Abstract: Aspects of the present disclosure include methods for characterizing particles of a sample in a flow stream. Methods according to certain embodiments include generating frequency-encoded fluorescence data from a particle of a sample in a flow stream; and calculating phase-corrected spatial data of the particle by performing a transform of the frequency-encoded fluorescence data with a phase correction component. In certain embodiments, methods include generating an image of the particle in the flow stream based on the phase-corrected spatial data. Systems having a processor with memory operably coupled to the processor having instructions stored thereon, which when executed by the processor, cause the processor to calculate phase-corrected spatial data from frequency-encoded fluorescence data of a particle a flow stream are also described. Integrated circuit devices (e.g., field programmable gate arrays) having programming for practicing the subject methods are also provided.

Abstract: A process is provided for the determination of oil dispersant effectiveness. A submersible dispersant sensing platform is passed across a body of water. The platform has a plurality of sensors including a multichannel fluorometer and a particle size analyser, and each sensor produces an output data stream. The body of water is continuously analysed at a predetermined depth profile below the surface of the body of water. Hydrodynamic and environmental condition data is collected proximate in time and location to the output data from the dispersant sensing platform. The environmental condition data includes one or more of ambient temperature, body or water temperature, salinity of the body of water, wind speed, location, mixing energy of the body of water and derivatives thereof. Oil and dispersant data is provided which includes characteristics of the dispersant and of oil samples prior to the application of the dispersant.

Abstract: An antifouling layer stack comprising a first layer element, a silicone layer, and a second layer element. The silicone layer is a light guide for UV radiation, and may include embedded UV light sources. The first layer element is situated on a first surface of the silicone layer, and the second layer element is situated on a second surface of the silicone layer. The first and second layer elements differ in composition from the silicone layer. The first layer element facilitates transmission of the UV radiation from the silicone layer to an external medium, and may provide protection and improve the structural integrity of the stack. The second layer element may also provide protection and structural integrity. The second layer element may be reflective, and may provide an adhesive surface for attaching the stack to a vessel.

Abstract: In accordance with some embodiments, systems, methods, and media for asynchronous single photon depth imaging with improved precision in ambient light conditions are provided. In some embodiments, the system comprises: a light source; a detector configured to detect arrival of individual photons, and enter a dead time after a detection; a processor programmed to: cause the light source to emit pulses toward a scene point at the beginning of light source cycles each corresponding to B time bins; cause the detector to enter an acquisition window at a first time bin position; cause the detector to enter another acquisition window at a shifted time bin position; record photon arrival times; associate each photon arrival time with a time bin; and estimate a depth of the scene point based on a number of photon detection events at each time bin, and a denominator corresponding to each time bin.

Abstract: A camera is used in conjunction with storage phosphor paint, configured to examine a surface. The surface is coated with storage phosphor paint in some embodiments. The camera is configured to image the surface coated with the storage phosphor paint, eliminating requirement of fast relaxation times associated with conventional scanners.

Abstract: The sample imaging apparatus includes: a housing that forms a closed space; a transparent tray on which a sample is placed in the housing; a plane light source that is formed by using a flat light guide plate, which propagates light emitted by a light emitting element in a plane direction, so as to illuminates the sample with illumination light through the tray in the housing; a lens that is disposed in the housing so as to face the plane light source with the tray interposed between the lens and the plane light source and is used for imaging the sample; and an imaging control unit that adjusts a focal length of the lens and performs imaging in a case of imaging the single sample.

Abstract: According to an aspect of the present disclosure, a method of treating a textile with an antimicrobial agent over a plurality of laundry cycles each including a wash cycle and a treatment cycle is described. The method includes (a) receiving a textile in a wash system for a first laundry cycle, (b) initiating a wash cycle comprising a detergent, (c) initiating a post-detergent treatment cycle comprising dosing the textile with a solution having a predetermined concentration of an antimicrobial agent that comprises a metallic ion, and (c) repeating steps (a)-(c) for each of a plurality of additional laundry cycles. The predetermined concentration is insufficient to achieve a predetermined antimicrobial efficacy for the textile due to the first laundry cycle alone but sufficient to achieve the predetermined antimicrobial efficacy for the textile due to a combination of the first laundry cycle and one or more of the plurality of additional laundry cycles.

Abstract: A laminated fluorescent sensor includes a sealable sensor housing and an optical sensing system embedded inside the sealable sensor housing. The optical sensing system includes a light source (7), a short wave pass filter (8), an air chamber (10), a sensing unit, a long wave pass filter set (12) and an optical signal collecting unit from top to bottom all of which are coaxially set. The optical signal collecting unit is connected with a signal processing system (14); the sealable sensor housing has air inlets (2, 201) and an air pumping port (3), the air inlets (2, 201) are communicated with the air chamber (10) through an air intake passage, the air chamber (10) is communicated with the air pumping port (3) through an air pumping passage.

Abstract: A cloud-based analytics engine that analyzes data relating to an industrial automation system(s) to facilitate enhancing operation of the industrial automation system(s) is presented. The analytics engine can interface with the industrial automation system(s) via a cloud gateway(s) and can analyze industrial-related data obtained from the industrial automation system(s). The analytics engine can determine correlations between respective portions or aspects of the system(s), between a portion(s) or aspect(s) of the system(s) and extrinsic events or conditions, or between an employee(s) and the system(s). The analytics engine can determine and provide recommendations or instructions in connection with the industrial automation system(s) to enhance system performance based on the determined correlations.

Abstract: A method for counting photons using a photomultiplier includes obtaining a measurement signal from a raw signal produced by the photomultiplier by correcting the raw signal for a noise signal and/or an offset, wherein an incident photon produces a pulse in the raw signal. The measurement signal is integrated over time to form an analog integrated measurement signal. A number of photons that are incident in the photomultiplier is ascertained by comparing a value of the analog integrated measurement signal to an integral proportionality value which corresponds to a specific number of photons incident in the photomultiplier.

Abstract: A process is operable using a computerized system for grading the clarity of a diamond. The computerized system includes an optical image acquisition device, a processor, a pre-trained neural network and an output module operably interconnected together. The process includes: (i) acquiring via an optical image acquisition device one or more plural axial view images of a diamond with different focus depths; (ii) in a processor, combining the plural axial views to form one or more single optical images; (iii) in a pre-trained neural network, providing a regressive value associated with the clarity grade of the diamond based on the one or more single images acquired during step (i); and (iv) from an output module, providing a clarity grade to the diamond (i) by correlating the regression value from (ii) to a clarity grade.

Abstract: An apparatus, and method of operating the same, detects changes in biomass accumulating on a surface of a substrate while minimizing bulk effect. The apparatus includes a sensor substrate and two illumination sources. A first illumination source generates a first light having a first central wavelength. A second illumination source generates a second light having a second central wavelength different than the first wavelength. The first and second light are mixed to produce a combined light. An analyte solution is introduced to the sensor substrate. Incident light of the combined light is reflected from the sensor substrate to produce a signal. The signal is imaged with a camera to obtain a reflectance. Reflectance produced by the combined light is not affected by variations in the dielectric properties of the analyte solution. A biomass accumulated on the substrate is computed based on the reflectance.

Abstract: The illustrated embodiments of the invention include an automated method of assaying a viral and antibody analyte in a sample in a portable, handheld microfluidic reader having a SAW detector with a minimal mass sensitivity limitation. The automated method includes the steps of automatically performing the assay with the SAW detector with enhanced sensitivity as in Optikus I, but also includes the steps of automatically disposing a second portion of the sample on a microarray, selectively automatically probing the second portion of the sample for antibodies corresponding to the at least one selected virus using the microarray, and automatically reading the microarray using a fluorescent camera to identify antibodies in the second portion of the sample.

Abstract: An apparatus to detect contaminants in a fuel comprises an input to receive a fuel flow. A light scattering system is coupled to the input. An imaging system is coupled to the light scattering system. A memory is coupled to the imaging system. A processor is coupled to the memory. Output signals from the imaging and light scattering systems are transferred to the processor. The processor is configured to cause the light scattering system to monitor the light scattering intensity from the contaminants in the fuel flow. The processor is configured to cause the light scattering system to measure a light scattering intensity signal from the contaminants in the fuel flow. The processor is configured to generate a trigger signal to turn on the imaging system when the light scattering intensity is greater than a predetermined threshold.

Abstract: A catheter system includes an electronic console; a catheter having a proximal end attachable to the console and a distal end configured to house therein an optical probe; an optical fiber configured to transmit from the console to the optical probe excitation radiation of a first wavelength, and configured to return to the console an optical response signal having a second wavelength longer than the first wavelength; a detector configured to detect intensity of the optical response signal; and a processor configured to determine, based on the detected intensity of the optical response signal, whether the catheter is properly connected to the console. The optical response signal is generated within the optical fiber itself in response to transmitting the excitation radiation therethrough. The optical response signal is an auto-fluorescence signal and/or Raman scattering signal generated from the optical fiber itself.

Abstract: The present invention relates to a method for determining a growth status of a plant comprising chlorophyll, the method comprising the steps of: illuminating the plant (102) with input light including a light intensity modulation component (205, 206, 207, 208); detecting light emitted from the plant; determining (S702) an offset light intensity (204) surrounding the plant, the offset light intensity being a static component of the input light; determining (S718) a phase and a gain between the input light and the detected light, determining (S720) a growth status of the plant based on a predetermined relationship between input light and detected light, and on the phase and the gain. The invention also relates to a corresponding system and to a computer program product.

Abstract: Disclosed herein is a microparticle analyzing apparatus including a detecting portion configured to simultaneously detect a fluorescence generated from a microparticle in plural wavelength regions and a displaying portion configured to display thereon detection results in the plural wavelength regions in a form of a spectrum.

Abstract: Embodiments disclosed herein generally relate to a substrate temperature monitoring system in a substrate support assembly. In one embodiment, the substrate support assembly includes a lift pin. The lift pin has a body. The body has an interior passage and a rounded top surface configured for contacting a substrate when in use. A substrate temperature sensor disposed in the interior passage.

Abstract: A light emitting diode module comprising: at least one light emitting diode structure, an integrated reflector arrangement that comprises a reflector surface for reflecting light from a light emitting area of the light emitting diode structure. The integrated reflector arrangement further comprises a back reflection surface for diffusely reflecting light emitted via a side surface of the light emitting diode structure back to the light emitting diode structure. The back reflection surface is directly attached to at least a part of the side surface such that during operation of the light emitting diode module an emission of stray light by means of the side surface is reduced. The invention finally describes a flash module, an automotive front lighting or a projection light emitting diode system comprising at least one light emitting diode module.

Abstract: A method for desulfurizing molten steel comprising taking a sample out from molten steel after tapping from a converter or during secondary refining and analyzing the sample rapidly with high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in an oxygen atmosphere having an oxygen purity of 99.5 vol % or more to convert S in the sample into SO2 and an analyzing step wherein SO2-containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample.

Abstract: A component mounting apparatus includes a component mounting unit including a suction configured to adsorb and transport a component; a first light source configured to emit first light to the component; a second light source configured to emit second light to a Fiducial mark of a substrate; a filter configured to transmit the first light reflected by the component through the filter and reflect the second light reflected by the Fiducial mark; and an image capturer configured to detect the first light transmitted through the filter and the second light reflected by the filter.

Abstract: Fluorescence imaging system for an operating theatre, comprising a device illuminating the operating theatre and emitting a white light, and a fluorescence imaging device. Said fluorescence imaging device comprises a light source emitting radiation for excitation of a fluorescent marker in a range of emission wavelengths of between 600 and 900 nm. The light emitted by the illuminating device is filtered by a low-pass filter, of which the cut-off wavelength is below the emission range of the fluorescent marker, but is nonetheless able to show an increase or fluctuations in the attenuation for wavelengths above the emission range of the fluorescent marker, the product of the attenuation of the filter of the detector and of the attenuation of the low-pass filter of the illuminating device leading to an attenuation by a factor of at least 106.

Abstract: An optical instrument, such as a spotting scope, is provided. The optical instrument may include a range finder configured to calculate or otherwise determine a distance between the optical instrument and an identified object. The optical instrument may also include a display and a user interface. In some embodiments, an operation system associated with the optical instrument may include sensing touchless gestures. For example, hand gestures or eye gestures may be used to navigate a user interface, to actuate the laser range finder, to alter the brightness of a display, or to carry out any of a number of other operational commands.

Abstract: The invention provides an optical particle sensor which uses light sources of different first and second wavelengths. A first light source is used to detect light scattering and also to determine when a particle reaches a target positional area. In response to the particle being determined to reach the target positional area, a second light source is operated to provide a pulse of light, and light emitted from the particle in response to the pulse of light is detected by the same detector.

Abstract: Techniques for automatically eradicating microorganisms (e.g., germs, bacteria, and/or viruses) from appliance handles using ultraviolet (UV) light are provided. In one aspect, a system for eradicating biological contaminants from a handle on an appliance door is provided. The system includes a UV light emitter for producing UV disinfecting light during a cleaning cycle; and a waveguide coating on the handle, coupled to the UV light emitter, for propagating the UV disinfecting light over a surface of the handle. The system can also include a control module for controlling the UV light emitter; and at least one sensor for providing data to the control module as to when to initiate or halt a cleaning cycle. A method for eradicating biological contaminants from a handle on an appliance door using the present system is also provided.

Abstract: Security element including a first and second pattern formed by a first and second material respectively in or on a first and a second region of a substrate respectively, the first pattern partially overlapping with said second pattern, the first material comprising a first luminescent dye, which upon excitation by electromagnetic radiation falling within its excitation wavelength range emits electromagnetic radiation in a first emission wavelength range, the second material comprising a second luminescent dye, which upon excitation by electromagnetic radiation falling within its excitation wavelength range emits electromagnetic radiation in a second emission wavelength range, said first emission wavelength range overlapping with the excitation wavelength range of the second luminescent dye, so that upon irradiation within the excitation wavelength range of the first luminescent dye the second luminescent dye is excited, in the overlapping area of the patterns, to emit electromagnetic radiation in the emissio

Abstract: Embodiments relate generally to systems and methods for filtering unwanted wavelengths from an IR detector. In some embodiments, it may be desired to remove or reduce the wavelengths absorbed by water, to reduce the effects of water on the detection of the target gas. In some embodiments, a filter glass may be used in the IR detector, wherein the filter glass comprises one or more materials that contain hydroxyls in their molecular structure, and wherein the spectral absorption properties of the filter glass are operable to at least reduce wavelengths of light absorbed by water from the optical, thereby reducing the IR detector's cross sensitivity to water.

Abstract: The application provides an improved gemstone testing apparatus for testing a gemstone specimen. The gemstone testing apparatus includes a handheld casing, a processor unit, a first gemstone test device, a second gemstone test device, and a display unit. The first gemstone test device includes a first test probe and a thermal conductivity test module. The second gemstone test device includes a second test probe and a light absorption module.

Abstract: A device and a method for observing an object by imaging, or by lensless imaging. The object is retained by a holder defining an object plane inserted between a light source and an image sensor, with no enlargement optics being placed between the object and the image sensor. An optical system is arranged between the light source and the holder and is configured to form a convergent incident wave from a light wave emitted by the light source, and for forming a secondary light source, conjugated with the light source, positioned in a half-space defined by the object plane and including the image sensor, such that the secondary source is closer to the image sensor than to the holder. This results in an image with a transversal enlargement factor having an absolute value of less than 1.

Abstract: A masking apparatus surrounds a specimen and eliminates the presence of voids and gaps between a specimen and a radiation sensitive imaging surface. Voids and gaps allow radiation to become trapped or diffracted therein and lead to noise in the resulting image. A system of radiological imaging associates both a filter and a masking assembly to a specimen for an optimal radiation exposure that permeates the specimen to an imaging array there under.

Abstract: The invention relates to systems and methods for observing materials, such as living cells or organisms, wherein the systems and methods utilize a microscopy system having an illumination source and an objective lens. A specimen including a predetermined amount of a liquid medium and a predetermined amount of an extracellular strongly absorbing dye is positioned for observation using the microscopy system. The illumination of the specimen correlates to the spectral region around the peak of the dye absorbance for the dye used in the system, such that live cells and organisms appear in contrast over a dark background for observation.

Abstract: The radiation detection device is equipped with a sample holding unit; an irradiation unit for irradiating a sample held on the sample holding unit with radiations; a detection unit for detecting the radiations generated from the sample; an illumination unit for irradiating the sample with light; an observation unit for observing the sample; and a light transmitting plate for allowing the light from the illumination unit, with which the sample held on the sample holding unit is irradiated, to be transmitted therethrough. The light transmitting plate is disposed at a position between the sample holding unit and the irradiation unit, and has an opening portion for allowing the radiations from the irradiation unit, with which the sample is irradiated, to pass therethrough and a scattering portion for scattering light.

Abstract: A dual function fluorometer-absorbance sensor features an absorbance-based sensor configured to receive one part of an optical signal transmitted through a body of water of interest along an optical beam transmission path, and determine absorbance-based sensor signaling containing information about an absorbance of the optical signal by one or more absorbance species of interest present in the body of water; and a fluorescence-based sensor configured to receive another part of the optical signal transmitted through the body of water of interest along a corresponding optical beam transmission path that is perpendicular to the optical beam transmission path, and determine fluorescence-based sensor signaling containing information about a fluorescence transmitted by one or more fluorophore species of interest present in the body of water.

Abstract: A diamond identification apparatus relates to the field of examining natural and synthetic diamonds.

Abstract: Disclosed herein are systems and methods configured for real-time multi-parameter monitoring of fluid systems associated with metal-working equipment. The disclosed fluid monitoring systems are configured to acquire in real time multiple parameters associated with the well-being of fluid systems of metal-working equipment. The data acquired in real-time can also be provided to remote devices to allow off-site personnel to monitor metal-working equipment. The fluid monitoring systems can also include fluorescence probes configured to determine fluid concentration and/or soil load values using fluorescence. The fluorescence probes can provide excitation light and detect emission light forming a small angle with respect to one another, emission light coming from a surface of the metal-working fluid.

Abstract: Currency is selectively illuminated with Ultraviolet (UV) light, Infrared (IR) light, and/or white light in front of a camera, which may be integrated into a scanner in some embodiments. The camera takes an image of the illuminated currency and the image is presented on a screen of a display for validating the currency.

Abstract: A catheter system includes an electronic console; a catheter having a proximal end attachable to the console and a distal end configured to house therein an optical probe; an optical fiber configured to transmit from the console to the optical probe excitation radiation of a first wavelength, and configured to return to the console an optical response signal having a second wavelength longer than the first wavelength; a detector configured to detect intensity of the optical response signal; and a processor configured to determine, based on the detected intensity of the optical response signal, whether the catheter is properly connected to the console. The optical response signal is generated within the optical fiber itself in response to transmitting the excitation radiation therethrough. The optical response signal is an auto-fluorescence signal and/or Raman scattering signal generated from the optical fiber itself.

Abstract: The flow cell is composed of a cell block and a cell holder. The cell block is light transmittable and is provided with a plurality of cells communicated with each other and mutually different in optical path length and an inlet and an outlet communicated with the cell. The plurality of cells include a short optical path length cell having an optical path length of 100 ?m or less. The short optical path length cell is constituted by a groove formed on an inner joining surface of a plurality of laminated light transmitting substrates. The optical path length of the short optical path length cell is defined by a depth of the groove. The cell holder is configured to accommodate the cell block therein, and is provided with an incident window for allowing light to enter the cell block and an emission window for emitting the light transmitted through the cell block.

Abstract: Described herein are systems and methods for coupling environmental hazard detection and actuation of a wearable chemical sensor at a molecular level. The chemical sensor may be a wearable chemical sensor implemented as a powder, cream, lacquer or other wearable construct. The wearable chemical sensor may detect exposure to various environmental hazards and provide an analog means (e.g., a range of color changes) of indicating the level of environmental hazard exposure.

Abstract: The present disclosure is directed to an obstacle awareness device for vehicle systems. A threshold distance is set that identifies the range at which an obstruction interferes with fluid dynamics around and through at least one propulsion motor. One or more ranging sensors on the vehicle system detect relative position information of the obstruction when it is within the threshold distance. The relative position information is communicated to a controller, which adjusts a motor control signal to compensate for the obstruction interfering with the fluid dynamics around the at least one propulsion motor. The threshold distance may be defined by a three dimensional shape that encapsulated the vehicle system 100, and the three dimensional shape may change in shape or size with movement of the vehicle system.

Abstract: A scanning microscope includes a light source for generating a light beam having a wavelength, ?, and beam-forming optics configured for receiving the light beam and generating a quasi-Bessel excitation beam that is directed into a sample. The quasi-Bessel beam has a lateral FWHM and an axial FWHM that is greater than ten times the lateral FWHM, and the beam-forming optics include an excitation objective having an axis oriented in a first direction. The microscope includes beam scanning optics configured for scanning the quasi-Bessel beam in one or more directions that are substantially perpendicular to the first direction, and a detector configured for detecting signal light received from positions within the sample that are illuminated by the quasi-Bessel beam. The signal light is generated in response to an interaction of the excitation beam with the sample, and the signal light is imaged, at least in part, by the excitation objective, onto the detector.

Abstract: In methods of high-resolution imaging a structure of a sample, the structure being marked with fluorescence markers, the sample is subjected to a light intensity distribution including an intensity maximum of focused fluorescence excitation light to selectively scan partial areas of interest of the sample. Fluorescence light emitted out of the sample is registered and allocated to a respective location of the light intensity distribution in the sample. The subjection of the sample to at least one part of the light intensity distribution is terminated at each location of the light intensity distribution, if at least one criterion of the following criteria is met: (a) a predetermined maximum light amount of the fluorescence light emitted out of the sample has been registered, and (b) a predetermined minimum light amount of the fluorescence light emitted out of the sample has not been registered within a predetermined period of time.

Abstract: A method of extracting particles from a two-dimensional (2D) hologram recorded as part of a digital inline holography system includes reconstructing a three-dimensional (3D) optical field from the recorded 2D hologram. In addition, particles are extracted/segmented from the 3D optical field, wherein segmented particles are identified by particle location in three-dimensional space and a cross-sectional area of the segmented particle. Based on the identified particle location and cross-sectional area, extracted particles are removed from the 2D hologram to generate an updated 2D hologram. These steps are repeated iteratively until a threshold is met.

Abstract: A continuous liquid interface production system includes a source of optical stimulation. The system includes a vessel configured to retain a pool or film of optically sensitive monomer and a substantially optically transparent plate retained by the vessel. The optical stimulation is directed through the plate and into the pool or the film based upon a sliced 3D model of the part. The system includes source of reaction inhibitor wherein the substantially optically transparent plate allows the reaction inhibitor to permeate through the plate and into the pool or the film such that a sufficient amount of reaction inhibitor is within the pool or the film to create a zone proximate the plate that prevents polymerization therein.

Abstract: An electronic component picked up and held by a mounting head of a component mounter is moved to an imaging position above a component imaging camera, the tip of the lead of the electronic component is imaged from below by the camera to acquire a lead image, and the lead image is inputted into an image recognition device configured from a neural network or the like and imaged processed so as to output the center position of the tip of the lead. Here, whenever an image processing error occurs, the lead image for which the image processing error occurred is displayed on a display device, and an operator specifies the center position of the tip of the lead in the lead image display on the display device and the specified center position is inputted into the image recognition device.

Abstract: The invention concerns an aircraft propulsion system having an engine core within which fuel is combusted to produce an exhaust containing water produced from the combustion of fuel, at least one propulsive fan for generating a mass flow of air which mixes with the exhaust of the engine core, and one or more sensor arranged to sense a condition indicative of vapor trail formation by the exhaust flow from the engine; and a controller arranged to control the ratio of the mass flow of water in the exhaust to the mass flow of air propulsed by the propulsive fan such that the ratio is reduced upon sensing of said condition by the one or more sensor.

Abstract: The SACOS apparatus solves counterfeiting issues instantaneously and develops new security features in order to improve the role that international regulatory commissions, governments, and central banks play to effectively fight counterfeiting.

Abstract: A line-of-sight (LOS) speed calculator obtains a LOS speed of particles traveling with the atmosphere. A LOS direction corrector corrects a LOS direction using attitude angle information. A wind vector calculator calculates a wind vector expressed with a wind direction and wind speed of the atmosphere at a measurement point by using LOS data including a set of the corrected LOS direction corrected by the LOS direction corrector and the LOS speed obtained by the LOS speed calculator. A shift detection range changer changes a shift detection range that is a divided range of the received signal in the time-domain used for obtaining the Doppler frequency shift to correspond to a range of the received signal reflected by particles at altitudes within a predetermined range including an altitude of the measurement point, on the basis of the attitude angle information.

Abstract: [Object] To reduce the influence on a visible light LED exerted by ultraviolet light applied by an ultraviolet light LED. [Solution] A linear light source including an ultraviolet light emitting diode (1a), a visible light emitting diode (3a), and a light guide (5). The ultraviolet light emitting diode (1a) and the visible light emitting diode (3a) are disposed at least at one end in an optical axis direction of the light guide (5), and are disposed with an optical axis shifted and by providing a level difference in the optical axis direction. Here, the ultraviolet light emitting diode (1a) and the visible light emitting diode (3a) are mounted on an inverted L-shaped heat sink (6a), and an ultraviolet light blocking filter (2) is disposed in front of the visible light emitting diode (3a).

Abstract: Provided is a zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body comprises at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide, and a composite oxide of zirconium and vanadium.