Abstract: The invention describes a laser sensor module (100) for particle density detection. The laser sensor module (100) comprising at least one first laser (110), at least one first detector (120) and at least one electrical driver (130). The first laser (110) is adapted to emit first laser light in reaction to signals provided by the at least one electrical driver (130). The at least one first detector (120) is adapted to detect a first self-mixing interference signal of an optical wave within a first laser cavity of the first laser (110). The first self-mixing interference signal is caused by first reflected laser light reentering the first laser cavity, the first reflected laser light being reflected by a particle receiving at least a part of the first laser light. The laser sensor module (100) is adapted to reduce multiple counts of the particle. The invention further describes a related method and computer program product.

Abstract: A system for tissue inspection is provided, comprising a console (50) with a light source (64), a spectrometer (66), an optical switch (65) and a processing unit. The system further comprises an elongated shaft (10), wherein an illumination fiber (40), a plug (50) in front of the illumination fiber (40), and a detection fiber (41) is provided in the elongated shaft (10). The illumination fiber (40) is capable of transmitting light from the light source (64) to its front surface and is capable of transmitting light being back-reflected from the plug (50) to the optical switch (65). The detection fiber (41) is capable of transmitting light reflected from tissue in front of the distal end surface of the elongated shaft (10) to the optical switch (65). The optical switch (65) is configured to provide the back-reflected light to the spectrometer (66) for generating a reference spectrum and to provide the light reflected from the tissue to the spectrometer (66) for generating a diffuse reflectance spectrum.

Abstract: A luminescent composition includes a host matrix sensitized by Ce3+ and showing emission in the ultraviolet range. Typical host matrices include fluorides, sulphates, and phosphates, in particular A(Y1-x-yLuxLay)F4, A(Y1-x-yLuxLay)3F10, BaCa(Y1-x-yLuxLay)2F10, and Ba(Y1-x-yLuxLay)2F8, wherein A=Li, Na, K, Rb, or Cs. One or more of these luminescent compositions may be applied as a ceramic or single crystalline converter for CT, PET or SPECT scanners, or as a luminescent powder layer for x-ray intensifying screens.

Abstract: A surface treatment device (100) is disclosed that comprises a conduit (110) including an air inlet (105) and an air outlet (115). The conduit comprises a reactive particles generator (130) for generating reactive particles from air and arranged to subject the surface to the generated reactive particles. The reactive particles generator (130) is also used for generating an air flow from the air inlet to the air outlet through the conduit.

Abstract: A particle sensor uses an electrostatic particle charging section in the form of an ionization chamber. A flow sensor arrangement is used to produce a signal which is representative of the amount of gas flow between the outside of the ionization chamber and the inside of the ionization chamber. This information is indicative of the flow conditions, and can be used to determine when adverse flow conditions are present which may adversely affect the performance or lifetime of the particle sensor.

Abstract: The invention relates to a detection apparatus for detecting radiation. The detection apparatus comprises a GOS material (20) for generating scintillation light depending on the detected radiation (25), an optical filter (24) for reducing the intensity of a part of the scintillation light having a wavelength being larger than 650 nm, and a detection unit (21) for detecting the filtered scintillation light. Because of the filtering procedure relatively slow components, i.e. components corresponding to a relatively large decay time, of the scintillation light weakly constribute to the detection process or are not detected at all by the detection unit, thereby increasing the temporal resolution of the detection apparatus. The resulting fast detection apparatus can be suitable for kVp-switching computed tomography systems.

Abstract: The present invention relates to a direct conversion radiation detector for wherein the direct conversion material comprises a garnet with a composition of Z3(AlxGay)O12:Ce, wherein Z is Lu, Gd, Y, Tb or combinations thereof and wherein y is equal to or greater than x; and preferably Z comprises Gd. Suitable garnets directly convert radiation, such as x-rays or gamma-rays, into electronic signals. Preferably photoluminescence of the garnet is low or absent. The detector is particularly suitable for use in x-ray imaging devices, such as computed tomography. In some embodiments photoluminescence of garnets might be used to construct a hybrid direct-indirect conversion detector, which may be particularly suitable for use with Time-of-Flight PET.

Abstract: The present invention relates to a direct conversion radiation detector for wherein the direct conversion material comprises a garnet with a composition of Z3(AlxGay)O12:Ce, wherein Z is Lu, Gd, Y, Tb or combinations thereof and wherein y is equal to or greater than x; and preferably Z comprises Gd. Suitable garnets directly convert radiation, such as x-rays or gamma-rays, into electronic signals. Preferably photoluminescence of the garnet is low or absent. The detector is particularly suitable for use in x-ray imaging devices, such as computed tomography. In some embodiments photoluminescence of garnets might be used to construct a hybrid direct-indirect conversion detector, which may be particularly suitable for use with Time-of-Flight PET.

Abstract: An air purification device (100), a lighting device and a luminaire are provided. The air purification device comprises an air inlet (132), an air outlet (134), a photocatalytic volume (150), a first solid state light emitter (102) and a second solid state light emitter (122). The air inlet receives an air flow (140). The photocatalytic volume comprises a photocatalytic material and the air flow flows through the photocatalytic volume to contact some air with the photocatalytic material. The photocatalytic volume is between the air inlet and the air outlet. The photocatalytic material is a catalyst under the influence of UV light in photoreactions between gasses in the air flow. The first solid state light emitter emits UV light towards the photocatalytic volume. The second solid state light emitter emits deep blue light towards the photocatalytic volume. The deep blue light has a peak wavelength in between (400) nanometer and (450) nanometer.

Abstract: A system for tissue inspection is provided, comprising a console (50) with a light source (64), a spectrometer (66), an optical switch (65) and a processing unit. The system further comprises an elongated shaft (10), wherein an illumination fiber (40), a plug (50) in front of the illumination fiber (40), and a detection fiber (41) is provided in the elongated shaft (10). The illumination fiber (40) is capable of transmitting light from the light source (64) to its front surface and is capable of transmitting light being back-reflected from the plug (50) to the optical switch (65). The detection fiber (41) is capable of transmitting light reflected from tissue in front of the distal end surface of the elongated shaft (10) to the optical switch (65). The optical switch (65)) is configured to provide the back-reflected light to the spectrometer (66) for generating a reference spectrum and to provide the light reflected from the tissue to the spectrometer (66) for generating a diffuse reflectance spectrum.

Abstract: The invention provides a sensor device which comprises an input flow channel (10) for receiving a gas flow with entrained matter to be sensed. A thermophoretic arrangement (14a, 14b) is used to induce a thermophoretic particle movement from a first, warmer, region (16) of the input flow channel to a second, cooler, region (18) of the input flow channel (10). A sensor (24) comprises a particle sensor component at or downstream of the first region (16) of the input flow channel (10). The invention provides the benefit of pre-filtering (e.g. removal of most suspended solids/liquids) without the need for a physical filter that can become blocked.

Abstract: An air purifier filter system comprises an air purifier filter unit and a machine readable identifier which provides information concerning the filter unit type and performance information specific to a target pollutant to be filtered by said air purifier filter unit from a plurality of different pollutants that can be filtered by that filter unit type. This information can be used to provide an end of life prediction for the filter unit or provide advice that the filter should be changed for other reasons. This enables the user to be given advance warning, and to be given instructions when it is time to change the filter unit. The instructions to change the filter unit may be more accurate than a simple timer as they can take account of the type of filter unit and the performance information. In some examples the use history of the filter unit may also be used to predict the time when it should be changed.

Abstract: In various embodiments, an air quality-monitoring system (100) may include at least one sensor (106) configured to detect operation of a mechanism (110) within or at a boundary of an indoor environment. The mechanism may be external to an air purifier (102) associated with the indoor environment. The system may include a persistent memory (124) for storing data about the indoor environment observed by the at least one sensor (106).

Abstract: A capture device for capturing a target gas from a gas flow is disclosed that can be continuously used without requiring consumption of target gas binding salts. To this end, the device is arranged to generate separate acidic and alkaline streams of fluid by electrolyzing water, binding the target gas to the hydroxide ions in the alkaline fluid stream or the hydronium ions in the acidic stream, and recombining the generated streams to release the bound target gas and regenerating part of the electrolyzed water for further electrolysis. Such a capture device may for instance be used in a gas purification system, e.g. an air purification system for controlling target gas levels in a confined space such as a vehicle cabin, domestic dwelling or office space, a target gas generation system or a target gas enrichment system, e.g. for creating target gas-rich air for horticultural purposes. A method for capturing target gas from a gas flow and optionally utilizing the captured target gas is also disclosed.

Abstract: The invention provides a lighting device comprising a plurality of solid state light sources and an elongated ceramic body having a first face and a second face defining a length (L) of the elongated ceramic body, the elongated ceramic body comprising one or more radiation input faces and a radiation exit window, wherein the second face comprises the radiation exit window, wherein the plurality of solid state light sources are configured to provide blue light source light to the one or more radiation input faces and are configured to provide to at least one of the radiation input faces a photon flux of at least 1.0*1017 photons/(s·mm2), wherein the elongated ceramic body comprises a ceramic material configured to wavelength convert at least part of the blue light source light into at least converter light, wherein the ceramic material comprises an A3B5O12:Ce3+ ceramic material, wherein A comprises one or more of yttrium (Y), gadolinium (Gd) and lutetium (Lu), and wherein B comprises aluminum (Al).

Abstract: A ceramic or polycrystalline scintillator composition is represented by the formula (LuyGd3-y)(GaxAl5-x)O12:Ce; wherein y=1±0.5; wherein x=3±0.25; and wherein Ce is in the range 0.01 mol % to 0.7 mol %. The scintillator composition finds application in the sensitive detection of ionizing radiation and may for example be used in the detection of gamma photons in the field of PET imaging.

Abstract: A sensor system is for sensing a substance in a fluid (1), comprising a first sensor (10) and a second sensor (12) of the same type. The first sensor (10) is used until a calibration event, during which the second sensor (12) is used. The second sensor (12) is used only during the calibration event. The first sensor (10) is calibrated using the sensor information from the second sensor (12).

Abstract: A radiation detection device detects gamma or x-ray radiation quanta with improved timing accuracy and improved energy resolution. The radiation detection device finds application in the detection of gamma and x-ray radiation and may be used in the field of PET imaging, and in spectral CT. The radiation detection device includes a semiconductor scintillator element and a photodetector. The photodetector is in optical communication with the scintillator element. The scintillator element has two mutually opposing faces; a cathode is in electrical communication with one of the two faces and an anode is in electrical communication with the other of the two faces.

Abstract: An air purification device (100), a lighting device and a luminaire are provided. The air purification device comprises an air inlet (132), an air outlet (134), a photocatalytic volume (150), a first solid state light emitter (102) and a second solid state light emitter (122). The air inlet receives an air flow (140). The photocatalytic volume comprises a photocatalytic material and the air flow flows through the photocatalytic volume to contact some air with the photocatalytic material. The photocatalytic volume is between the air inlet and the air outlet. The photocatalytic material is a catalyst under the influence of UV light in photoreactions between gasses in the air flow. The first solid state light emitter emits UV light towards the photocatalytic volume. The second solid state light emitter emits deep blue light towards the photocatalytic volume. The deep blue light has a peak wavelength in between (400) nanometer and (450) nanometer.

Abstract: A luminescent concentrator for solar light is provided. The luminescent concentrator comprises a wavelength-selective filter, an energy concentrating area, and a luminescent material. The wavelength-selective filter is adapted to pass the solar light and to reflect light emitted by the luminescent material. Further, a method for concentrating solar light is provided. The method comprises the steps of (a) passing incident solar light through a wavelength-selective filter and an energy concentrating area onto a luminescent material, and (b) converting the incident solar light in the luminescent material to light having a wavelength reflectable by the wavelength-selective filter. The method further comprises a step (c) of concentrating the converted light in a pre-determined area arranged between the wavelength-selective filter and the luminescent material.