Surgical light with shade sensor

Abstract

The invention relates to a surgical light (10) with at least one light source (1) for illuminating an object, in particular a patient, and a shade sensor (3) for determining the shading of the object to be illuminated by emitting a signal and receiving a reflected signal, wherein a diaphragm (4) arranged in the signal path is provided for separating the emitted and incident signals.

Description

[0001] Operating light with shading sensor

[0002] The invention relates to a surgical light with at least one light source for illuminating an object, in particular a patient, and a shading sensor for determining the shading of the object to be illuminated by emitting a signal and receiving a reflected signal.

[0003] Surgical lights are used to illuminate a surgical field or a patient, at least in sections, for treatment purposes. Especially during medical operations, it is essential that the patient is illuminated as evenly as possible to ensure consistently good visibility for the surgeon. However, especially when several people are performing an operation, shadows can easily occur, for example, if a person places a hand or arm between the surgical light and the patient being illuminated. Such shadows can negatively impact the lighting and thus visibility, and in the worst case, even jeopardize the success of the operation.

[0004] To detect such shadowing, it is known to use shadowing sensors that detect whether there are interfering objects between the light source(s) and the patient to be illuminated. If such interfering objects are detected, the shadowing can be at least partially compensated for by regulating the light sources of the surgical light, thus maintaining the most constant illumination field possible.

[0005] To detect corresponding interfering objects, the shadow sensor emits signals, such as electromagnetic radiation, which are reflected by the patient if there is no shadow, or by the interfering object shading the patient if there is shadow. The reflected signal is then received by the shadow sensor, and an evaluation can determine whether shadowing is present and, if necessary, whether or not adjustment of the light sources is necessary to ensure uniform illumination.

[0006] While shadow detection using such shadow sensors has proven effective in practice, the precision of the shadow sensors is sometimes insufficient, meaning that interfering objects cannot always be reliably detected. This is due to the fact that the transmitter section, which transmits the signals, and the detector section, which receives and detects the reflected signals, are often located very close to each other, which can lead to mutual interference and inaccuracies in detection.

[0007] Based on this, the invention sets itself the task of specifying an operating room with a shading sensor, which is characterized by more reliable shading detection.

[0008] The task is solved in an operating lamp of the type mentioned above by providing a screen arranged in the signal path to separate the emitted and incoming signals.

[0009] By separating the emitted and incoming signals, mutual influence between the transmitter section and the detector section can be reduced, thus improving the precision of interfering object detection. The risk of the incoming and emitted signals mixing with each other is thus reduced. The aperture can advantageously limit the signal cone of the emitted signals and / or the signal cone of the incoming or radiating signals.

[0010] In this context, it is advantageous to have only a single aperture in the beam path, which limits the signal cone of the emitted signals (hereinafter also referred to as the emission cone) and / or the signal cone of the incoming signals (hereinafter also referred to as the incident beam cone). The aperture can thus perform a dual function and, as a single component, achieve a structurally simple limitation of the signal cones.

[0011] According to an advantageous development of the invention, the aperture can be used to increase signal sharpness. In particular, the aperture can limit, absorb, and cut off the outer region of the signal cone of the emitted and / or incoming signals, thereby increasing overall signal sharpness. This can improve the level of detail, which in turn contributes to precise detection of interfering objects.

[0012] With regard to the installation of the cover, it has proven advantageous if it can be detachably mounted on the shading sensor. The cover and the shading sensor can be designed as two separate components, so that the shading sensor can also be used without the cover or the cover can also be used as a retrofit solution for shading sensors. Furthermore, a detachable installation of the cover also simplifies accessibility and thus also maintainability of the shading sensor. This is because the cover can be easily removed for maintenance purposes. Furthermore, it is not absolutely necessary for the cover to be directly connected to the shading sensor. It is possible for both the cover and the shading sensor to be mounted on a common base plate and for the cover to sit on the shading sensor, but for there to be no permanent connection between the shading sensor and the cover.

[0013] It has proven advantageous if the aperture is designed without a lens. Although a limitation of the emitted or incoming signals or the corresponding signal cones and a concomitant increase in signal sharpness could also be achieved using one or more lenses, such a design has proven to be disadvantageous from an economic point of view. This is because corresponding lenses or optics that have lenses are significantly more expensive than a corresponding aperture. The aperture can therefore provide a cost-effective alternative to a lens or optics with a lens. From a design point of view, it has proven advantageous if the aperture has a base plate via which it can be mounted on the shading sensor or on a base plate. The base plate can be essentially parallel to the shading sensor orto the base plate, so that the aperture can be arranged as flat as possible on the shading sensor. In this respect, the forces exerted by the aperture on the shading sensor are kept low or are distributed as evenly as possible over a large area. Advantageously, the base plate is larger than the shading sensor so that the aperture completely covers the shading sensor. In this respect, the aperture can also be used to mount the shading sensor itself and fix it, for example, on a common base plate. For this purpose, the aperture can be connected to the base plate and the shading sensor can be located between the aperture and the base plate and pressed onto the base plate by the aperture with a certain mounting force.

[0014] According to an advantageous development of the invention, it is proposed that the base plate has at least one, in particular two, fastening holes, via which the cover can be detachably mounted on the shading sensor or on the base plate. The fastening holes enable detachable fastening by means of a screw connection, which is characterized by very simple assembly and disassembly. The two fastening holes are advantageously arranged on opposite sides of the base plate, so that two screw connections can be provided, which realize a uniform force distribution or a uniform pressure of the cover on the shading sensor or on the base plate. Furthermore, more than two fastening holes can also be provided to fix the cover.According to an advantageous development, it is proposed that the base plate has a recess, in particular a single recess, through which signals emitted by the shading sensor or incident on the shading sensor can pass through the aperture. From a manufacturing point of view, it is advantageous if, instead of a recess for the emitted signals and a recess for the incident rays, only a single recess is provided for both the emitted and the incident signals. This is because the recess can then be introduced into the aperture in a single work step. The aperture can be arranged on the shading sensor, and the recess can be positioned such that it is located above the shading sensor, so that received signals pass through the recess onto the shading sensor, and emitted signals from the shading sensor can pass through the aperture.The recess can be arranged in the signal path between the shadow sensor and the patient or the interfering object to be detected. The recess can be geometrically adapted to the shape of the shadow sensor; in particular, the shadow sensor can have a rectangular shape and, accordingly, the recess can also have a rectangular shape, in particular of the same size.

[0015] According to a design development of the aperture, it is proposed that the recess be divided into two parts by a partition extending parallel to the radiation direction of the emitted and / or the radiation direction of the incident signals. The partition can thus divide the space above the recess or the shadow sensor into two parts, namely a part for the emitted signals and a separate part for the incident or reflected signals. The partition can also lead to a separation of the transmitter section and the detector section of the shadow sensor, so that crosstalk between the transmitter and detector sections is reliably prevented by the partition. The partition can extend perpendicular to the recess and parallel to the main radiation direction and the main radiation direction.The main radiation direction can be perpendicular to the transmitter section, and the main radiation direction can be perpendicular to the detector section. The main radiation direction can be the longitudinal axis of the radiation cone, and the main radiation direction can be the longitudinal axis of the radiation cone. Furthermore, the main radiation direction and the main radiation direction can be oriented opposite each other.

[0016] It is advantageous if the position of the partition is adapted to the design of the shadowing sensor and is therefore arranged as precisely as possible in the area between the transmitter section and the detector section. In this regard, it has proven advantageous if the partition divides the recess into two differently sized parts, whereby the differently sized parts can be adapted to the size of the transmitter and detector sections. Accordingly, the size of one recess can correspond to the size of the transmitter section and the size of the other recess to the size of the detector section. It is possible for the transmitter section and the detector section to have different sizes or different surface areas. It is possible for the transmitter section to be larger than the detector section.In this respect, the partition wall can also be shifted in the direction of the detector section, so that two recess sections of different sizes are created, which are adapted to the size of the transmitter section and the detector section, respectively.

[0017] Furthermore, it is advantageous if the partition is arranged and designed in such a way that crosstalk of the signals is prevented or at least reduced. Crosstalk refers to an unwanted short circuit between the transmitter and detector sections, in which signals jump from the transmitter section to the detector section without having been previously reflected, for example, by the patient, the operating table, or an interfering object. Such crosstalk can significantly reduce the precision of interfering object detection, which can be prevented by the partition.

[0018] With regard to the partition, it has further proven advantageous if it has a height that is at least twice, preferably at least three times, and particularly preferably at least four times the width of the recess. The partition can therefore have a comparatively large height, which leads to a reliable separation of the areas above the transmitter section and the detector section. In this respect, the partition can also ensure that only signals incident in the direction of the main radiation direction impinge on the detector section, and the incidence of transverse or stray signals can be reduced. The width of the recess can correspond to the geometric extent in the direction perpendicular to the side surfaces of the partition.

[0019] With regard to the aperture, it has also proven advantageous if it has a shading element arranged around the recess to prevent stray signals. This shading element can prevent the incidence of stray signals and simultaneously reduce the radiation cone of the emitted signals. The shading element can protrude perpendicularly from the base plate and thus be arranged essentially parallel to the main radiation direction.

[0020] According to a structural development of the invention, it is proposed that the shading device be designed in the manner of a wall arranged around the recess. This design allows for reliable shading of the recess and thus also of the transmitter and detection sections of the shading sensor arranged beneath the recess. The shading device can be designed in the shape of a pedestal or protrude in the shape of a pedestal relative to the base plate. To simplify the handling of the aperture, the corners and edges of the shading device can be rounded. The dividing wall can extend from one end of the shading device to the opposite end, so that no signals can pass past the dividing wall from the transmitter section to the detector section.

[0021] With regard to the geometry of the shadowing, it has proven advantageous if the height of the shadowing corresponds at least to the width of the recess, preferably at least twice the width of the recess. The height of the shadowing can be less than the height of the partition wall, so that the partition wall protrudes from the shadowing. The height of the shadowing can influence the influence of the transmitted and incoming signals. The greater the shadowing, the smaller the radiation angle or cone of the transmitted signals and the angle or cone of incidence of the incoming signals.

[0022] From a design perspective, it has also proven advantageous if the inner wall of the shading device has a circular cross-section. The inner wall refers to the area of ​​the shading that faces the recess and thus also the partition wall. The inner surface can be the outer surface of a cylinder, so that the shading device can provide a uniform angular limitation in every spatial direction. To form the inner wall, the shading device can therefore have a bore that extends as far as the recess and through which the signals can pass essentially either in the direction of the main radiation direction or in the direction of the main radiation direction. With regard to the inner wall, it has also proven advantageous if it tapers conically towards the recess. The free cross-section of the diaphragm can therefore decrease in the direction of the recess.The inner wall can run through the corners of the recess at the lower end so that the panel as a whole can be designed as compactly as possible.

[0023] With regard to the design of the aperture, it has also proven advantageous if the shading has a stray signal shield on one side extending parallel to the radiation and / or incident radiation direction. The stray signal shield can protrude from the rest of the shading and thus offer greater protection on one side. The aperture can be designed such that the stray signal shield points in the direction from which the greatest proportion of stray signals is expected.

[0024] With regard to the orientation of the stray signal protection, it has proven advantageous if it is positioned perpendicular to the partition wall. The stray signal protection and the partition wall can thus be adjacent to each other in a T-shape. The stray signal protection and the partition wall can be the same height.

[0025] In a further design, it is proposed that the stray signal protection be wedge-shaped. The stray signal protection can thus taper upwards toward its distal end. At the lower end, the stray signal protection can be adapted to the size of the shadowing and extend across the entire width of the shadowing.

[0026] With regard to the aperture, it has also proven advantageous if it is designed as an injection-molded part. This design as an injection-molded part enables cost-effective mass production of the aperture. ABS, for example, can be used as a material. The aperture can be designed as a single, coherent component, which can be manufactured in a single process step. This simplifies handling and assembly. The material used for the aperture is advantageously impermeable to the signal.

[0027] According to an advantageous development of the invention, the shadow sensor comprises a transmitter section for transmitting signals and a detector section for detecting reflected signals. Based on the difference in propagation time between the transmitted and detected reflected signals, it can be determined whether or not there is an interfering object between the operating light and the operating table or the patient to be illuminated.

[0028] With regard to the shadow sensor, it has proven advantageous if it is designed as an optical sensor, particularly an IR sensor. The IR sensor design offers the particular advantage that the emitted signals are invisible to the human eye and therefore do not visually influence the patient or the illuminated operating table. If the sensor is designed as an optical sensor, the emitted and received signals can be electromagnetic radiation. The wavelength of the electromagnetic radiation can be different.

[0029] Alternatively, the shading sensor can also be designed as an ultrasonic sensor. The signals can therefore be pressure or vibration signals.

[0030] sound waves.

[0031] Furthermore, it is advantageous if the transmitter section and the detector section are arranged on a common circuit board. The transmitter section and the detector section are advantageously arranged directly adjacent to one another, so that the shading sensor requires very little installation space. The disadvantages associated with such a tightly spaced arrangement can be prevented or mitigated by a diaphragm, as explained above.

[0032] With regard to the design of the shadow sensor, it has proven advantageous if it is configured as a time-of-flight sensor. Using a corresponding time-of-flight sensor, the time required for the emitted signals to be reflected back to the detector section can be determined. From the corresponding time difference, it can be determined whether an interfering object is located between the operating light or the shadow sensor and the patient.

[0033] According to an alternative, however, the shadow sensor can also be designed as a brightness sensor that detects the brightness of the operating table or the patient. As soon as an interfering object is located between the operating lamp and the operating table, the brightness of the operating table or the patient can change or decrease, at least to a certain extent. By regulating the light sources, countermeasures can be taken after such shadowing is detected.

[0034] With regard to the operating room light, it has also proven advantageous if the screen is aligned so that the stray signal shield faces outwards. This arrangement ensures that stray signals, such as scattered light, cannot reach the shadow sensor, or only to a limited extent. The stray signal shield can thus be positioned toward the nearest edge of the operating room light, so that stray signals entering from the outside do not reach the shadow sensor, but are blocked by the stray signal shield. Since the partition can be arranged perpendicular to the stray signal shield, an extension of the partition can run through the center of the operating room light.

[0035] According to a particularly advantageous development, it is proposed that several shading sensors be provided, whereby each shading sensor can be assigned an aperture. Although the aperture reduces the area detectable by a shading sensor, the detection precision can nevertheless be increased. The reduced detection area can be compensated for by using several shading sensors and, accordingly, several apertures. This allows the spatial resolution of interfering object detection to be increased.

[0036] It has also proven advantageous if the operating room light has at least one control unit coupled to the shading sensors. The control unit can individually adjust the brightness of the light sources depending on the detected shading to at least partially compensate for the shading. If one of the shading sensors detects shading, this shading and the associated influence on the light field can be compensated for by the remaining light sources. For example, it can be provided that the luminosity of some unshaded light sources is increased to compensate for the shading and ensure the most constant light field possible.

[0037] In this regard, it has proven advantageous if the shading sensors are distributed, in particular evenly, across the base plate. The base plate can be a base plate on which both the light sources and the shading sensors, as well as the apertures assigned to the shading sensors, can be arranged. The base plate can have a substantially round shape. The shading sensors can be arranged between several light sources, so that each shading sensor is assigned to several light sources. If the operating light or the base plate has a ring-shaped or circular geometry, the shading sensors can also be arranged in a ring-shaped or circular manner. The shading sensors or the apertures can be designed such that their respective stray signal protection faces outwards.

[0038] Further details and advantages of the invention will be explained in more detail below with reference to the accompanying drawings of an exemplary embodiment of the invention. In these drawings:

[0039] Fig. 1 is a sectional view through a diaphragm arranged on a shading sensor;

[0040] Fig. 2 is a side view of a diaphragm arranged on a shading sensor;

[0041] Fig. 3 is a plan view of the aperture according to Fig. 1 and Fig. 2;

[0042] Fig. 4 is a view of the underside of the panel according to Fig. 3;

[0043] Fig. 5 a perspective 3D view of a diaphragm;

[0044] Fig. 6 an operating light with a base plate and several shading sensors and apertures arranged on the base plate.

[0045] The illustration in Fig. 6 initially shows a plan view of a surgical light 10, which can be used to illuminate an operating table or a person lying on it. The surgical light 10 has a base plate 9 on which a plurality of light sources 1 configured as light pods are arranged, which together illuminate the surgical field as homogeneously as possible.

[0046] Between the light sources 1, shading sensors 3 are provided in some cases, which can detect interfering objects located between the light sources 1 and the patient to be treated, thus resulting in at least partial shading of the patient. The light sources 1 can be controlled via the control unit 2 arranged in the center of the base plate 9, depending on the interfering objects detected by the shading sensors 3, in order to compensate for shading resulting from an interfering object. If, for example, light sources 1 arranged in one area of ​​the operating light 10 are shaded by the arm of a person treating the patient, light sources 1 arranged in another, unshaded area of ​​the operating light 10 can at least partially compensate for this shading, so that the most consistent light intensity possible can be ensured.The shading sensors 3 are arranged as evenly as possible distributed over the base plate 9 or over the operating light 10, so that reliable detection of interfering objects can be ensured.

[0047] The shadowing sensors 3 are flat, circuit board-like components that essentially consist of two elements, namely a transmitter section 3.1 and a detector section 3.2 arranged next to it. The shadowing sensors 3 shown in the exemplary embodiment use a method based on detecting a propagation time difference to detect potential interfering objects. For this purpose, the shadowing sensor 3 has a transmitter section 3.1 that emits signals in the form of electromagnetic radiation in a main radiation direction A. These signals are then reflected, if there is no interference, either by the operating table or by a patient, or, in the event of interference, by an interfering object. To detect the reflected radiation, the shadowing sensor 3 has a detector section 3.1.2 onto which the reflected radiation strikes and from the time-of-flight analysis it can then be determined whether the rays were reflected from the operating table, the patient or from an interfering object in front of the patient.

[0048] The design of the shadow sensor 3 can also be seen in the sectional view shown in Fig. 1. The transmitter section 3.1 is located directly next to the detector section 3.2, and the emitted rays are emitted in the main radiation direction A and received in the main radiation direction E. The main radiation directions A and E shown are simplifications. In reality, the rays A are emitted in a certain radiation cone and are also received or detected again in a certain radiation cone.

[0049] As can also be seen in Fig. 1, a diaphragm 4 is arranged in front of the shadow sensor 3, the design of which will be explained in more detail below. The diaphragm 4 ensures that the emitted and incident electromagnetic radiation is limited in terms of its radiation and incidence cones, which has a positive effect on the precision of detecting an interfering object. However, limiting the radiation and incidence angles also results in the provision of multiple shadow sensors 3, thus ensuring good spatial resolution.

[0050] The structural design of the cover 4 can best be seen from the three-dimensional view in Fig. 5. The cover 4 comprises a base plate 4.1 which has two fastening holes 4.11. The cover 4 can be mounted on the shading sensor 3 and screwed to the base plate 9 using these two fastening holes 4.11. The cover 4 then lies as flat as possible on the shading sensor 3 and is detachably connected to the base plate 9. The position of the fastening holes 4.11 can also be seen in Fig. 3 and Fig. 4, which show the cover 4 and the base plate 4.1 respectively in a top view and a view from below, i.e. from the perspective of the shading sensor 3.

[0051] The aperture 4 or the base plate 4.1 has a recess 4.2 in the central area, which is clearly visible in Fig. 1. This recess 4.2 is located above the shading sensor 3, so that both the emitted radiation and the incident radiation can pass through the recess 4.2 of the aperture 4.

[0052] A shading device 4.3 is provided around the recess 4.2, which, as shown in Fig. 1, has a pedestal-shaped geometry and is intended to prevent laterally incident transverse radiation from falling on the detector section 3.2 of the shading sensor 3. The shading device 4.2 protrudes from the base plate 4.1 in the direction of the main radiation direction A and surrounds the recess 4.2 and thus also the shading sensor 3. The shading device 4.3 thus limits the radiation angle or the radiation cone of the emitted radiation, as can be clearly seen from Fig. 1. The inner wall 4.51 of the shading device 4.3 facing the recess 4.2 is conically designed and tapers downwards in the direction of the recess 4.3, as can be seen in the illustration in Fig. 1. The shading 4.3 closes on one side with the base plate 4.1 and extends on the opposite side not quite to the end of the base plate 4.1. On the side opposite the side flush with the base plate 4.1, the outer side 4.52 of the shade 4.3 is rounded, which improves handling and makes the shade 4 more manageable overall.

[0053] Furthermore, the aperture 4 has a partition 4.4 that protrudes upwards relative to the shading element 4.3. This partition 4.4 divides the recess 4.2 into two sections, namely a first recess section 4.21 and a second recess section 4.22. The first recess section 4.21 is arranged above the transmitter section 3.1, and the second recess section 4.22 is arranged above the detector section 3.2. The radiation emitted by the transmitter section 3.1 thus passes through the first recess section 4.21, and the reflected radiation passes through the second recess section 4.22 before striking the detector section 3.2.

[0054] The partition wall 4.4 thus separates both the transmitter section 3.1 from the detector section 3.2, as well as the areas above the transmitter section 3.1 and the detector section 3.2. As can be clearly seen in Fig. 1, it is therefore not possible for the radiation to pass directly from the transmitter section 3.1 to the detector section 3.2 as a result of crosstalk. Rather, the partition wall 4.4 also ensures that the emitted and incident beams are quite strictly separated from one another, which is also evident from the main radiation direction A and the main radiation direction E. The partition wall 4.4 can thus prevent crosstalk between the transmitter section 3.1 and the detector section 3.2. The height H of the partition wall 4.4 corresponds approximately to three to four times the width B of the recess 4.2, which results in reliable separation. Furthermore, the partition wall 4.4 extends along the entire recess 4.2, thus preventing rays from passing laterally past the partition 4.4. Looking at Fig. 3, it is also clear that the partition 4.4 is not positioned directly in the center of the recess 4.2, but rather is offset laterally, so that the two recess sections 4.21, 4.22 are not exactly the same size. Rather, the partition 4.4 is offset toward the detector section 3.2, which limits the incident radiation somewhat more than the emitted radiation.

[0055] Furthermore, the aperture 4 has a stray signal protector 4.6 or, in the case of an optical shadowing sensor 3, a stray light protector, which can be seen in the illustration in Fig. 2 and Fig. 5. The stray signal protector 4.6 ensures that as few stray signals as possible from outside can fall onto the detector section 3.2, which improves the reliability of the interfering object detection. In terms of construction, the shadow 4.3 is extended upwards in a wedge shape in the direction of the main radiation direction A on one side that is arranged perpendicular to the partition 4.4, so that stray signals from one direction can be blocked particularly reliably by the stray signal protector 4.6. The height of the stray signal protector 4.6 corresponds to the height of the partition 4.4 and, due to their right-angled arrangement, the two elements have a T-shaped cross-section.

[0056] The orientation of the shadowing sensors 3 and the apertures 4 is such that the scattered signal protection 4.6 points outwards, i.e., in the direction of the nearest edge of the base plate 9, as can also be seen in Fig. 6. The respective scattered signal protection 4.6 thus reliably ensure that light or signals incident from the outside, i.e., from the radial direction, are reliably blocked and cannot penetrate to the detector section 3.2.

[0057] By means of the aperture 4 shown, interference during the detection of interfering objects can be reduced and the interfering object detection and thus also the control of the light sources 1 of the operating light 10 can be significantly improved to compensate for any shadowing.

[0058] Reference symbol:

[0059] 1 light source

[0060] 2 control unit

[0061] 3 Shading sensor

[0062] 3.1 Transmitter section

[0063] 3.2 Detector section

[0064] 4 aperture

[0065] 4.1 Base plate

[0066] 4.11 Mounting hole

[0067] 4.2 Recess

[0068] 4.21 first recess section

[0069] 4.22 second recess section

[0070] 4.3 Shading

[0071] 4.4 Partition wall

[0072] 4.51 Interior wall

[0073] 4.52 Exterior wall

[0074] 4.6 Stray signal protection

[0075] 9 Base plate

[0076] 10 Operating light

[0077] A Beam direction

[0078] E Beam direction

[0079] B Width

[0080] H Height

Claims

Patent claims: 1 . Operating light with at least one light source (1) for illuminating an object, in particular a patient, and a shading sensor (3) for determining the shading of the object to be illuminated by emitting a signal and receiving a reflected signal, characterized by a diaphragm (4) arranged in the signal path for separating the emitted and incoming signals.

2. Operating light according to claim 1, characterized in that the cover (4) can be detachably mounted on the shading sensor (3).

3. Operating light according to one of claims 1 or 2, characterized in that the aperture (4) is designed without a lens.

4. Operating light according to one of the preceding claims, characterized in that the cover (4) has a base plate (4.1) with one, in particular with a single, recess (4.2) through which signals emitted by the shading sensor (3) or incident on the shading sensor (3) can pass through the cover (4).

5. Operating light according to claim 4, characterized in that the recess (4.2) is divided into two parts by a partition wall (4.4) extending parallel to the radiation direction (A) of the emitted and / or the radiation direction (E) of the incident signals.

6. Operating light according to claim 5, characterized in that the partition wall (4.4) divides the recess (4.2) into two parts of different sizes.

7. Operating light according to one of claims 5 or 6, characterized in that the partition wall (4.4) has a height (H) which corresponds to at least twice, preferably at least three times, particularly preferably at least four times, the width (B) of the recess (4.2).

8. Operating light according to one of the preceding claims, characterized in that the diaphragm (4) has a shading (4.3) arranged around the recess (4.2) to reduce stray signals, wherein the height of the shading (4.3) corresponds at least to the width (B) of the recess (4.2), preferably at least twice the width (B) of the recess (4.2).

9. Operating light according to claim 8, characterized in that the inner wall (4.51) of the shading (4.3) has a circular cross-section and tapers conically in the direction of the recess (4.2).

10. Operating light according to one of claims 8 or 9, characterized in that the shading (4.3) has on one side a scattered signal protection (4.6) extending in a direction parallel to the radiation direction (A) and / or radiation direction (E).

11. Operating light according to claim 10, characterized in that the scattered signal protection (4.6) is arranged perpendicular to the partition wall (4.4).

12. Operating light according to one of the preceding claims, characterized in that the shading sensor (3) is designed as an optical sensor, in particular as an IR sensor.

13. Operating light according to one of the preceding claims, characterized in that the shading sensor (3) is designed as a time-of-flight sensor.

14. Operating light according to one of the preceding claims, characterized by several shading sensors (3), each A diaphragm (4) is assigned to the shading sensor.

15. Operating light according to claim 14, characterized by at least one control unit (2) coupled to the shading sensors (3), wherein the brightness of the light sources (1) can be individually controlled via the control unit (2) as a function of the determined shading in order to at least partially compensate for the shading.

Images