EP2469158B1 - Dental treatment light - Google Patents

Description

The present invention relates to a medical, in particular dental treatment light.

For example, in the case of surgeries or dental procedures, to ensure optimal medical treatment, it is essential to properly illuminate the treatment site. Different boundary conditions on the one hand to protect the patient but on the other hand also to optimize the illumination are to be considered, which have found their way into different standards. For example, these standards prescribe the shape of the light field, a certain minimum value of the color rendering index of the illumination and a minimum value of the illumination intensity.

Nevertheless, within the framework of the standards and in special cases also a large number of application requirements must be taken into account so that, from the perspective of the luminaire manufacturer, a large number of luminaire models must be provided in order to enable a competitive adaptation to customer requirements. For example, to achieve a sufficient contrast ratio, it may be necessary to adapt the maximum available illuminance to the spatial conditions of a treatment room. Furthermore, a preference for the positioning of the treatment light can cause a predetermined light path from the luminaire to the object plane, which requires, for example, a special positioning of the luminous means.

A further boundary condition especially for the medical use of luminaires is moreover that the luminaire must meet special hygiene requirements. Therefore, it is desirable that the luminaire allows easy cleaning.

The US 2008/0238338 A1 shows a lamp with individual LED modules. Within the lamp housing, a grid-shaped holder element is provided which has corresponding receptacles for inserting the light sources. The Single modules are not arranged on a common support having mounting surfaces for the modules.

The EP 1568 936 A1 shows an operating light and a method for illuminating an operation site. The WO 2010/017481 , A2 shows an LED light, which is to be used in medical examinations. The WO 2005/006818 A1 also describes a LED lighting for medical use. A concept for dissipating heat efficiently is not presented in the three documents mentioned above.

The WO 03/072995 A1 Finally, illumination also is shown for surgical operations, but it is not described how heat is dissipated from several adjacent light sources.

Object of the present invention is therefore to improve a corresponding medical, especially a dental treatment light, and to allow easy adaptability to different optical conditions or customer requirements, with a hygienically advantageous design is selected. Furthermore, the heat occurring during operation should be dissipated efficiently.

This object is achieved by a luminaire with the features of claim 1. Further developments of the invention are the subject of the dependent claims.

According to the invention, the medical or dental treatment light has a housing and a plurality of LED light sources. The LED light sources are reversibly releasably connected to energy supply means for the LED light sources. Further, the LED light sources are arranged on a common carrier having mounting surfaces for the LED light sources, connected to the housing and designed for heat dissipation of the LED light sources.

Several LED light sources can be arranged in such a way that can be dispensed with the use of large-area reflectors - as is common in contrast with dental treatment lights with non-semiconductor-based light sources. The use of LED light sources thus achieves a degree of freedom in the arrangement of the light sources, which offers significant advantages in terms of the adaptability of the light emission compared with reflector-based luminaires. LED light sources, which are also reversibly releasably connected to their operation with energy supply means, continue to increase this adaptability. Thus, the possibility is created, one or more LED light sources, preferably all arranged in the housing LED light sources to replace in a simple manner and adapt to the application requirements. In particular, each of the LED light sources may comprise corresponding connection means allowing a reversibly detachable connection with power supply means.

In addition, the power supply means are preferably arranged within the housing. Thus, it is possible in a simple manner to achieve adaptation to different LED light sources, in particular to a modified number of LED light sources, with connection means arranged completely within the housing.

In a preferred embodiment, the light sources are connected in series with each other. This combines a number of advantages. For example, such a reduced length of the power supply path can be achieved in an annular arrangement for power management. Additional LED bulbs can be easily integrated into the annular power management arrangement since only current routing paths to adjacent LED light sources need to be closed. In addition, such a slight imprinting of the size of the supply current in the annular arrangement for current conduction is possible, so that - in the case of an extension of the treatment light - for example, more complicated adjustments to the energy supply means can be effectively bypassed.

In one development of the invention, it can be provided that the LED light sources have bridging means which are designed to continue the connection circuit in the event of a failure of an LED light source. This allows, for example, to avoid the interruption of a series connection, so that the remaining functional LED light sources are still connected to the power supply means.

Boundary conditions for an optimal medical lighting device are documented in a number of standards, the most important of which for dental lighting Purposes at the moment is the EN ISO 9680; this standard specifies an optimal light field for treatment in an object plane, which preferably includes the location of the medical treatment.

In a development of the invention, the LED light sources illuminate a common light field in an object plane, preferably exclusively the common light field.

The mounting surfaces of the support for the LED light sources are preferably arranged in such a way that each of the LED light sources is aligned to a common center of a common light field in an object plane, so that in particular the optical axis of the respective LED light sources to a common center of Illuminated field points.

In one development of the invention, each of the LED light sources is designed to fully illuminate a common light field. In this case, too, the LED light sources can preferably be designed to illuminate exclusively the common illuminated field.

With this embodiment, for example, the advantage is achieved that the light sources can be easily, without special measures for optical adjustment, arranged on the support element, while the arrangement within the housing is predetermined by the support member; a predefined type of arrangement of the LED light sources is thus given, thereby it can be ensured that in each case a standard-compliant light field is generated.

In connection with the possibility provided according to the invention of reversibly releasably connecting the LED light sources to energy supply means, it is furthermore possible to change the maximum possible illumination of the light field in a rapid manner, so that an extremely flexible adaptation to customer requirements is provided.

As already mentioned, it is particularly favorable that the carrier is designed for heat dissipation of the LED light sources. Preferably, the heat dissipation between the LED light source and the carrier is carried out with an adhesive film.

In particular, this makes it possible to connect the light sources on the one hand reversibly detachable with the carrier element, in which case the adhesive film may need to be replaced after a few loosening and fastening operations. On the other hand, this can also cause the compensation of manufacturing tolerances of the support element.

For example, the adhesive film could have a suitably chosen thickness, preferably in a range between 0.2 and 3 mm. In addition, the adhesive film also supports the electrical insulation of the LED light sources with respect to the housing, so that corresponding standards with a smaller footprint, for example, for creepage distances for electrical insulation, can be complied with.

However, the invention is not limited to heat dissipation with an adhesive sheet. Furthermore, recordings for thermal pastes or liquids can be provided, for example, on the carrier, which further enable a reversibly detachable connection with the carrier. For example, the LED light source could then be inserted into a well formed on the support, which simultaneously receives a means for promoting heat dissipation. For example, this could be a thermal paste or a corresponding liquid, for example, increases the contact surface of the LED light source.

Furthermore, it can be provided, for example, that the carrier has fastening means for the power supply means of the LED light sources. Thus, the carrier simultaneously realizes a compact arrangement of energy supply means, which are preferably also designed for heat dissipation via connection means of the power supply.

In addition, the fastening means could be designed so that a cascadable arrangement of energy supply means is realized. For example, the carrier could comprise a plurality of, preferably similar fastening means, which are adapted to connect a plurality of independent power supply means for the LED light sources with the carrier.

In a further development of the inventive concept, the LED light sources are designed in several parts. Preferably, the LED light sources comprise optical means. Particularly advantageous, the LED light sources on a circuit board, which includes connection means. In particular, these may be connectors, particularly preferred for flex conductors. In this case, it can preferably be provided to design the connection means, in particular plug-in connectors, in such a way that a series connection is provided with each of the reversibly detachable LED light sources.

In one exemplary embodiment, the LED light sources have a plurality of LED illuminants and are preferably designed as substantially punctiform light sources or as light sources with the smallest possible area. In a further development of the invention, the LED lighting means are designed to emit light in each case with mutually different color locations.

In this case, it may be provided that LED lamps are connected in series with a light emission of a particular color locus, that is, a plurality of series circuits for LED lamps of different color is formed, each LED illuminant of a particular color locus with each other and reversibly detachable with the Connect energy supply means.

In a preferred embodiment of the invention, a plurality of LED lighting means of the LED light sources are arranged on a common substrate, which is designed for heat dissipation. For example, it may be a metal substrate. Preferably, the substrate may be formed so that a positive connection with the carrier is achieved. In particular, the metal substrate can also be designed to support an increase in the contact area, for example in conjunction with an adhesive film, thermal compound or coolant.

Furthermore, it can be provided in a development of the inventive concept that the power supply means are designed to control or to control the light intensity of the LED lighting means. Preferably, the control or control for lamps of different color locations is independent of each other.

In addition, the design of the treatment light with LED bulbs, brings with it further advantages. As a rule, a housing for the treatment light can be chosen to be relatively compact. In this compact housing, it is still possible, due to the - as compared to conventional bulbs - low heat dissipation to maintain a favorable for the operation of the LED bulbs temperature without an air flow must be directed into the housing.

In a further development of the invention, the treatment lamp has a housing which is substantially completely closed and preferably comprises a completely closed cover of the light exit surface, which is designed, for example, in one piece. For example, the cover may be provided with a scratch-resistant nano- or silicate coating.

Preferably, the cover is configured autoclavable, for example, maximum dimensions of the cover could take this into account so that one-piece sections of the cover do not exceed a maximum dimension predetermined by conventional cleaning devices. This is the case, for example, for one-piece areas which measure less than 21 × 30 cm.

Thus, an optimally designed under hygienic aspects treatment light can be realized, which has an easy to clean surface and does not cause additional contamination of the ambient air during operation.

Here, a substantially completely closed housing is to be understood that the housing is completely closed except for openings for lines of the power supply, openings for communication means, display means or controls. In particular, it is provided in this case to arrange the LED light sources completely within the closed housing.

To further improve the hygienic properties, for example, the operating elements of the treatment light can be removed. The controls could be designed autoclavable. More preferably, a plurality of mounting positions could be provided for attaching the controls, so that beyond a flexible use of the lamp can be achieved by varying the mounting position.

In a development of the invention, the treatment light comprises operating elements which can be actuated without contact. This may be, for example, motion-sensitive sensor means, which are preferably designed to switch one or more of the LED light sources on or off. Furthermore For example, the contactless control of a dimming of the light output of the treatment light could be provided.

Furthermore, the treatment light, for example, have removable handles or mirrors, which may preferably be designed to improve the hygiene properties of the lamp also autoclavable. In any case, a removability requires an improvement of the cleaning options and also can be provided to also arrange different mounting positions for handles or mirrors, so that also increased flexibility in adapting to customer requirements and in the use of the treatment light is achieved.

Furthermore, the treatment light can have a camera or an orientation laser. This may, in the case of difficult treatments, provide the opportunity to obtain an enlarged view of the treatment site as a live view; and furthermore, for example, it may also be provided for documentation or proof purposes to capture individual images during the treatment. The exact centering of the treatment light can be improved and controlled, for example, by the orientation laser.

Fig.1

ein in Detailansicht dargestelltes Ausführungsbeispiel einer Behandlungsleuchte mit mehrteilig ausgestalten Lichtquellen;

Fig.2

eine schematische Querschnittansicht bzw. eine Aufsicht auf eine erfindungsgemäße Behandlungsleuchte;

Fig.3

eine Detailansicht der Anbringung mehrerer LED-Lichtquellen auf einem Träger in einer Explosionsansicht;

Fig.4

eine Detailansicht einer Rückschale eines Leuchtengehäuses, mit LED-Lichtquellen auf einem mit dem Gehäuse verbindbaren Träger; und

Fig.5

ein Ausführungsbeispiel für die Anbringung von Spiegeln bzw. Griffen an der Behandlungsleuchte.

The invention will be explained in more detail with reference to the accompanying drawings, wherein like elements in all representations are provided with the same reference numerals. Show it:

Fig.1

an illustrated in detail embodiment of an operating light with multi-part designed light sources;

Fig.2

a schematic cross-sectional view and a plan view of a treatment lamp according to the invention;

Figure 3

a detailed view of the attachment of multiple LED light sources on a support in an exploded view;

Figure 4

a detailed view of a rear shell of a lamp housing, with LED light sources on a connectable to the housing carrier; and

Figure 5

an embodiment for the attachment of mirrors or handles on the treatment light.

Medical, in particular dental treatment lamps are designed to optimally illuminate the treatment site and therefore produce a spatially limited light field in an object plane. The spatial limit is determined by a prescribed decrease in the illumination intensity in the edge area, as provided, for example, in the standard EN ISO 9680. However, apart from the specifications of the standard, in many cases it is necessary to adapt the treatment light to the needs of the user.

In the FIG. 1 schematically illustrated treatment light allows this in a simple manner.

According to the invention, the treatment light has a plurality of LED light sources 200, which are reversibly detachably connected to energy supply means for operating the LED light sources 200. The exemplary embodiment shows three LED light sources 200 which are arranged in an associated, in this case trough-shaped housing 500 and it can be provided that further LED light sources can be mounted in the housing 500. In particular, at least one further mounting position in the housing 500, for example with fastening means, can be provided for this purpose. The housing may be made of a plastic material, for example of glass-fiber reinforced plastic, but also for example of metal. The complete production of a uniform material, preferably plastic, however, offers the possibility to dispense with the connection of different materials and thus to improve the dimensional stability of the housing over a wide temperature range.

The inventive design of the treatment light makes it possible, for example, to vary the number of LED light sources 200 and thus to adapt the total light output of the treatment light to the needs of the user. In addition, the embodiment of the invention also realizes the idea of the installation position of the LED light sources 200 in a particularly efficient manner and to modify it; Thus, for a given total light output by changing the mounting position of the angle of incidence can be varied to a spatially limited light field in an object plane, so possibly shading can be avoided.

For example, at least one of the LED light sources 200 is reversibly detachably connected to the power supply means, but preferably, each of the LED light sources 200 is reversibly detachably connected to the power supply means.

In an advantageous embodiment of the invention, the plurality of LED light sources 200 are connected in a series circuit with the power supply means.

Further conducive to an efficient embodiment of the adaptation possibilities of the treatment light is provided in this embodiment, that the power supply means of the treatment light are disposed within the housing 500.

In a preferred embodiment, the LED light sources 200 are designed to illuminate a common light field in an object plane, for example, exclusively the common light field, which preferably represents the spatially limited light field of the treatment plane.

For ease of assembly, the LED light sources are arranged on a support 510 in this embodiment. This preferably defines the installation position of the LED light sources 200 in the housing 500 and is preferably connected to the housing 500, for example reversibly detachable. In a preferred development, the carrier 510-but also preferably the housing 500-has corresponding fastening means.

The carrier 510 may be made, for example, of metal, preferably aluminum, but also of plastic, preferably glass-fiber-reinforced plastic.

Further, the carrier 510 may include attachment means for attaching the LED light sources 200. In the embodiment according to FIG. 1 a reversibly detachable connection of the LED light sources 200 to the carrier 510 is provided. For this purpose, the carrier has holes, so that the connection of the LED light sources 200 with the carrier 510 can be done for example by means of screws, however, corresponding locking means may be provided, which engage for example with the holes. In addition, the carrier also includes fixing pins which are adapted to engage with the LED light sources 200 and thus determine the orientation of the LED light sources 200 by means of corresponding openings. With the help of openings and pins, for example, a coding can be realized, which prescribes or excludes the mounting of certain LED light sources 200 at a predetermined installation position. In a further development, therefore, the fastening means for at least two LED light sources 200 differ, preferably the arrangement of the pins is different for at least two of the LED light sources 200.

In the illustrated embodiment, the carrier 510 has attachment surfaces 515 for the LED light sources 200 arranged in such a manner that each of the LED light sources 200 is aligned with a common center of a common light field in an object plane. The exemplary embodiment also provides that the attachment surfaces 515 be designed to connect the LED light sources 200 in a form-fitting manner to the carrier.

A preferred embodiment of the inventive concept provides that the carrier 510 is designed for heat dissipation of the LED light sources 200. According to FIG. 2 In addition, for example, it is provided to arrange a heat dissipation-promoting adhesive film 530 between the LED light source 200 and support 510. With the help of the adhesive film 530 on the one hand the possibility is created to realize an excellent heat coupling between the carrier 510 and the LED light source 200. On the other hand, even with a suitable choice of its thickness, the adhesive film may be designed to cause a form-locking connection between the carrier 510 and the LED light source 200. In particular, so possible manufacturing tolerances of carrier 510 and LED light source 200 can be compensated. Therefore, the adhesive film 530 preferably has a thickness of between 0.01 and 5 mm, more preferably in the range between 0.2 and 3 mm. At the same time, the possibility of a substantially reversibly detachable connection between carrier 510 and LED light source 200 is not influenced by the use of an adhesive film. In particular, it can be assumed that the adhesive film 530 is to be renewed only after a series of connection or release operations, so that for the application described - the adaptation of the light emission of a treatment lamp - this compound is to be regarded as reversibly detachable.

Particularly advantageously, the housing 500 can then also be designed for heat dissipation, in particular, this can relate to a rear shell of the housing 500 described below. The carrier 510 could then, for example, be designed such that it has corresponding apertures for insertion of the LED light sources 200. Preferably, the carrier 510 is then dimensioned so that the LED light sources 200 can enter into heat-dissipating contact with the housing 500. For example, a corresponding adhesive sheet 530 could make the heat dissipating contact with the housing 500. A corresponding in FIG. 3 shown embodiment will be described in more detail below.

According to the in FIG. 2 shown embodiment of the invention, the LED light sources 200 are formed in several parts. In this case, the LED light sources 200 have a plurality of LED lighting means 100, which can be arranged, for example, on a common substrate. Preferably, this substrate is designed for common heat dissipation of the LED bulbs 100 and may be made of metal, for example. Furthermore, in this exemplary embodiment, the LED lighting means 100 are connected to a circuit board 210. In this advantageous embodiment, the board 210 has a recess for the common substrate of the LED bulbs 100, so that this substrate is directly facing the carrier 510 and, for example by means of the adhesive film 530 with the carrier 510 is connectable.

The exemplary embodiment shows an FR4 board ("flame retardent" of class 4), which has a cutout for limiting the opening angle of a light cone emanating from the LED lighting means 100. This cutout is formed in the embodiment shown as a continuation of the recess for the common substrate of the LED bulbs 100 and selected so that the Aperture angle is matched to associated optical means 220 of the LED light source 200. For example, the opening angle could be selected such that only one associated lens is irradiated by the light emission of the LED illuminant 100. In the illustrated embodiment, the opening angle is preferably between 170 ° and 20 °, but more preferably between 150 ° and 110 °.

In one embodiment of the invention, parts of the LED light source 200 are blackened or darkened, for example, to attenuate stray light. In particular, this can be the case in the field of milling.

The optical means 220 may preferably be lenses or an array of lenses, for example, disposed directly on the board 210, such that an LED light source 200 may be considered as a coherent and preferably terminated assembly. In this way, it is particularly easy to integrate the light emission of the LED light source 200 into the optical concept of the treatment light, since corresponding optical means 220 are also introduced into the treatment light simultaneously with the assembly of an LED light source 200.

According to a development, not shown, it may also be provided that the optical means comprise an n-edged prism designed as a light guide, so that collimation and color mixing of the light emitted by the LED light sources 100 are achieved at the same time; the number of folding edges "n" is preferably between five and seven. In this case, the LED lighting means can be connected directly to the optical means, so in particular arrive in contact with corresponding coupling surfaces of the prism. These can be realized, for example, as a beam-expanding optics. Preferably, the prism is designed to project the light emerging from the prism onto a common plane. This plane can then serve as a coupling-in surface for a further beam-expanding optical system, for example realized by lenses which generate a standard-compliant, spatially limited light field in an object plane. However, this beam-expanding optics could also be arranged directly on the light exit surface of the prism or be connected directly to the prism.

Preferably, one, particularly preferably each of the LED light sources 200 has connection means 215, which are designed to realize the reversibly detachable connection to the energy supply means 520. In the embodiment of FIG. 2 For this purpose, a connector is provided on the circuit board 220, which is designed, for example, at least two poles for the power supply of the associated LED light source 200.

In a preferred embodiment, the connection means 215 are designed to connect a plurality of circuits of the LED light sources 200 to the power supply means 520.

For example, it can be provided that the LED light source 200 has a plurality of LED lighting means 100, which has a light emission of mutually different color locations. In this case, it may then be provided, for example, that the connection means 215 in each case for LED lighting means 100, which have a certain type of light emission, realize an independent electric circuit which is connected to the energy supply means 520. Preferably, a common connector can be provided for this, but the use of multiple connectors within the scope of the inventive concept is by no means excluded. Particularly preferably, the circuits are each designed for LED lighting means 100 with a certain type of light emission, which has, for example, a common color locus, as series circuits.

In a further development of the inventive idea, the LED light sources 200 are designed as essentially punctiform light sources which, for example, comprise a plurality of LED light sources 100, which can have mutually different light emission, for example a different color locus. The term "essentially" is to be understood here as meaning that a centrally symmetrical arrangement (group) of a plurality of LEDs results, which only has deviations from the central symmetry caused by the dimensions of individual LED illuminants 100.

In one embodiment, the energy supply means 520 can then be designed to regulate the light intensity of the LED lighting means 100. Thus, a number of advantages can be achieved, which are particularly important for the dental use of the treatment light of importance.

For example, it may be provided to dim particular LED light sources 100, preferably in such a way that certain color components can be regarded as being virtually filtered out of the spectrum of the light output of the treatment lamp. For example, these may be wavelength components in the blue (<520 nm), violet or in the UV spectral range, which accelerate the curing of dental treatment materials. By dimming or hiding these wavelength components can thus be achieved an advantageous curing time without a mechanical filter would have to be introduced into the beam path of the treatment light. Fading out of these wavelength components can also be realized, for example, by selective switching off of individual LED lamps 100.

In addition, it is also conceivable to control or regulate the color location of the LED light source 200 or the total light output of the treatment light. In particular, for purposes of color matching, it may be necessary to provide a daylight-like light output. For this purpose, it may be provided that the treatment lamp has corresponding sensor means, with the aid of which an adjustment of the light output of individual LED light sources 200 or the treatment lamp with a desired value, preferably the color location, can be performed. For example, these may be optical sensors or color sensors, preferably one or more photodiode (s) or RGB or RGBW sensors, which are designed, for example, to each other different wavelength components of the emitted light spectrum or the light in the object plane to capture. In addition, temperature detection means could also be provided, for example, in order to preferably determine a measured variable which is proportional to the light emission of the LED lighting means 100 and which can serve to control or regulate the light output. In a further development, an NTC resistor ("negative temperature coefficient") may be provided for this purpose.

The energy supply means 520 are then preferably designed to evaluate the deviation from a desired value of the energy supply for LED light sources 100 of different color locations and to adapt the light output of the LED light source 200 by controlling and regulating the energy supply on the basis of a measured value provided by sensor means. This realizes the control or regulation of the treatment light, for emitting light of a particular color location, but beyond that also the intensity of the light output. Thus, the light output of the treatment light, while controlling the intensity of the total light output, be set to a specific color location, for example, represents a particularly daylight-like light output and has a corresponding color rendering index. For example, it may be particularly advantageous to increase the intensity of the light output while maintaining a predetermined color location in a color balance of dental implants.

It may then be provided, for example, to arrange the temperature detection means or the NTC resistors directly on the circuit board of the LED light sources 200. The connection of these means with energy supply means 520 is preferably also formed reversibly detachable.

The control or regulation of the light intensity of the LED lighting means 100 preferably takes place via pulse width modulation of the power supply. In particular, several, preferably all LED light sources 200 may be connected to pulse-width-modulated energy supply means 520, particularly preferably in series connection.

An in FIG. 3 illustrated training shows a treatment lamp with the features of the invention. Preferably, the treatment lamp has a substantially completely closed housing. This embodiment is particularly conducive to the maintenance of a hygienic condition of the treatment light. In particular, the absence of an introduction of cooling air into the interior of the housing means a drastic advantage for the cleaning cycle of the treatment lamp, since it is practically impossible that dust or dirt particles in the interior of the treatment light can be introduced. For example, it could also be provided that the housing has corresponding seals, so that, for example, the penetration of disinfectant is avoided in the interior of the treatment light.

A trough-shaped rear shell 580 of the housing 500 is preferably reversibly detachably connected to a substantially transparent cover 570 of a light exit surface. In particular, it proves to be advantageous if the cover 570 is detachably connected to the housing without tools, for example by means of a latching connection. In addition, however, this does not exclude the use of screw connections, as will become apparent below. Particularly preferred are seals between the cover 570 and the back shell 580 of the housing attached.

In one embodiment, the cover 570 of the light exit surface is made in one piece. In addition, the cover 570 encloses substantially all of the patient facing surface of the treatment light. Particularly advantageously, integrally formed portions of the cover 570 have dimensions that allow a treatment in a dental autoclave. Favor, the cover therefore has a surface measure smaller than 21cm x 30cm. In addition to a particularly favorable access to the LED light sources 200, the treatment light is extremely easy to clean in this embodiment. In particular, it can be expected in this exemplary embodiment that the substantial contaminants occur in the region of the cover 570 of the light exit surface of the treatment lamp. Furthermore, an independent cleaning possibility of the cover 570 is given by other components of the treatment light. For example, a corresponding cleaning method can be supported by an autoclavable embodiment of the cover 570.

In addition, it can also be provided to improve the access possibilities to the LED light sources 200 in that the cover 570 of the light exit surface of each LED light source 200 assigns an opening which is closed by a respective separately removable cover. For unused mounting positions of LED light sources 200 then, for example, a special blind cover may be provided.

In the further education of the FIGS. 4a and 4b For example, the treatment light has a trough-shaped back shell 580 of the housing 500, wherein this support arms 575 comprises attachment points for a likewise trough-like cover 570 of the light exit surface. The trough-shaped cover 570 of the light exit surface surrounds the patient-facing portions of the treatment light substantially completely. Moreover, handles 550 further represent the areas of the treatment light facing the patient.

In the illustrated embodiment of the FIGS. 4a and 4b For example, the handles 550 are arranged in such a way that at the same time they act as fastening means for the cover 570 of the light exit surface. In particular, the handles 550 are also reversibly releasably connected to the housing 500 of the treatment lamp. Preferably, this can be achieved by an externally accessible screw, so that opening the treatment light for removing the handles 550 can be avoided. For example, the handles could be screwed into corresponding support arms 575, so that with the help of the gripping surface sufficient screwing force can be built up, which reliably allows a tool-free connection. This also allows easy cleaning of the handles 550, regardless of the other components of the treatment light, so that in this embodiment, an optimal cleaning of the patient-facing portions of the treatment light is possible. The exemplary embodiment also shows a plurality of attachment points for handles 550, which are arranged on support arms 575, which are preferably formed on the left or right side of the housing 500. With this variety of attachment points, it is also possible to find an arrangement of the handles, which is optimally adapted to the treatment situation. At the same time is in the in FIG. 4a or 4b illustrated embodiment, the cover 570 fixed by means of the connection of the handles 550 to the housing 500 at this.

FIG. 5 further shows a removable mirror 560 which is also connected to the housing 500 or is disposed on a common support arm, wherein the support arm preferably has a gimbal joint for pivoting the treatment light and is connected thereto. Particularly preferably, the mirror 560 is also autoclavable.

In a further development of the invention, the treatment light, for example, in addition to the handles 550 or the mirror 560 further removable control elements 540, which include, for example, a rotary ring preferably for adjusting the dimming or the color location. Particularly preferably, the rotary ring a plurality of locking positions available, so that a reproducibility of the settings is given. Thus, for example, each detent position can be connected to a defined light output of the treatment light, which can select not only a continuous change in the light output but also very different light output properties, for example in the sense of dedicated treatment modes. A further development may relate, for example, in addition to factory presets, the custom storage of light output values in the treatment light. Furthermore, it can be provided that the controls are also designed to be autoclavable.
In addition, a low-cost variant can provide that the lamp has a toggle switch for switching the lamp on and off, which can be integrated, for example, in the axis of rotation of a rotary ring described above.

Treatment modes of the luminaire may include, for example, the intensity increase of the light output in a wavelength range between 400 to 460 nm for the detection of oral cancer. To detect an excited green fluorescence of the oral mucosa, the practitioner must wear dichromatic glasses or the light has, as described below, via appropriate means of detection.

In addition, for example, the intensity increase of the light output could also be provided in a range of 405 nm for the detection of caries in a treatment mode. Metabolic products of the caries bacteria are detected by red fluorescence. The treatment light can also, as described below, be designed to detect these metabolic products.

Furthermore, in a treatment mode, the light output can be predominantly monochrome, for example, to be able to distinguish natural from artificial tooth substance. A recognition could be done by different reflection behavior of artificial or natural tooth substance. For example, the Treatment light designed to detect reflected light at different angles.

In one embodiment, the treatment light comprises operating elements that can be actuated without contact. For example, these may be optical sensors which, for example, are sensitive to movement, preferably in a fixed, predetermined distance range, switch the treatment light on or off or select dimming stages or treatment modes without contact. In addition, the non-contact control elements or corresponding sensor means could be designed to detect possible shadowing in the light path to the object plane and optionally to adjust the number of activated LED light sources 200. For example, it would then be possible to switch off LED light sources 200, which mainly irradiate the area of shadowing, and, if appropriate, to increase the light output of the remaining LED light sources 200 or to switch on previously unused LED light sources 200 of the treatment light. This can ensure that the treatment site is optimally illuminated in each case.

This can be achieved in a particularly efficient manner by, for example, each of the LED light sources 200 being designed to fully illuminate a common, spatially limited light field in an object plane, in particular exclusively this light field.

A development of the invention provides that the operating elements are integrated into the LED light sources 200, so that the treatment light can be supplemented, for example, by the functionality of specific treatment modes by replacement or installation of a corresponding LED light source 200.

A development of the invention provides that the treatment light comprises an image acquisition unit, for example a camera. Preferably, the camera could be arranged on the support 510, for example also in exchange for one of the LED light sources 200, so that the arrangement and exchange possibilities of the LED light sources 200 described above are also conceivable for the image capture unit or camera. The camera can be designed to capture individual images or coherent film sequences.

This is preferably a semiconductor-based image acquisition unit, for example a CCD chip. Particularly preferably, an objective assigned to the image acquisition unit or the camera is embedded in an adjustable calotte which, for example, can pass through the cover 570 of the light exit surface. The adjustment of the dome or the image acquisition unit can then be done manually or remotely, for example, via separate controls.

In particular, for logging the treatment progress, so optimal lighting with optimal orientation of the image capture unit or camera is connected, while avoiding that takes into account shading effects by the introduction of a camera in the light path between the treatment light and object plane and glare effects in the camera alignment by the light Need to become.

In addition to documentation purposes can also be sought, that in "real time" an enlarged view of the treatment site is done, always providing optimal illumination is given. For this purpose, it may be provided to couple the treatment light with an image display device and, for example, to provide corresponding connection means. For example, a monitor could be provided instead of the mirror.

In addition, the camera can also be used, for example, for detection purposes in the treatment modes described above, so that the image acquisition unit is designed, for example, specifically for detecting specific wavelengths or for detecting light at specific angles of incidence.

An embodiment also provides for using the image acquisition unit for controlling the light emission of the treatment light. For example, the image acquisition unit may represent a sensor means described above, which detects the light output of the treatment light and measures the deviation to a desired value. Furthermore, shadowing in the light path could, for example, also be detected with the aid of the image acquisition unit, and particularly preferably, three-dimensional information of the illumination could be detected with the aid of a plurality of image acquisition units.

In a further development, the luminaire may also include an orientation laser. Thus, for example, a central or boundary point of a light field - preferably only briefly - be marked so that an optimal orientation of the treatment light is given. For example, in conjunction with an image acquisition unit, a three-dimensional information of the illumination can also be reconstructed, so that preferably the distance between the treatment light and the object plane can be optimally adjusted with the aid of this information. However, the laser or the treatment light could be associated with other means of detection for distances. Preferably, the laser could be pulsed to operate, so that a temporal evaluation of the reflected signal provides this information.

Finally, a dental treatment light is created by the invention, which is extremely flexible adaptable to the wishes of the user, and at the same time brings excellent hygienic properties.

Finally, it should be particularly pointed out that the combination of features of different embodiments or features disclosed in figures is not excluded according to the invention.

Claims (16)

1. Medical or dental treatment luminaire, comprising

   • a housing (500) and

   • a plurality of LED light sources (200),

   wherein the LED light sources (200) are connected in reversibly detachable fashion to energy supply means (520) for the LED light sources (200), characterized in that the LED light sources (200) are arranged on a common carrier (510), which has fastening areas (515) for the LED light sources (200), is connected to the housing (500) and is designed to dissipate heat from the LED light sources (200).
2. Medical or dental treatment luminaire according to Claim 1, characterized in that the LED light sources (200) are connected in series with one another and/or the energy supply means (520) are arranged within the housing (500).
3. Medical or dental treatment luminaire according to Claim 1 or 2, characterized in that the LED light sources (200) illuminate a common light field in an object plane, preferably exclusively the common light field.
4. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the carrier (510) has fastening means for connecting the LED light sources (200) to the carrier (510).
5. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the fastening areas (515) of the carrier (510) are arranged in such a way that each LED light source (200) is oriented towards a common centre point of a common light field in an object plane.
6. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the thermal conduction between the LED light source (200) and the carrier (510) takes place by virtue of an adhesive film (530).
7. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the carrier (510) has fastening means (525) for the energy supply means (520) of the LED light sources (200).
8. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the LED light sources (200) have a multi-part design, and preferably comprise optical means (220) and/or preferably in each case one printed circuit board (210) which has connection means (215), preferably plug-type connectors.
9. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the LED light sources (200) have a plurality of LED light-emitting means (100) and are preferably in the form of substantially punctiform light sources, wherein the LED light-emitting means (100) preferably have a light emission with different colour loci.
10. Medical or dental treatment luminaire according to Claim 9, characterized in that a plurality of LED light-emitting means (100) of the LED light sources (200) are arranged on a common substrate, which is designed for heat dissipation.
11. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the energy supply means (520) are designed for regulating or controlling the luminous intensity of the LED light-emitting means (100), preferably independently for LED light-emitting means (100) which have a light emission of in each case different colour loci.
12. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the housing (500) is substantially completely closed and in particular has a completely closed cover of a light exit surface of the treatment luminaire, which cover can preferably be autoclaved.
13. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the treatment luminaire has removable control elements (540), which can preferably be autoclaved.
14. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the treatment luminaire comprises control elements (540) which are designed so as to be actuable in contactless fashion.
15. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the treatment luminaire has removable handles (550) or mirrors (560), which can preferably be autoclaved.
16. Medical or dental treatment luminaire according to one of the preceding claims, characterized in that the treatment luminaire comprises a camera and/or an orientation laser.

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