei kompakter Bauweise eine optimale Ausleuchtung eines Operationsfeldes ermöglicht. Die optimale Ausleuchtung eines Operationsfeldes soll beinhalten, dass für einen Operateur eine optimale Sicht auf das Operationsgeschehen gegeben ist. Die Erfindung hat auch das Ziel, eine Lichtquelle für eine solche Operationsleuchte bereitzustellen.The invention has for its object to provide a surgical light, which has a high life with high efficiency, little heat radiates, and in a compact design allows optimal illumination of a surgical field. The optimal illumination of an operating field should include that an operator has an optimal view of the surgical procedure. The invention also aims to provide a light source for such a surgical light.

Hierzu stellt die Erfindung bereit eine Operationsleuchte mit mindestens einem Reflektorelement und mindestens einer LED als Lichtquelle, deren Hauptabstrahlrichtung einen Winkel (α) zwischen 60° und 120° mit einer optischen Achse der Leuchte bildet, wobei im Strahlengang zwischen der LED und dem Reflektorelement eine Lumineszenzschicht angeordnet ist, die im Farbtemperaturbereich von 4000K bis 4600K luminesziert.For this purpose, the invention provides an operating light having at least one reflector element and at least one LED as a light source whose main emission forms an angle (α) between 60 ° and 120 ° with an optical axis of the lamp, wherein in the beam path between the LED and the reflector element, a luminescent layer is arranged, which luminesces in the color temperature range of 4000K to 4600K.

Die Erfindung beinhaltet auch eine Lichtquelle für eine Operationsleuchte, insbesondere eine Operationsleuchte der vorstehend genannten Art, bei der mindestens eine LED eingesetzt wird, in deren emittierte Strahlung eine Lumineszenzschicht eingesetzt ist, die im Farbtemperaturbereich von 4000K bis 4600K, insbesondere 4200K bis 4500K und insbesondere bei einer Farbtemperatur von etwas 4300K luminesziert.The invention also includes a light source for an operating light, in particular a surgical light of the aforementioned type, in which at least one LED is used, in the emitted radiation, a luminescent layer is used, in the color temperature range of 4000K to 4600K, in particular 4200K to 4500K and in particular luminescent at a color temperature of about 4300K.

Der Begriff "Lumineszenz" ist Oberbegriff für insbesondere Phosphoreszenz und Fluoreszenz. Die lumineszierende Schicht erhält also auf der einen Seite die emittierte Strahlung einer LED und emittiert dann ihrerseits Strahlung in einem Wellenlängenbereich, der verschieden ist von dem eingestrahlten Wellenlängenbereich.The term "luminescence" is a generic term for in particular phosphorescence and fluorescence. The luminescent layer thus receives the emitted radiation of an LED on the one side and then in turn emits radiation in a wavelength range which is different from the irradiated wavelength range.

Der Erfindung liegt die Erkenntnis zugrunde, dass eine optimale Ausleuchtung eines Operationsfeldes in einem Farbtemperaturbereich von 4000K bis 4600K gegeben ist.The invention is based on the finding that an optimal illumination of a surgical field in a color temperature range of 4000K to 4600K is given.

Im Falle einer Dentalleuchte liegt die Farbtemperatur bei 5000K mit einer zugelassenen Abweichung plus/minus 200K. Auch dort wird ein Farbwiedergabeindex Ra von 90 oder mehr vorgeschlagen. Im folgenden wird nur noch eine hier hauptsächlich angesprochene Operationsleuchte beschrieben, also eine Operationsleuchte, die im Farbtemperaturbereich von 4000K bis 4600K abstrahlt.In the case of a dental light, the color temperature is 5000K with a permitted deviation plus / minus 200K. Also, there is proposed a color rendering index Ra of 90 or more. In the following, only one will be here mainly described operating light described, so a surgical light that radiates in the color temperature range of 4000K to 4600K.

Bevorzugt liegt die Farbtemperatur bei 4300K mit einer erlaubten Abweichung von plus/minus 300K, bevorzugt plus/minus 200K und weiter bevorzugt plus/minus 100K.Preferably, the color temperature is 4300K with a permitted deviation of plus / minus 300K, preferably plus / minus 200K, and more preferably plus / minus 100K.

Dabei liefert die erfindungsgemäße Anordnung einen Farbwiedergabe-Index Ra von mindestens 90, bevorzugt größer als 90. Darüberhinaus wird ein Im/W-Wert von mindestens 60 Lumen/Watt erreicht, bevorzugt noch darüber.In this case, the inventive arrangement provides a color rendering index Ra of at least 90, preferably greater than 90. Moreover, an Im / W value of at least 60 lumens / watt is achieved, preferably even higher.

Die Erfindung erlaubt es mit einer einzigen LED zu arbeiten, ohne dass die Strahlung unterschiedlicher LEDs gemischt werden muss, wie zum Beispiel in der EP 1 568 936 A1 . Mit einer Lumineszenzschicht ist auch in einfacher Weise eine Verschiebung der Farbtemperatur in Richtung auf Anforderungen bei Dentalleuchten möglich.The invention makes it possible to work with a single LED, without the need to mix the radiation of different LEDs, such as in the EP 1 568 936 A1 , With a luminescent layer, a shift in the color temperature in the direction of requirements for dental lighting is also possible in a simple manner.

Weitere bevorzugte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.Further preferred embodiments of the invention are described in the dependent claims.

Eine bevorzugte Ausgestaltung der Erfindung sieht vor, dass mehrere Reflektorelemente entlang einer geschlossenen umlaufenden Kurve angeordnet sind. Die Kurve kann zum Beispiel eine Kreisbahn sein.A preferred embodiment of the invention provides that a plurality of reflector elements are arranged along a closed circumferential curve. The curve may be, for example, a circular path.

Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, dass die Reflektorelemente in einem auch die optische Achse der Leuchte enthaltenden Schnitt im wesentlichen ellipsenförmig sind.A further preferred embodiment of the invention provides that the reflector elements are substantially elliptical in a section also containing the optical axis of the lamp.

Besonders geeignet zum Einsatz in der erfindungsgemäßen Operationsleuchte sind LEDs mit einer keulenförmigen Abstrahlcharakteristik, wobei die Hauptabstrahlrichtung (also die Längs-Symmetrieachse, um welche die Keule rotationssymmetrisch ist) senkrecht zur optischen Achse der Leuchte steht.Particularly suitable for use in the surgical light according to the invention are LEDs with a club-shaped radiation characteristic, wherein the main radiation direction (ie the longitudinal axis of symmetry about which the lobe is rotationally symmetric) is perpendicular to the optical axis of the luminaire.

Eine einfache Ausgestaltung der Erfindung sieht vor, dass drei Reflektorelemente um die optische Achse der Leuchte herum angeordnet sind. Es können auch zwei oder mehr als drei Reflektorelemente zu einem im wesentlichen vollständigen, 360° um die optische Achse der Leuchte herum ausfüllenden Reflektor zusammengefügt werden.A simple embodiment of the invention provides that three reflector elements are arranged around the optical axis of the lamp around. It is also possible to combine two or more than three reflector elements into a substantially complete reflector which fills in 360 ° around the optical axis of the luminaire.

Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, dass zur Einstellung des Lichtfeldes, insbesondere zur Fokussierung, die LEDs innerhalb der Leuchte verschiebbar angeordnet sind, vorzugsweise parallel zur optischen Achse des Reflektors.A further preferred embodiment of the invention provides that for adjusting the light field, in particular for focusing, the LEDs are slidably disposed within the lamp, preferably parallel to the optical axis of the reflector.

Die LEDs werden bevorzugt nahe oder auf der optischen Achse des Reflektors angeordnet.The LEDs are preferably arranged near or on the optical axis of the reflector.

Die Erfindung lehrt auch ein System aus mehreren der vorstehend beschriebenen Operationsleuchten, die zum Beispiel matrixartig in einem Feld angeordnet sein können, oder bevorzugt auch auf einem umlaufenden Ring nebeneinander. Mit einer solche Anordnung mehrerer Operationsleuchten der beschriebenen Art kann das Lichtfeld im Operationsfeld durch Schwenken oder Neigen der einzelnen Leuchten vom Anwender in einfacher Weise eingestellt werden.The invention also teaches a system comprising a plurality of the operating lights described above, which may for example be arranged in a matrix-like manner in one field, or preferably also on a circumferential ring next to one another. With such an arrangement of a plurality of operating lights of the type described, the light field can be adjusted in the operating field by pivoting or tilting the individual lights by the user in a simple manner.

Durch die Verwendung von LEDs wird eine sehr hohe Lebensdauer des Leuchtmittels bei geringer Leistungsaufnahme erreicht. Gegenüber Halogenleuchtmitteln kann die Leistungsaufnahme bei gleicher Leuchtleistung im wesentlichen halbiert werden.By using LEDs a very long life of the lamp is achieved with low power consumption. Compared to halogen bulbs, the power consumption can be substantially halved with the same luminous power.

Die reduzierte Leistungsaufnahme hat insbesondere zur Folge, dass die Leuchte weniger Wärme abstrahlt. Eine hohe Wärmeabstrahlung hat insbesondere den Nachteil, dass sie zu hohen Temperaturen im Kopffeld des Operateurs führt. Es kann aufgrund der durch die Wärmeabstrahlung entstehenden Temperaturgradienten auch zu unerwünschten Luftströmungen kommen.The reduced power consumption in particular means that the lamp radiates less heat. A high heat radiation has the particular disadvantage that it leads to high temperatures in the head field of the surgeon. It may also come to unwanted air currents due to the temperature gradient resulting from the heat radiation.

Die Erfindung ermöglicht eine besonders flache Bauform der gesamten Leuchte und nimmt dadurch im Operationssaal wenig Platz ein. Insbesondere kann die Leuchte so gebaut werden, dass eine im OP-Saal vorhandene Klimadecke (Laminar Flow Decke) nicht wesentlich durch die Operationsleuchte gestört wird.The invention enables a particularly flat design of the entire light and thereby occupies little space in the operating room. In particular, the luminaire can be built in such a way that a climatic ceiling (laminar flow ceiling) in the operating room is not significantly disturbed by the operating light.

Eine besondere Ausgestaltung der Erfindung sieht die Kombination der Operationsleuchte(n) mit einer Kamera vor, die für ein Navigationssystem verwendet wird. Kameras mit Navigationssystemen sind als solche dem Fachmann bekannt. Indem die Kamera mit der Operationsleuchte über eine gemeinsame Abstützung integriert wird, hat die Kamera bei Einstellung der Operationsleuchte automatisch immer die optimale Position und darüber hinaus wird die Gesamtanordnung platzsparend und übersichtlich.A particular embodiment of the invention provides the combination of the operating light (s) with a camera, which is used for a navigation system. Cameras with navigation systems are known as such to the person skilled in the art. By integrating the camera with the operating light via a common support, the camera automatically always has the optimum position when the operating light is adjusted, and the overall arrangement is also space-saving and clear.

Eine andere Weiterbildung der Erfindung sieht vor, dass mit der Operationsleuchte bzw. einem System aus mehreren Operationsleuchten ein Sensor integriert ist, der ermittelt, ob sich in einem Bereich, in dem üblicherweise ein Kopf eines Operateurs auftauchen kann (also im Bereich zwischen einer Operationsleuchte und dem Operationsfeld, näher an der Operationsleuchte), ein Objekt (zum Beispiel der Kopf eines Operateurs) befindet. Eine solche Abschattung des Operationsfeldes durch den Operateur selbst ist offensichtlich höchst unerwünscht, da sich die Lichtverhältnisse im Operationsfeld verändern. Mit dem genannten Sensor kann dann ein System aus mehreren Operationsleuchten so gesteuert werden, dass diejenigen Leuchten, die nicht abgeschattet werden, mit etwas stärkerer Leistung betrieben werden, um insgesamt am Operationsort weitestgehend eine zeitlich gleichmäßige Beleuchtung zu gewährleisten. Dabei kann jede einzelne Operationsleuchte (oder es können jeweils einige Operationsleuchten hierzu zusammengefasst werden) mit einem Sensor der genannten Art ausgestattet sein, um zu ermitteln, ob diese Operationsleuchte (bzw. die jeweils zusammengefasste Gruppe von Operationsleuchten) in der beschriebenen Weise abgeschattet wird. Als Sensoren kommen zum Beispiel bekannt IR-Sensoren oder dergleichen in Betracht, wie sie insbesondere von fotografischen Kameras etc. bekannt sind.Another development of the invention provides that a sensor is integrated with the operating light or a system of a plurality of operating lights, which determines whether in an area in which usually a surgeon's head can appear (ie in the area between a surgical light and the surgical field, closer to the surgical light), an object (for example, the head of an operator) is located. Such shading of the surgical field by the surgeon himself is obviously highly undesirable because the lighting conditions in the surgical field change. With the said sensor, a system of several operating lights can then be controlled so that those lights that are not shaded, are operated with slightly higher power to ensure a total temporally uniform at the surgical site lighting. In this case, each individual operating light (or it can be summarized in each case some operating lights for this purpose) be equipped with a sensor of the type mentioned in order to determine whether this surgical light (or the combined group of operating lights) is shaded in the manner described. As sensors, for example, known IR sensors or the like come into consideration, as they are known in particular by photographic cameras, etc.

Die Verwendung von LEDs ermöglicht insbesondere in einfacher Weise beim Auftreten der beschriebenen Abschattungen ein Einstellen der Leuchtkraft einzelner Leuchten.The use of LEDs makes it possible, in particular in a simple manner when the described shadowing occurs, to adjust the luminosity of individual luminaires.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnung näher erläutert. Es zeigt:

Figur 1
schematisch einen Schnitt durch eine Operationsleuchte mit drei Reflektorelementen;
Figur 2
eine Draufsicht auf die Operationsleuchte gemäß Figur 1 von vorne in Richtung der optischen Achse;
Figur 3
ein System aus mehreren Operationsleuchten gemäß den Figuren 1 und 2;
Figur 4
schematisch einen Schnitt durch eine LED mit einer Lumineszenzschicht;
Figur 5
eine Draufsicht auf die Anordnung gemäß Figur 4 und
Figur 6
eine Ansicht der Anordnung gemäß Figur 4 von unten.
Embodiments of the invention will be explained in more detail with reference to the drawing. It shows:
FIG. 1
schematically a section through a surgical lamp with three reflector elements;
FIG. 2
a plan view of the surgical lamp according to Figure 1 from the front in the direction of the optical axis;
FIG. 3
a system of several operating lights according to Figures 1 and 2;
FIG. 4
schematically a section through an LED with a luminescent layer;
FIG. 5
a plan view of the arrangement of Figure 4 and
FIG. 6
a view of the arrangement of Figure 4 from below.

Figur 1 zeigt ein Ausführungsbeispiel einer Operationsleuchte 10 in Form eines Schnittes durch die optische Achse 18 der Leuchte. Figur 2 zeigt eine Ansicht der Operationsleuchte von vorne.FIG. 1 shows an exemplary embodiment of an operating light 10 in the form of a section through the optical axis 18 of the luminaire. Figure 2 shows a view of the surgical light from the front.

Die Operationsleuchte 10 enthält drei Reflektorelemente 12, 14, 16, die sich im wesentlichen lückenlos zu einem rundum geschlossenen Reflektor zusammenfügen.The surgical lamp 10 includes three reflector elements 12, 14, 16, which join together substantially seamlessly to a completely closed reflector.

Bei Einsatz von drei Reflektorelementen 12, 14, 16 hat die Leuchte 3-zählige Rotationsymmetrie um ihre optische Achse 18.When using three reflector elements 12, 14, 16, the luminaire has 3-fold rotational symmetry about its optical axis 18.

Jedes der Reflektorelemente 12, 14, 16 weist eine LED 20a, 20b bzw. 20c auf. Die LEDs 20a, 20b, 20c sind auf einem Sockel 22 montiert. Einzelheiten der elektrischen Versorgung der LEDs sind nicht näher dargestellt. Eine elektronische Steuerung (nicht gezeigt) ermöglicht, die einzelnen LEDs wahlweise anzusteuern. Die LEDs 20a, 20b, 20c strahlen beim dargestellten Ausführungsbeispiel Weißlicht ab.Each of the reflector elements 12, 14, 16 has an LED 20a, 20b or 20c. The LEDs 20a, 20b, 20c are mounted on a base 22. Details of the electrical supply of the LEDs are not shown in detail. An electronic control (not shown) makes it possible to selectively control the individual LEDs. The LEDs 20a, 20b, 20c emit white light in the illustrated embodiment.

Die einzelnen LEDs sind mit Schrauben 24 abnehmbar am Sockel 22 befestigt. Eine gemeinsame Grundplatte 22 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 base 22 with screws 24. A common base plate 22 supports the reflectors 12, 14, 16, which are fastened by screws 28 to the base plate 26.

Mit Schrauben 30, 32 werden der Sockel 22 und die Grundplatte 26 mit den Reflektoren 12, 14, 16 zusammengehalten.With screws 30, 32, the base 22 and the base plate 26 with the reflectors 12, 14, 16 are held together.

Wie Figur 1 zeigt, steht die Hauptabstrahlrichtung 34 der LED 20 senkrecht zur optischen Achse 18 der Leuchte. Das Reflektorelement ist beim dargestellten Ausführungsbeispiel im Schnitt gemäß Figur 1 ellipsenförmig, sodass die Strahlung, die gemäß der Hauptabstrahlrichtung 34 vom Reflektor reflektiert wird, die Leuchte parallel zur optischen Achse 18 verlässt. Durch Verschiebung der Position der LED 20 parallel zur optischen Achse 18 kann der Winkel, in dem die Strahlung die Leuchte verlässt, eingestellt werden. Hierzu kann die Schraube 32 gedreht werden, um den Sockel 22 mit den LEDs 20a, 20b, 20c (siehe Figur 2) axial zu verschieben.As FIG. 1 shows, the main emission direction 34 of the LED 20 is perpendicular to the optical axis 18 of the luminaire. In the exemplary embodiment illustrated, the reflector element is elliptical in section according to FIG. 1, so that the radiation which is reflected by the reflector in accordance with the main emission direction 34 leaves the luminaire parallel to the optical axis 18. By shifting the position of the LED 20 parallel to the optical axis 18, the angle at which the radiation leaves the luminaire can be adjusted. For this purpose, the screw 32 can be rotated in order to move the base 22 with the LEDs 20a, 20b, 20c (see FIG. 2) axially.

Wie Figur 2 zeigt, sind bei diesem Ausführungsbeispiel die drei Reflektorelemente 12, 14, 15 in einem Gehäuse 36 untergebracht. Die LEDs 20a, 20b, 20c sind jeweils in einer Ebene angeordnet, die die optische Achse 18 enthält und auch die jeweiligen Hauptabstrahlrichtungen 34a, 34b, 34c der einzelnen LEDs. Diese drei Ebenen stehen also in Figur 2 senkrecht auf der Zeichnungsebene in Richtung der dargestellten Hauptabstrahlrichtungen 34a, 34b, 34c und teilen somit das jeweilige Reflektorelement 12, 14, 16 so, dass es spiegelsymmetrisch an dieser Ebene reflektiert werden kann. Die einzelnen Reflektorelemente sind, wie gesagt, im Schnitt gemäß Figur 1 ellipsenförmig. In Umfangsrichtung (um die optische Achse 18 herum) sind sie jeweils schalenförmig, in Abhängigkeit von der Abstrahlungscharakteristik der LEDs so gestaltet, dass die reflektierte Strahlung in einer bestimmten Position der LEDs entlang der optischen Achse die Leuchte parallel oder in gewünschter Weise fokussiert verlässt.As Figure 2 shows, the three reflector elements 12, 14, 15 are housed in a housing 36 in this embodiment. The LEDs 20a, 20b, 20c are each arranged in a plane containing the optical axis 18 and also the respective main emission directions 34a, 34b, 34c of the individual LEDs. Thus, in FIG. 2, these three planes are perpendicular to the plane of the drawing in the direction of the illustrated main emission directions 34a, 34b, 34c and thus share the respective reflector element 12, 14, 16 so that it can be reflected mirror-symmetrically at this level. The individual reflector elements are, as I said, in the section of Figure 1 elliptical. In the circumferential direction (around the optical axis 18 around) they are each shell-shaped, depending on the emission characteristics of the LEDs designed so that the reflected radiation in a certain position of the LEDs along the optical axis leaves the lamp in parallel or in a desired manner.

Figur 3 zeigt einen Ring 40, auf den zehn Leuchten 10a, 10b, 10c, 10d, 10e, 10f, 10g und 10h in regelmäßigen montiert sind. Dieses System aus Operationsleuchten 10a, ...., 10h ermöglicht eine optimale Ausleuchtung eines Operationsfeldes, wobei die einzelnen Operationsleuchten den Ausführungsbeispielen gemäß den Figuren 1 und 2 entsprechen. Die einzelnen Leuchten können wahlweise und unabhängig voneinander so eingestellt werden, dass ihre optischen Achsen optimal auf das Operationsfeld ausgerichtet sind.FIG. 3 shows a ring 40 to which ten lights 10a, 10b, 10c, 10d, 10e, 10f, 10g and 10h are regularly mounted. This system of operating lights 10a,..., 10h enables optimal illumination of an operating field, the individual operating lights corresponding to the exemplary embodiments according to FIGS. 1 and 2. The individual luminaires can be optionally and independently adjusted so that their optical axes are optimally aligned to the surgical field.

In den Ring 40 kann eine Kamera für ein Navigationssystem, das für den chirurgischen Eingriff verwendet wird, integriert sein (nicht gezeigt).In the ring 40, a camera for a navigation system used for the surgical procedure may be integrated (not shown).

Weiterhin können in den Ring 40 einer oder mehrere Sensoren integriert sein, die ermitteln, ob sich im Bereich zwischen dem System der Leuchten 10a, ...., 10h und dem Operationsfeld ein Hindernis befindet, das zu einer Abschattung im Operationsfeld führt, zum Beispiel der Kopf eines Operateurs. Solche Sensoren sind zum Beispiel aus dem Bereich fotografischer Kameras prinzipiell bekannt. Ermittelt das Sensorsystem ein derartiges Hindernis und lokalisiert es dieses hinreichend, dann kann eine elektronische Steuerung, die die einzelnen Leuchten 10a, ...., 10h selektiv ansteuert, nicht abgeschattete Leuchten mit etwas mehr Leistung ansteuern als diejenigen Leuchten, die mehr oder weniger abgeschattet werden, um an der Operationsstelle eine weitestgehend gleichmäßige Beleuchtung zu gewährleisten.Furthermore, one or more sensors can be integrated in the ring 40, which determine whether there is an obstacle in the area between the system of the lamps 10a,..., 10h and the surgical field, which leads to shading in the surgical field, for example the head of an operator. Such sensors are known in principle from the field of photographic cameras in principle. If the sensor system detects such an obstacle and locates it sufficiently, then an electronic control which selectively activates the individual luminaires 10a,..., 10h can drive unshaded luminaires with somewhat more power than those luminaires which more or less shade be used to ensure the greatest possible uniform illumination at the surgical site.

Die Figuren 4, 5 und 6 zeigen Einzelheiten der Anordnung aus einer LED und einer Lumineszenzschicht.Figures 4, 5 and 6 show details of the arrangement of an LED and a luminescent layer.

Figur 4 zeigt einen Schnitt entlang der Linie A-A von Figur 5. Eine weiß abstrahlende LED 20 befindet sich in einem Keramikgehäuse 42. In das Keramikgehäuse 42 eingelassen ist eine Lumineszenzschicht 46. Die elektrischen Kontakte 50 dienen zur Versorgung der LED 20. Ein Wärmeleitblech 48 mit vier etwa an den Ecken eines Rechteckes angeordneten, nach außen weisenden Armen dient zur Kühlung.Figure 4 shows a section along the line AA of Figure 5. A white emitting LED 20 is located in a ceramic housing 42. Into the ceramic housing 42 is embedded a luminescent layer 46. The electrical contacts 50 are used to power the LED 20. A Wärmeleitblech 48 with four arranged at the corners of a rectangle, outwardly facing arms is used for cooling.

Claims (10)

Operationsleuchte (10) mit mindestens einem Reflektorelement (12, 14, 16) und mindestens einer LED (20; 20a, 20b, 20c) als Lichtquelle, deren Hauptabstrahlrichtung (34) einen Winkel (α) zwischen 60° und 120° mit einer optischen Achse (18) der Leuchte (10) bildet, wobei im Strahlengang zwischen der LED und dem Reflektorelement eine Lumineszenzschicht (46) angeordnet ist, die im Farbtemperaturbereich von 4000K bis 4600K luminesziert.Operation lamp (10) having at least one reflector element (12, 14, 16) and at least one LED (20; 20a, 20b, 20c) as a light source whose main emission direction (34) forms an angle (α) between 60 ° and 120 ° with an optical Axis (18) of the lamp (10), wherein in the beam path between the LED and the reflector element, a luminescent layer (46) is arranged, which luminesces in the color temperature range of 4000K to 4600K. Operationsleuchte nach Anspruch 1, dadurch gekennzeichnet, dass die Schicht (46) phosphoresziert.Operating light according to claim 1, characterized in that the layer (46) phosphoresced. Operationsleuchte nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Schicht (46) Phosphor enthält.Operating light according to one of claims 1 or 2, characterized in that the layer (46) contains phosphorus. Operationsleuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mehrere Reflektorelemente (12, 14, 16) vorgesehen sind und jedem der Reflektorelemente jeweils zumindest eine LED (20; 20a, 20b, 20c) zugeordnet ist.Operating light according to one of the preceding claims, characterized in that a plurality of reflector elements (12, 14, 16) are provided and each of the reflector elements is associated with at least one LED (20; 20a, 20b, 20c). Operationsleuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine LED in einer Ebene angeordnet ist, welche die optische Achse der Leuchte und die Hauptabstrahlrichtung (34) der LED enthält und welche das der jeweiligen LED zugeordnete Reflektorelement (12, 14, 16) symmetrisch teilt.Operating light according to one of the preceding claims, characterized in that the at least one LED is arranged in a plane which contains the optical axis of the luminaire and the main emission direction (34) of the LED and which the reflector element (12, 14, 16 ) divides symmetrically. Operationsleuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine oder mehrere LEDs weißes Licht abstrahlen.Operating light according to one of the preceding claims, characterized in that one or more LEDs emit white light. Operationsleuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die LED(s) (20; 20a, 20b, 20c) in der Leuchte verschiebbar abgestützt sind, insbesondere parallel zur optischen Achse (18) der Leuchte verschiebbar.Operating light according to one of the preceding claims, characterized in that the LED (s) (20; 20a, 20b, 20c) are slidably supported in the luminaire, in particular displaceable parallel to the optical axis (18) of the luminaire. Operationsleuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schicht (46) in einem Farbtemperaturbereich von 4100K bis 4500 K luminesziert.Surgical lamp according to one of the preceding claims, characterized in that the layer (46) luminesces in a color temperature range of 4100K to 4500 K. Lichtquelle für eine Operationsleuchte (10) mit mindestens einer LED (20; 20a, 20b, 20c), dadurch gekennzeichnet, dass vor der LED eine Lumineszenzschicht (46) angeordnet ist, die im Farbtemperaturbereich von 4000K bis 4600K luminesziert.Light source for an operating light (10) with at least one LED (20; 20a, 20b, 20c), characterized in that a luminescent layer (46) is arranged in front of the LED which luminesces in the color temperature range of 4000K to 4600K. Lichtquelle nach Anspruch 9, dadurch gekennzeichnet, dass die Schicht (46) im Farbtemperaturbereich von 4200K bis 4500K luminesziert.Light source according to claim 9, characterized in that the layer (46) luminesces in the color temperature range of 4200K to 4500K.
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