Abstract: A portable grilling system comprising a grate formed of a non-flammable material; at least two support members formed of a non-flammable material and pivotally attached to the grate; at least one fuel insert support member formed of a non-flammable material and positioned below the grate; and a fuel insert comprising a base tray formed of a biodegradable material having a bottom surface and one or more sidewalls extending upwards from the bottom surface; a biodegradable and non-flammable liner positionable within the base tray; and a fuel source positionable within the liner.

Abstract: A folding grill stand structure with high storage convenience is revealed. The grill stand includes a first support, a second support, a third support and a plurality of lateral supports. Each first horizontal rod of the first support includes a first side surface and a second side surface. A first end portion and a second end portion of each second horizontal rod of the second support are connected to the first side surface in a foldable manner by a first rotating shaft and a first bolt respectively. A third end portion and a fourth end portion of each third horizontal rod are connected to the second side surface in a foldable manner by a second rotating shaft and a second bolt respectively. The lateral supports are formed on an end portion of the outer side of the first, the second and the third supports respectively.

Abstract: A substantially closed loop filtration and convection system is configured to move fluid/oil volume within a fryer vat. The vat has a flow directed inlet, which directs flow of cooking fluid in a direction across the bottom of the vat directing the flow of oil and crumbs/debris across the vat, up and across a flow separation portion toward and into a cleaning zone portion of the vat. A crumb tray or crumb/debris catch system is disposed in the cleaning zone adjacent to the vat.

Abstract: A portable blender includes a handle having at least one first attachment structure, an activation button, and a power activation member positioned for mechanical engagement with the activation button and a power switch. The blender also includes a container body with at least one second attachment structure. The first attachment structure and second attachment structure are configured to engage each other to attach the handle to the container body and to disengage each other to detach the handle from the container body. The blender further includes a container base configured for detachable engagement with the container body. In one configuration, the blender set includes a motor subunit configured for detachable engagement with the container base, and a power subunit configured for detachable engagement with the motor subunit. In another configuration, the blender includes a motor subunit configured for detachable engagement with the container base, and a power subunit included in the handle.

Abstract: A multipurpose container (1;100;200) for hot or cold ready-to-eat food is described, said container having a containing base (2) and a lid (12) for closing said base (2), both made of a metallic food-grade material, said base (2) and/or said lid (12) having at least one through-hole (16) for allowing vapors to escape, the container being characterized in that said base (2) and said lid (12) are made of a thin sheet of metallic material having a thickness of between 0.1 mm and 0.5 mm, preferably between 0.2 mm and 0.4 mm.

Abstract: A mobile bathroom assembly with a support frame member assembly operably configured to attach to a trailer hitch and support a lower shell and an upper shell. The lower shell includes a bottom wall and a sidewall enclosing a lower shell cavity and having a lower sidewall door. The bottom wall includes a toilet assembly coupled thereto fluidly coupled to a liquid supply tank and a circulation pump operably configured to induce a flow of liquid from the liquid supply tank to the toilet assembly. The upper shell also includes a sidewall surrounding a ceiling wall and defining an upper shell cavity, wherein the upper shell is operably configured with a motor assembly to extend upwards and contract downwards with respect to the lower shell to increase and decrease the internal assembly height and lower and upper shell cavities within the lower and upper shells.

Abstract: A dispenser unit has a bottle suitable for containing a liquid product, a dispenser and a fixing system with a first plate suitable for being fixed to a wall, a second plate suitable for being fixed to the bottle in a recessed seat of the bottle and coupled with the first plate, and a key suitable for uncoupling the first plate from the second plate.

Abstract: A liquid soap dispensing device with a soap dispensing apparatus and a timer, and associated methods, are disclosed herein. The soap dispensing apparatus includes a housing and a soap dispensing element. The timer includes a traveling object (e.g., a ball), a track, and a mover. The track is configured to receive the traveling object at a start position and release the traveling object at an end position. The track is also configured to carry the traveling object from the start position to the end position in a time interval. The mover is configured to displace the traveling object from a first position to a second position. Displacement of the traveling object from the first position to the second position initiates the release of the traveling object onto the track at the start position.

Abstract: Among other things, a dispenser for dispensing material is provided herein. The dispenser includes a cover. The dispenser is configured to receive a container from which material is dispensed. The container is adapted to be supported by the cover. Biasing structure is adapted to apply a force to the container to facilitate dispensing the material from the container.

Abstract: A soap dispenser for use in a shower room in a hotel bathroom, includes bottles for containing shampoo or shower gel, and a placement sheet, one side of the placement sheet is bent downward in an arc shape, placement rings are provided on the placement sheet, and a semicircular ring sheet is provided at each of the placement rings near the side of the placement sheet in the form of an arc-shaped surface; a fixing sheet is hinged to one end of the placement sheet, two snapping grooves are provided on the fixing sheet, an edge of each of the snapping grooves is butt-jointed with an edge of the respective semicircular ring sheet, and an edge of a bottom face of the snapping groove abuts against the placement ring.

Abstract: The present disclosure concerns a web material feed assembly for a web material dispenser comprising a housing, the web material feed assembly comprising first and second rollers rotatable relative to the housing of the dispenser about first and second parallel axes. The first roller is provided with friction rings forming a nip between the first and second rollers for feeding the web material therethrough, at least one of the friction rings comprising a recessed surface forming an anti-wrinkling space between the first and second rollers. The disclosure also concerns a web material dispenser with such a web material feed assembly and a method for preventing wrinkles in a web material dispensed by a web material dispenser with such a web material feed assembly.

Abstract: A sliding partition enclosure system for a modified portable commode cabana with a private urinal cabana, providing simultaneous dual use. A commode cabana's internal compartment includes a commode and waste containment chamber disposed below. An external shell including: a roof, three wall panels, a front panel with latching door and a floor panel with external parallel tracks, a urinal affixed upon the external shell, a drainage system connecting the externally mounted urinal to the enclosed waste containment chamber. A sliding partition unit when extended, provides the private urinal cabana enclosure, including: two horizontally side panels on external parallel tracks of the commode cabana, a front panel with latching door, a roof, and a floor panel hinged to the commode cabana's floor that folds down, stabilizing the sliding partition enclosure when in use. The floor folds up and the partition slides closed when not in use for portability.

Abstract: A splash guard toilet riser apparatus having a wall having a front portion has a concave indentation to reduce splash during toilet use. The splash guard toilet riser has a rear wall with a depressed elevation to allow for access to clean a toilet riser user. The splash guard toilet riser constructed of foam material and adapted to sit atop a toilet during use of a toilet.

Abstract: A surface cleaning apparatus comprises a canister body having a recess with sidewalls that extend upwardly from a platform, the platform having a pre-motor filter housing with a pre-motor filter positioned therein, wherein at least 50% of a perimeter of the pre-motor filter is recessed inwardly from the sidewalls of the recess whereby, when a pre-motor filter is positioned in the pre-motor filter housing, a portion of the platform is visible between the perimeter of the pre-motor filter and the sidewalls of the recess. An air treatment assembly is removably mountable to the canister body and seats on the recess when the air treatment assembly is mounted to the canister body.

Abstract: A handheld vacuum cleaner including a fluid flow path, a main body, a fluid flow motor, a battery, and a cyclone chamber. The fluid flow path extends from a dirty air inlet to a clean air outlet, and the main body includes a handle. The fluid flow motor is positioned in the fluid flow path. The battery is positioned below the fluid flow motor. The cyclone chamber is in the fluid flow path transverse to the dirty air inlet. The cyclone chamber includes a first end wall and a second end wall, a cyclone chamber axis passing through the first end wall and the second end wall, a cyclone dirty fluid inlet, and a cyclone clean fluid outlet. The first end wall and the second end wall of the cyclone chamber both intersect a common horizontal plane when the handheld vacuum cleaner is positioned on a horizontal surface.

Abstract: This document describes a mobile cleaning robot including a chassis having a forward portion and an aft portion; a blower affixed to the chassis; a bin supported by the chassis and configured to receive airflow from the blower, the chassis enabling evacuation of the bin through a bottom of the robot. The bin includes a top, a bottom, a sidewall, and an internal barrier. The bin includes a first volume and a second volume separated by the internal barrier and a filter unit supported by the internal barrier and removably disposed in an airflow path between the first volume that includes an intake port in the bin and the second volume that includes an exhaust port in the bin.

Abstract: A vacuumed material collection station for receiving vacuumed material from a vacuum cleaning apparatus includes a vacuumed material collection container and an interface for connecting the vacuum cleaning apparatus to the vacuumed material collection station. The vacuumed material collection station comprises a receptacle space for receiving a filter chamber of a vacuum cleaning apparatus connected to the vacuumed material collection station and a feed device for feeding the filter chamber into the receptacle space. The receptacle space is designed for completely encompassing the filter chamber and/or at the most not encompassing a chamber side facing the interface with the vacuum cleaning apparatus. The receptacle space forms a partial volume within the housing of the vacuumed material collection station, and the feed device is designed for removing the filter chamber from the vacuum cleaning apparatus and displacing the filter chamber into the receptacle space.

Abstract: A suction material collecting station for regenerating a filter chamber of a suction cleaner has an interface for connecting to the suction cleaner, a suction material collection container, a fan for generating a negative pressure in the suction material collection container, and an electric motor for driving the fan so that suction material contained in the filter chamber may be conveyed into the suction material collection container. The suction material collecting station has a control and evaluation unit that calculates a surroundings disturbance parameter and controls the operation of the electric motor automatically, depending on the surroundings disturbance parameter and a device parameter of the suction cleaner.

Abstract: A cleaning device and a method therefor are provided. The cleaning device includes a vacuum cleaner including a dust collecting container and a docking station to which the dust collecting container is coupled. The docking station includes a suction device configured to move air from the dust collecting container to inside of the docking station, a collector configured to collect a foreign substance that is moved together with the air by driving of the suction device, a suction flow path along which air moves inside the docking station, a flow adjusting device configured to open or close the suction flow path, and at least one processor configured to control the suction device to operate based on the dust collecting container being coupled to the docking station, and control the flow adjusting device to periodically open and close the suction flow path in a state in which the suction device operates.

Abstract: A dust collecting device with an extendible and flexible air tube including a housing, a cover, an air tube, a dust collecting head, a filter material and a gas guiding device. The cover is detachably disposed on the housing and has an accommodating groove. The air tube is positioned in the accommodating groove and extendible and flexible, the air tube is capable of being extended to outside the accommodating groove and retracted to be accommodated in the accommodating groove, and a bending angle and an extension direction of the air tube is changeable by flexibility. The dust collecting head is disposed at the air tube, and is positioned in the accommodating groove when the air tube is shortened to be accommodated in the accommodating groove. The filter material is disposed inside the housing and close to the cover. The gas guiding device is disposed inside the housing.

Abstract: An information processing method in a server device includes obtaining first information obtained by at least one of one or more sensors installed in a space, detecting the breakage of an article present in the space based on the first information, estimating a situation where the breakage of the article occurred based on the first information, and outputting second information for causing a self-propelled device to perform a predetermine operation in the space according to the estimated situation.

Abstract: A cleaning system may include a first mobile robot, a communication unit configured to communicate with a second mobile robot that emits a second signal, and a controller configured to recognize the location of the second mobile robot using the second signal, and control a moving speed of the first mobile robot such that the second mobile robot follows a trajectory corresponding to the movement of the first mobile robot based on the recognized location. The controller may transmit a first signal to the second mobile robot in response to the first mobile robot approaching the second mobile robot to within a distance less than a threshold distance from the second mobile robot, and control avoidance moving of the first mobile robot and the second mobile robot based on the second signal of the second mobile robot responding to the first signal.

Abstract: A floor sweeper includes a housing which has a garbage cavity for containing garbage. The garbage cavity has an inlet allowing the garbage to enter the garbage cavity. A sweeping roller is disposed at the inlet of the garbage cavity, is rotatably connected to the housing and is able to sweep outside garbage into the garbage cavity. A sealing plate for opening/closing the inlet is disposed at the inlet of the garbage cavity. An ejector rod is vertically and movably connected to the housing, has an upper end connected to the sealing plate and is able to move vertically to drive the sealing plate to move. When floor sweeper cleans a floor, the ejector rod abuts against the floor and moves upwards to drive the sealing plate to move to open the inlet of the garbage cavity.

Abstract: A random orbit scrubber comprises a main body having a front end and a rear end, a squeegee assembly coupled to the rear end of the main body, and a cleaning head assembly coupled to the front end of the main body. The cleaning head assembly can include a cleaning element structured for contact with a floor surface. The cleaning head assembly can further include a motor that is operable to impart rotational and orbital movement on the cleaning element. The cleaning head assembly can also include one or more arcuate cleaning fluid manifolds each having a plurality of dispensing points to distribute cleaning fluid in one or more locations on top of and in front of the cleaning element. The arcuate cleaning fluid manifolds can include variable flow nozzles and can be mounted to a carriage that rotates about the cleaning head assembly.

Abstract: A cleaning tool is provided. The cleaning tool includes a first roller, a second roller, a shell and a wiper. The first roller is rotatably connected to the shell. The second roller is rotatably connected to the shell. Two ends of the wiper are wound around the first roller and the second roller, respectively. The cleaning tool further includes an operation part and a link part. The operation part moves in an axial direction of the first roller to control the link part to unlock the second roller and the operation part rotates to drive the first roller to rotate. Unlocking of the second roller and rotation of the first roller and the second roller are controlled by different motions of the operation part.

Abstract: A nozzle for a cleaner includes a nozzle body having a suction passage in which air flows. A water tank is detachably mounted on the nozzle body, and a rotation cleaning part is rotatably supported at a lower side of the nozzle body to receive water from the water tank for cleaning a floor. The water tank includes an outlet through which water is discharged, a valve configured to open and close the outlet, and an air hole configured to introduce outside air into the water tank. An air hole operation part is movably installed on the water tank to open and close the air hole.

Abstract: A bucket includes: at least two chambers which are flow connected to one another by at least one overflow channel. One of the chambers is a combined washing-out/centrifuging chamber for a cleaning device. One of the chambers is a water level-regulating chamber configured to regulate a water level in the washing-out/centrifuging chamber. The water level-regulating chamber contains a displacement body which is movable by a first actuating device.

Abstract: A dishwasher includes a case, injection arms, a sump including an injection flow path coupling portion, a washing pump for supplying washing water stored in the sump to the injection arms, and a switching valve including a flow path distributor for distributing washing water to injection arms. The flow path distributor defines distribution holes. When the flow path distributor is in a reference position, the distribution holes are positioned so that all of the injection arm supply holes are opened, and, when the flow path distributor is rotated by a first angle from a reference position, the distribution holes are positioned so that any one of the injection arm supply holes is opened. The injection flow path coupling portion includes a plurality of support ribs protruded toward the flow path distributor and including a support rib corresponding to at least one of the distribution holes.

Abstract: A method for controlling a dish washer includes: supplying washing water to a water storage unit; delivering washing water from the water storage unit to the washing tank; heating washing water in the sump by a first heat exchanger disposed in the sump; injecting heated washing water through an injection arm; recovering heat from heated washing water by the first heat exchanger and transferring heat to a second heat exchanger disposed in the water storage unit after completion of washing; and discharging washing water cooled by the first heat exchanger from the sump to an outside. The dish washer includes a heat pump system including the first heat exchanger, the second heat exchanger, an expansion apparatus, that expands refrigerant received from the first heat exchanger or the second heat exchanger, a compressor that compresses and circulates refrigerant received from the first heat exchanger or the second heat exchanger.

Abstract: A retrofit auxiliary device for distributing cleaning resources to a household cleaning appliance having a treating chamber is described wherein the device can connect to various household cleaning appliances of different makes and models and can learn the flow of water and detergent during various stages of operation and then perform the dispensing itself.

Abstract: An endoscope having a proximal end and a distal end, a handle at the proximal end and an insertion tube extending from the proximal end towards the distal end. The insertion tube includes an internal working channel extending from the handle to the distal end of the insertion tube. A connector at the handle is adapted for the attachment of a syringe. A recess is adapted to accommodate a cylindrical body of the syringe when said syringe is attached to the connector.

Abstract: Embodiments of the disclosure include an endoscope tip assembly for use on an endoscope, during procedures. The endoscope tip assembly may include a base configured to receive an endoscope tip configured to not disengage from the endoscope tip during a procedure. The endoscope tip assembly may also include a plurality of struts which is connected by a webbing, may fold flat during insertion, and may assume a balloon-like shape during withdrawal.

Abstract: A medical imaging system including: imaging circuitry configured to capture an image; a defractive filter array mounted over the sensor circuitry and a separation device configured to adjust the distance between the defractive filter array and the sensor circuitry.

Abstract: A tuning focus apparatus designed for use with a camera coupled to a medical device is provided. The camera includes a base housing for storing an image sensor and an optical lens. The tuning focus apparatus includes a gear housing coupled to the base housing, a drive gear rotatably mounted to the gear housing, a driven gear rotatably mounted to the gear housing and connected to the drive gear, a gear rack disposed in the base housing and engaged with the driven gear, and a board coupled to the gear rack and designed to secure the image sensor thereon. Rotational movement of the drive gear drives the driven gear to slidably adjust the gear rack, thereby adjusting a separation distance between the image sensor and optical lens.

Abstract: An optical system for a stereo video endoscope including: first and second lens system channels each having optical elements in identical configurations, the optical elements being arranged in a same position along first and second optical axes, respectively, an optical axis of first and second optical elements coincide with the first and second optical axes, respectively, first and second cross-sectional areas of the first and second optical elements are inscribed in first and second circumferential circles, respectively, centers of first and second circumferential circles each coincide with the first and second optical axes, respectively, to define a maximum radius of the first optical element and the second optical element, the first and second circumferential circles overlap one another, and circumferential shapes of the first and second optical elements deviate from the first and second circumferential circles circumscribing them such that the first and second optical elements do not contact.

Abstract: An endoscope includes: a plurality of wires each having a distal end connected to a bending portion of an insertion portion and a proximal end extending into an operation portion; one or more tubular members provided on the operation portion and including a first part extending in a direction of a longitudinal axis of the insertion portion, a second part provided on a proximal end side of the first part and extending in a side direction to the longitudinal axis, and a bent part connecting the first part and the second part, any one of the plurality of wires being inserted into the one or more tubular members, the first part and the second part being fixed to the operation portion; and a stopper fixed in the operation portion and arranged to prevent movement of the bent part by abutting on an inside of bending of the bent part.

Abstract: A bending section (5) for an endoscope (1) and the endoscope, where the bending section comprises a number of segments (12), where adjacent segments are connected by a first hinge (14) and a second hinge (24). Both the first and the second hinges are made integrally from the same material as the segments (12), and the first and second hinges are arranged for allowing the connected segments to bend in a bending plane. A second hinge at the distal end of a segment forms a continuous rib (44) with the second hinge (24) at the proximal end of the segment. This continuous rib is arranged perpendicular to the bending plane.

Abstract: An endoscope, including: a handle, a sheath tube, an endoscopic cannula, and a tensioning mechanism. The sheath tube includes a first axial guide hole and a first joint pin disposed in the first axial guide hole. The handle includes a second axial guide hole and a second joint pin disposed in the second axial guide hole. The first joint pin matches and is directly connected to the second joint pin. The sheath tube matches and connects to the handle. The handle includes a cavity and the tensioning mechanism is disposed in the cavity. The endoscopic cannula includes a flexible part extending out of the sheath tube and a rigid part fixed in the sheath tube. The flexible part includes a steering wire. The first joint pin is connected to the steering wire. The tensioning mechanism is connected to the second joint pin.

Abstract: Endoscopic instruments, such as endoscopes, and devices and methods for cleaning endoscopic instruments are provided. A cleaning device for use with an endoscopic instrument comprises an elongate member configured for advancement through an internal lumen within the endoscopic instrument and a cleaning member removably coupled to a portion of the elongate member. The cleaning element comprises a variable pressure region shaped and configured to increase the hydrodynamic fluid friction force and fluid pressure force of a cleaner or detergent against the wall of the internal lumen of the endoscope to more effectively clean all internal surfaces of an endoscopic instrument, including crevasses, scratches or other irregularities, without further damaging these surfaces.

Abstract: An articulating tracheoscope control device, a laryngeal mask airway (LMA) device, and an articulating tracheoscope control device and LMA device combination system, that can control precise movement of a distal end of a tracheoscope with a patient's larynx within an angular range of at least 180 degrees and can lock the distal end of the tracheoscope in any desired position within the patient's larynx such that managing the tracheoscope during a tracheostomy procedure is not required in order to monitor the tracheostomy procedure.

Abstract: Introduced here are diagnostic platforms able to optimize computer-aided diagnostic (CADx) models by simulating the optical performance of an imaging device based on its mechanical components. For example, a diagnostic platform may acquire a source image associated with a confirmed diagnosis of a medical condition, simulate optical performance based on design data corresponding to a virtual prototype of the imaging device, generate a training image by altering the source image based on the optical performance, apply a diagnostic model to the training image, and then determine whether the performance of the diagnostic model meets a specified performance threshold. If the diagnostic model fails to meet the specified performance threshold, the diagnostic platform can automatically optimize the diagnostic model for the imaging device by altering its underlying algorithm(s).

Abstract: An image processing device processes an image of a subject eye. The image processing device includes an image acquisition unit that acquires an image of the subject eye, a diagnosis unit that obtains a diagnosis result of the subject eye based on the image acquired by the image acquisition unit, and a display control unit that changes a display mode of a display unit based on the diagnosis result.

Abstract: An OCT apparatus includes an OCT optical system that has a light splitter splitting light from an OCT light source to light travelling to a measurement light path and light travelling to a reference light path and a detector detecting a spectrum interference signal of measurement light guided to a subject eye through the measurement light path and reference light from the reference light path, and a processing unit that processes the spectrum interference signal to generate OCT data. The processing unit performs at least complementary processing on an overlapping region of a real image and a virtual image in OCT data based on a plurality of OCT data obtained with different optical path lengths when detecting the spectrum interference signal, and generates OCT data subjected to the complementary processing.

Abstract: The method comprises storing a set of images captured of the anterior chamber of various eyes, and using a processor for: a) processing some of said stored images by implementing an homogenization process that adjusts an horizontal and a vertical spatial resolution of each image of the set to be the same, and a centering and aligning process that computes statistical properties of the images, and uses said computed statistical properties to compute a centroid and a covariance matrix of each image; b) performing pair-wise distance measures between images of said processed images providing a pair-wise distance matrix; c) analyzing said pair-wise distance matrix by executing a nonlinear dimensionality reduction algorithm that assigns a point in an n-dimensional space associated to each analyzed image; and d) outputting the results of said analysis in a visual way enabling being usable to detect if said eyes suffer from glaucoma.

Abstract: Improved optical coherence tomography systems and methods to measure thickness of the retina are presented. The systems may be compact, handheld, provide in-home monitoring, allow the patient to measure himself or herself, and be robust enough to be dropped while still measuring the retina reliably.

Abstract: The present disclosure provides methods and systems for high-resolution functional magnetic resonance imaging (fMRI), including real-time high-resolution functional MRI methods and systems.

Abstract: In an optical coherence tomography apparatus that generates a full-color optical coherence tomographic image, an image generation unit includes a correction processing unit that calculates an attenuation related value related to attenuation of signal intensity of the interference light of three R, G, and B colors in a first depth region and corrects the signal intensity of a second depth region deeper than the first depth region according to the attenuation related value to calculate a correction signal for the interference light and generates a full-color optical coherence tomographic image using the correction signals calculated for each of R, G, and B.

Abstract: Described herein are apparatuses for dental scanning and components of apparatuses for dental scanning. A component of a dental scanning apparatus may include a beam splitter, a transparency and an image sensor. The component may have a first surface and a second surface. The transparency may be affixed to the first surface of the beam splitter, and may comprise a spatial pattern disposed thereon and be configured to be illuminated by a light source of the dental scanning apparatus. The image sensor may be affixed to the second surface of the beam splitter, wherein as a result of the transparency being affixed to the first surface of the beam splitter and the image sensor being affixed to the second surface of the beam splitter, the image sensor maintains a stable relative position to the spatial pattern of the transparency.

Abstract: An optical probe, instrument, and method for measuring a tissue sample. The optical probe comprises a needle having a needle tip formed to penetrate a tissue surface and an optical waveguide arranged to transmit light through the needle; and a probe housing for holding the needle and comprising at least one of an actuator or a sensor configured to receive or generate a depth signal to determine a depth position of the needle tip relative to the tissue surface.

Abstract: The instrument according to the invention for electrosurgically impacting biological tissue comprises an electrode (18) as well as a light guide (21), which is connected to a light inlet window (19), which is formed by means of a fluid body (27). The light guide is connected to a light analysis device (13), so as to absorb the light, which is generated at the electrode (18) in response to the HF surgery and so as to supply it to the light analysis device (13). The light inlet window (19) is arranged at the point of origin of the light, namely immediately at the electrode, that is, at the spark, which is generated. An adulteration of the absorbed light by means of smoke or particle deposition on the light inlet window (19) can virtually be avoided.