Targeted decontamination system using far UV-C radiation

Abstract

A new generation device using far UV for targeted decontamination, comprising: - a projection module (1) of a visual pattern onto a localized site (5) identifying a target area (50) to be irradiated; - a UVC beam generation device (2) in the form of a housing (20) comprising a front face (200) defining an opening (201) from which the UVC beam escapes, and integrating a UVC light source (21), a reflector module (22), a UVC beam intensity adjustment module (23), a grid (25) generating a substantially collimated UVC beam; - a telemetry module (3) measuring the distance between the opening (201) of the housing and the target area (50); - a control module (4) determining the intensity of a UVC beam to be generated at the output of the housing as a function of a predefined irradiation dose, and controlling the adjustment module according to said power. Figure for the summary: Fig 2

Description

Title of the invention: Targeted decontamination system using far UV-C radiation Technical field

[0001] The invention relates to a system for targeted decontamination by UV-C type radiation of a localized site, such as an operating or medical intervention site or a surface of medical equipment, and a surgical light incorporating such a system. Prior art

[0002] Surgical Site Infections (SSI) affect approximately 1.7% of patients operated on each year in France. The risk of an SSI occurring depends on multiple factors linked in particular to the surgical procedure itself (skin preparation of the patient, type and class of surgery, duration of the procedure, etc.), the characteristics of the patient operated on (age, risk factors, underlying diseases, etc.) and the general environment in which the procedure is performed (organization of the operating room, air quality and maintenance of the premises, etc.).

[0003] Current solutions to reduce the risks of ISO are essentially based on decontamination of the skin pre- and post-operatively, on sterilization of instruments, on hygiene in the operating room and on the use of laminar flow during operations. However, these precautions do not prevent all contaminations that may occur during surgery, such as the migration of pathogens from the skin to the operating site or the fall of bacteria carried by the air flow.

[0004] Thus, to further reduce the risks of ISO, one solution may be to minimize the germs present at the operating site during surgery.

[0005] Document US5871522 proposes, for example, a system for projecting UV-C radiation towards an operating site. The system generates, in particular, radiation with a wavelength of 254nm. However, the use of UV-C at 254nm is problematic because of the sensitivity of the skin and the cornea to this wavelength. The positioning and orientation of the UV-C beam must therefore be perfectly precise to avoid any irradiation outside the operating site. Thus, in practice, the use of such a system requires heavy and restrictive means of protection, not only for the non-operated parts of the patient but also for the surgeons having to intervene on the operating site, so as to limit the risks of exposure of personnel to UVC radiation. This system is therefore impractical to use.

[0006] Document US2022184414A1 proposes a surgical lighting device of the scialytic lamp type, the lighting head of which integrates three separate optical sources, namely a source providing general lighting of the operating table and two sources generating radiation with germicidal properties, of the UVA and UVC type. This decontamination solution integrated directly into the scialytic lighting nevertheless remains relatively flexible in terms of positioning relative to the operating site. In addition, there is a risk of exposure to UVC radiation for surgeons working on the operating site.

[0007] There is therefore a need for an alternative solution for decontamination by UVC radiation making it possible to prevent infections of the operating site, while limiting the risks of irradiation of personnel working on the operating site by UVC radiation. Presentation of the invention

[0008] In this context, the present invention therefore aims to propose an alternative solution for decontamination by far UVC radiation of a localized site which requires decontamination, such as an operating site for example. The invention aims in particular to propose a decontamination solution which can be implemented during the operation of a patient, while preventing the risks of exposure of the personnel working on the operating site to these UVC radiations.

[0009] Thus, the subject of the invention is a system for targeted decontamination by UVC radiation of a localized site, comprising at least: - a module for projecting a visual pattern onto the site, the visual pattern identifying a target area to be irradiated; - a device for generating a UVC beam in the form of a housing comprising a front face defining an opening from which the UVC beam escapes, the housing incorporating at least: . a first light source configured to emit radiation of wavelength included in the UVC spectrum; . an integrator module coupled to the first light source and configured to return or send all or part of the UVC radiation, advantageously at least 98% of the emitted radiation, towards the front face of the housing; . a module for adjusting the intensity and / or diameter of the UVC beam, the adjustment module being configured to modulate the UVC radiation returned by the integrator module so as to generate an intermediate beam of predefined intensity and / or predefined diameter; and . a grid configured to receive the intermediate beam and generate a UVC beam substantially parallel to a reference optical axis, this optical axis being sen possibly perpendicular to the front face and passing through a focal point located in the target area, the surfaces of this grid being covered by a coating absorbing incident UV rays; - a telemetry module configured to measure the distance between the opening of the housing and the target area, and to determine the size of the target area; - a control module coupled at least to the telemetry module and to the adjustment module, and configured to determine the power or intensity of a UVC beam to be generated at the output of the housing as a function of a predefined irradiation dose, and to control the adjustment module as a function of said power.

[0010] A localized site is understood to mean a delimited or predefined area or surface, for example an operating site, a medical intervention site, an area of ​​skin, or all or part of medical equipment.

[0011] Far UVC means UV radiation in wavelengths below 250nm, for example those between 180nm and 230nm.

[0012] The invention thus proposes a decontamination system combining both: - means of projecting a visual pattern onto a localized site such as an operating site, enabling operating room personnel to clearly identify a target area to be irradiated or being irradiated, - means of measuring the distance and size of the target area; and - control means including optical means enabling the generation and projection throughout the target area, and only in this target area, of a collimated or slightly divergent beam formed of UVC germicidal radiation of power corresponding to the irradiation dose adapted for this target area. The target area thus delimits the size of the beam.

[0013] In practice, the appropriate irradiation dose is determined by the device, and in particular by the control module, according to various parameters, such as the planned intervention time, the distance between the device outlet and the target area, the type of target area, etc.

[0014] Advantageously, the control module can be configured to allow adaptation of these different parameters automatically or manually, for example by the intervention personnel. Thus, the control module can integrate a user interface.

[0015] Thus, by way of example, a UVC dose can be defined according to the following parameters: - the intensity or power of the UVC beam to be delivered to the treatment area; - the size or surface area of ​​the target area to be irradiated; and - the duration of irradiation.

[0016] According to one embodiment, the visual pattern projection module is integrated into the housing or remote from the housing. This projection module may for example comprise a second light source configured to emit monochromatic radiation of wavelength included in the visible spectrum, for example green. The visual pattern may be in the form of a circle, a cross, etc. According to a variant, the projection module is preferably positioned upstream of the first source, the optical means of the projection module preferably being collinear with those of the UVC generation device.

[0017] For example, the projection module may be in the form of a laser module projecting a circle of adjustable diameter centered around the reference optical axis, so that the projected circle is collinear with the UVC beam exiting the housing. According to a variant, the integrator module may be a reflector and may comprise surfaces incorporating openings or a dichroic treatment, allowing the transmission of visible radiation towards the front face.

[0018] Advantageously, the adjustment module comprises an adjustable aperture diaphragm. The diaphragm thus acts as a filter and the aperture of the diaphragm defines the size and power of the beam sent to the grid.

[0019] The adjustment module may also be in the form of a blade made of a material having properties of absorbing part of the incident UVC radiation, for example a silica blade, positioned to allow only part of the radiation to pass through. This blade may in particular be controlled by the control module.

[0020] In practice, the grid preferably extends in the reference optical axis between the adjustment module and the opening of the housing. Advantageously, the grid is formed of several hollow cylindrical tubes concentric around the reference optical axis. The internal and external surfaces of each tube are made of a material having absorption capacities of at least 95% of the UVC radiation incident on these internal and external surfaces. This structure thus offers the advantage of blocking, by absorption, the rays that are too divergent with respect to the reference optical axis, so that the beam projected at the output of the housing has a substantially cylindrical overall shape. In other words, the grid is configured to angularly limit the emission cone of the UVC beam, and advantageously to shape the UVC beam at the output of the housing in the form of a cylinder.Since the UVC beam projection area is delimited, the risk of unwanted irradiation of people working around the target area is thus reduced.

[0021] According to one embodiment, the tubes forming the grid are of different lengths. In particular, the length of the central tubes, i.e. those close to the reference optical axis, is different from that of the peripheral tubes, i.e. those far from the optical axis. In practice, the ends of the tubes close to the adjustment module are on the same plane substantially perpendicular to the reference optical axis. In addition, an increasing gradation of the length of the tubes from the center to the periphery of the grid can be envisaged. In practice, the divergence or emission cone of the UVC beam is defined by the spacing between the tubes and their lengths. Advantageously, the rays are collimated.

[0022] According to one embodiment, the housing further integrates a refractive module (8) configured to concentrate the UVC radiation returned by the integrator module, towards the adjustment module. The refractive module can be composed of one or more lenses movable in translation on the reference optical axis. The movement of each lens can be controlled by the control module to allow a variation in the focusing of the beams.

[0023] In other words, the refractive module acts as an optical condenser and may be in the form of a plano-convex lens. The material and thickness of the lenses are preferably adapted for the transmission of UVC radiation.

[0024] According to another embodiment, the opening incorporates a filter configured to allow the passage of radiation included in one or more predefined wavelength ranges. In practice, the filter is chosen such that it blocks the residual visible rays present in the UVC range and only allows the passage of useful UVC rays included in the 180nm-230nm range, or in the 200nm-230nm range, as well as the visible rays for identifying the target area.

[0025] It is also possible to envisage a system in which the first light source as well as the module for adjusting the intensity and / or the diameter of the UVC beam are integrated into a module based on LEDs with variable power supply. In other words, this LED module automatically integrates electronic means for generating and directing UVC radiation and for varying the intensity of this UVC radiation.

[0026] Advantageously, the system may further comprise means for fixing the housing to a support, for example to an arm of an operating lamp such as a surgical light. In practice, these fixing means may comprise means for orienting the housing relative to the target area, or for orienting the reference optical axis relative to the target area, these orientation means being preferentially coupled to the control module.

[0027] The housing can be coupled to the lighting head of the surgical light arm or be integrated into the lighting head of the surgical light arm.

[0028] In practice, the telemetry module can be integrated into the control module or into the housing of the UVC beam generation device or into the projection module. The control module is preferably remote from the housing and communicates with the different modules via a wired and / or radio link.

[0029] The invention also relates to a surgical light comprising at least: - an articulated arm; - a lighting head; - at least one decontamination system as defined above, at least one housing of the decontamination system being positioned on the articulated arm, or on the lighting head or integrated into the head.

[0030] According to a variant, a housing of the decontamination system is positioned on the lighting head in place of the handle of the surgical light.

[0031] According to another variant, two housings of the decontamination system are integrated into the lighting head of the surgical light. Brief description of the figures

[0032] Other characteristics and advantages of the invention will emerge clearly from the description given below, for information purposes only and in no way limiting, with reference to the appended drawings, in which:

[0033] [Fig-1] is a schematic representation of the modules making up a system of de contamination according to one embodiment of the invention.

[0034] [Fig.2] is a schematic representation of the beam generating device UVC according to one embodiment of the invention.

[0035] [Fig.3] is a front view of the grid formed of concentric tubes, according to a embodiment.

[0036] [Fig.4] is a schematic representation illustrating the variation of the intensity germicidal along an axis transverse to the operating axis.

[0037] [Fig.5] is a schematic representation illustrating the attachment of the system to a arm of a surgical light according to one embodiment.

[0038] [Fig.6] is a schematic representation illustrating the fixing of two boxes on two independent arms of the surgical light.

[0039] [Fig.7] is a schematic representation illustrating the fixing of the housing in place and place of the surgical light handle.

[0040] [Fig.8] is a schematic representation illustrating an embodiment in which two boxes are integrated into the lighting head of the surgical light.

[0041] It will be noted that in these figures, the same references designate identical or similar elements and the different structures are not to scale. Furthermore, only the elements essential to the understanding of the invention are represented in these figures for reasons of clarity. Detailed description of the invention

[0042] With reference to [Fig. 1], a UVC radiation decontamination system used in the context of decontaminating an operating site 5 according to a method of rea- lization includes: - a projection module 1 of a visual pattern; - a generation 2 device of a UVC beam; - a telemetry module 3; and - a control module 4 coupled to all of these elements so as to adapt the intensity and size of the UVC beam according to the area to be irradiated and the desired UVC irradiation dose.

[0043] The projection module 1 is configured to project a visual pattern onto the operating site so as to identify a target area 50 to be irradiated or being irradiated on the operating site 5. The visual pattern may be in the form of a circle or a cross, and delimits the size of the UVC beam. This visual pattern thus allows personnel to identify the area actually irradiated. The projection module 1 may be integrated into the generation 2 device or be independent of the projection module.

[0044] The generation device 2 of a UVC beam integrating the projection module 1 is illustrated in [Fig. 2]. The generation device is in the form of a housing 20 made of a light-tight material and comprises a front face 200 defining an opening 201 from which the UVC beam escapes. An optical path is also defined in this housing in the direction of the front face 200 of the housing 20 and substantially parallel to a reference optical axis X. This reference optical axis X extends substantially perpendicular to the front face 200 and may correspond to the central axis of the housing.

[0045] The housing integrates a first light source 21 configured to emit radiation of wavelength included in the UVC spectrum, preferably between 180nm and 230nm. This first light source may be in the form of an LED. This first light source 21 is positioned close to the focus of an integrator module 22. This integrator module 22 is configured to return all of the radiation emitted by the first source 21 towards the front face 200. For example, as illustrated in [Fig.l], the integrator module may be in the form of a reflector such as a mirror whose shape is configured to return the radiation towards the front face with a small divergence relative to the reference optical axis.

[0046] The projection module 1 may be in the form of a circular radiation laser module positioned upstream of the integrator module 22 and the first source 21, in the direction of the optical path, and the integrator module 22 may comprise one or more openings 220 allowing direct transmission of the laser radiation towards the front face. The visible laser beam is preferably collinear with the UVC beam. The transmission of the laser radiation may also be obtained via a dichroic treatment on the surface of the integrator module 22 when this integrator module is in the form of a reflector. In this configuration, the visible laser radiation remains localized at the periphery of the UVC radiation.

[0047] In order to allow the size and intensity of the UVC beam leaving the housing to be adapted to the target zone, an adjustment module 23 is positioned downstream of the first light source 21 and the integrator module 22. This adjustment module is for example in the form of an adjustable aperture diaphragm controlled by the control module 4. The opening of the diaphragm defines the size and power of the UVC beam. The adjustment module 23 may also be in the form of a blade made of material having properties for absorbing part of the incident UVC radiation, for example a silica blade, the position of which is controlled by the control module to transmit only part of the radiation sent by the integrator module 22.

[0048] Optionally, a refractive module 24 can be positioned between the integrator module 22 and the adjustment module 23. This refractive module 24 can be in the form of a lens or a stack of lenses whose movement can be controlled by the control module 4. The movement of one or more lenses allows a variation in the focusing of the beam on the target zone 50. The refractive module 24 behaves like an optical condenser configured to concentrate the radiation returned by the integrator module 22, towards the adjustment module 23. The material and thickness of the lenses are preferably adapted for the transmission of all or at least 95% of the UVC and / or visible radiation of the visual pattern.

[0049] The radiation leaving the adjustment module 23 then passes through a grid 25 configured to produce a collimated UVC beam or at least one substantially parallel to the reference optical axis X. The grid 25 is formed of several hollow cylindrical tubes 250, 251, 252 concentric around the reference optical axis X, as illustrated in [Fig. 3]. The internal and external surfaces of each tube 250, 251, 252 are made of a material having absorption capacities of at least incident UVC radiation, even at grazing incidence, on these internal and external surfaces. In practice, the tubes are composed of materials with low reflection in the 180nm to 230nm band in order to absorb stray rays that are too divergent with respect to the reference optical axis. Thus, the beam produced at the output of the grid 25 has a generally cylindrical shape.

[0050] The tubes forming the grid are of different lengths. For example, the length of the central tube 250, i.e. close to the reference optical axis, may be less than that of the peripheral tube 252, i.e. far from the optical axis. Thus, by adapting the spacing between the tubes and their length, it is possible to play on the divergence or the emission cone of the UVC beam.

[0051] Indeed, the divergence of the beam emitted in the space between two tubes covered by a coating that perfectly absorbs UVC rays is defined by the geometry of the tubes. The divergence angle 0 is equal to: = arctan^^^-)' °where Lmin is the length of the shorter of the two tubes, and e is the spacing between the two tubes.

[0052] Since absorption by the coating is generally not perfect, there exists after each reflection a parasitic ray of intensity i2: / 2 = ïl*p, where p is the reflectivity of the coating at the chosen wavelength and at the angle of incidence of the ray.

[0053] To avoid divergent and parasitic rays, these must be strongly absorbed. Since the reflectivity cannot be arbitrarily low, it is desirable to have more than one reflection, in order to attenuate the intensity of the divergent ray by successive reflections.

[0054] The minimum length L2min of the tubes to achieve an attenuation “a” can be written in the form: L2min = —r— *ln( ) This length is greater than Lmin tan( 0) ''' , and the angles of the rays will therefore be more restricted than for the minimum length.

[0055] Generally speaking, UVC sources are extended sources, the radiation of which cannot be considered as coming from a single point. Optical control of the emitting zones close to the optical axis (paraxial rays) is easier than for the zones located far from the axis. As a result, a beam of rays close to the axis coming from the reflector / collimator / diaphragm system is significantly less divergent than a ray coming from the source far from the axis, and the grid can be satisfied with a reduced number of reflections to limit the intensity outside the zone to be irradiated. The rays coming from the peripheral zones of the source are more dispersed, with stronger intensities in high divergence angles. It is therefore necessary to absorb these parasitic rays more strongly, to increase the number of reflections, and therefore to increase the length of the external tubes.

[0056] This construction is of course linked to this particular optical configuration in which the central tube is shorter than the peripheral tube.

[0057] Other optical systems of different variations, for example with inverse length variation, i.e. longer tubes in the center, can be envisaged.

[0058] The elements of this grid 25 can be mobile, and their movement can be controlled by the control module 4 in order to adapt the beam to the size of the target zone.

[0059] In practice, UVC sources also emit residual radiation in visible wavelengths. To eliminate this residual radiation, it is possible to place a filter 26 at the opening 201. The filter 26 can in particular be chosen so as to only allow the rays included in one or more predefined wavelength ranges to pass through, so as to block the residual radiation. For example, the filter 26 can be configured to transmit useful UVC rays in the range 180nm-230nm, preferably in the range 200nm-230nm, as well as the wavelengths of the visual pattern radiation.

[0060] The housing 2 also integrates a power supply module 27 making it possible to adapt the characteristics of the energy delivered by an electrical network via a cable 28 to the operation of the light source(s).

[0061] [Fig.4] illustrates the variation in the intensity of the germicidal beam along an axis transverse to the operating axis. The intensity I is maximum in the target zone 50 corresponding to the operating zone, and drops abruptly outside of it. This abrupt variation allows the care team to work around the patient in complete safety. A less abrupt drop would imply greater exposure of the peripheral region, the space where the care team circulates.

[0062] Thus, the various parameters (size of the treated area, intensity) can be controlled by the control module 4 via a wired connection 40 and / or a radio connection. A wired connection is preferred to avoid any interference with the various control machines present in the operating room. The control module 4 is also coupled with the telemetry module 3 to measure the distance between the opening of the housing and the target area, and to determine the size of the target area. The telemetry module 3 can be integrated into the housing or remote from the housing.

[0063] These parameters may be a function of the different phases of the operation, such as preoperative decontamination of the skin, treatment during the operation, postoperative decontamination, etc. Therefore, several scenarios may be envisaged and preprogrammed. For example, a decontamination sequence may comprise a phase of decontamination of the skin, with high intensity over a large area for a short time, then a phase with low intensity over a large decontamination area during the operation in order to intercept a maximum of airborne pathogens, this phase being able to be temporarily interrupted at the request of the healthcare personnel to allow an examination of the wound at a short distance, then a short sequence with high intensity over a limited area corresponding to the closed wound.

[0064] The system of the invention can thus be installed in an operating theatre and in particular fixed to a scialytic type device via fixing means 27 of the housing 2. These fixing means 7 can also comprise means for adjusting the orientation of the housing and in particular the optical reference axis relative to the target zone. These orientation adjustment means are preferably coupled to the control module.

[0065] Thus, different modes of implementation of the decontamination system can be envisaged. Non-limiting examples are illustrated in Figures 5 to 8.

[0066] As illustrated in [Fig.5], the housing 3 of the decontamination system can be fixed on an arm 60 of a surgical light 6 so as to be positioned very close to the lighting axis. In practice, if the surgical light is fixed, that is to say non-orientable and non-movable, the decontamination system may comprise focusing and defocusing means, as well as means for offsetting the optical axis of the system relative to the axis of the surgical light, so as to position the target zone exactly in the operating zone and to generate the UVC rays in this target zone.

[0067] As illustrated in [Fig.6], two housings 2a, 2b can also be fixed on two arms 60a, 60b independent of the surgical light 6 so as to be positioned very freely. This configuration can help avoid shadows.

[0068] As illustrated in [Fig.7], the housing 2 can be installed in place of the handle of the surgical light generally attached to the lighting head 61 of the surgical light. This method of attachment makes it possible to obtain adequate positioning of the UVC germicidal beam on the target area.

[0069] As illustrated in [Fig.8], two housings 2a, 2b can be integrated into the head lighting 61 of the scialytic. In this configuration, the power supply of the light sources can be common with that of the lighting head. Similarly, the control part can be common with that of the lighting head.

[0070] Thus, the solution proposed by the invention allows decontamination of an operating field, during the operation, in order to avoid the deposition of viable pathogens on the operating site. The creation of a beam of monochromatic ultraviolet rays with a wavelength between 180 nm and 230 nm, focused on a predefined area located on the operating field, allows the decontamination of this area. The size of the area is adapted so as not to expose areas outside the operating area so as not to unnecessarily expose personnel. In addition, the creation of a visible beam delimiting the area where the germicidal rays are focused allows caregivers to verify that the majority of the flow is directed onto the target area. This beam is also used to indicate to the care teams a potential exposure on a part of the body which would not be protected.

[0071] The solution of the invention is therefore a new generation device using far UV for targeted decontamination. The system of the invention allows control of the intensity of the UVC beam to limit the exposure of personnel and to adapt the power to the phase and duration of the operation, so as to deliver an appropriate irradiation dose. By adapting the intensity of the UVC beam to the duration of the operation, it is ensured that neither the patient nor the caregivers receive a dose higher than an admissible dose, in the absence of additional protective measures. Thus, the system of the invention is not limited to the decontamination of an operating site. The system of the invention can be used for decontamination targeted decontamination of a medical intervention area, for example decontamination of a skin surface before injection, or for the decontamination of medical equipment.

Claims

Claims

1. System for targeted decontamination by UVC radiation of a localized site (5), comprising at least: - a projection module (1) of a visual pattern on the site (5) identifying a target area (50) to be irradiated; - a device (2) for generating a UVC beam in the form of a housing (20) comprising a front face (200) defining an opening (201) from which the UVC beam escapes, the housing (20) integrating at least: . a first light source (21) configured to emit radiation of wavelength included in the UVC spectrum; . an integrator module (22) coupled to the first light source (21) and configured to send the UVC rays towards the front face (200); . a module (23) for adjusting the intensity and / or diameter of the UVC beam, the adjustment module (23) being configured to modulate the UVC radiation returned by the reflector module so as to generate an intermediate beam of predefined intensity and / or predefined diameter; and . a grid (25) configured to receive the intermediate beam and generate a UVC beam substantially parallel to a reference optical axis (X), this optical axis (X) being substantially perpendicular to the front face (200) and passing through a focal point located in the target zone (50), the surfaces of this grid being covered by a coating absorbing the incident UV rays; - a telemetry module (3) configured to measure the distance between the opening (201) of the housing and the target area (50), and to determine the size of the target area; - a control module (4) coupled at least to the telemetry module (3) and to the adjustment module (23), and configured to determine the power or intensity of a UVC beam to be generated at the output of the housing as a function of a predefined irradiation dose, and to control the adjustment module as a function of said power.

2. The system of claim 1, wherein: - the projection module (1) of the visual pattern is integrated in the housing (20), and comprises a second light source configured to emit monochromatic radiation of wavelength included in the visible spectrum; - the integrator module (22) comprises surfaces incorporating openings or a dichroic treatment allowing the transmission of visible radiation towards the front face.

3. System according to claim 2, in which the projection module (1) is in the form of a laser module projecting a circle of adjustable diameter centered around the reference optical axis (X), the projected circle being collinear with the UVC beam exiting the housing.

4. System according to one of claims 1 to 3, in which the adjustment module (23) comprises an adjustable aperture diaphragm.

5. System according to one of claims 1 to 4, in which the grid (25) extends in the reference optical axis (X) between the adjustment module (23) and the opening (200) of the housing (20), the grid (25) being formed of several hollow cylindrical tubes (250, 251, 252) concentric around the reference optical axis (X), the internal and external surfaces of each tube (250, 251, 252) being made of a material having capacities for absorbing UVC radiation incident on these internal and external surfaces.

6. System according to claim 5, in which the tubes (250, 251, 252) forming the grid (25) are of different lengths.

7. System according to one of claims 1 to 6, in which the housing (20) further integrates a refractive module (24) configured to concentrate the UVC radiation returned by the integrator module (22), towards the adjustment module (23).

8. System according to claim 7, in which the refractive module (24) is composed of one or more lenses movable in translation on the reference optical axis.

9. System according to one of claims 1 to 8, in which the opening (200) of the housing (20) is provided with a filter (26) configured to allow the passage of radiation included in one or more predefined wavelength ranges.

10. Scialytic lamp comprising at least: - an articulated arm (60); - a lighting head (61); - at least one decontamination system according to one of claims 1 to 9, at least one housing (20) of the decontamination system being positioned on the articulated arm, or on the lighting head or integrated into the head.

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