Abstract: Provided is a method of inactivating bacteria and/or viruses in a target space using ultraviolet light having wavelengths less than 240 nm, while suppressing the progress of deterioration of a plant. The present invention is a method of inactivating bacteria and/or viruses in a target space where a plant is placed, the method includes a process (a) of irradiating the target space with ultraviolet light having light intensity in a wavelength band belonging to within a range from 190 nm to 235 nm from an ultraviolet light source during a time period when the plant is irradiated with sunlight or visible light from an illumination light source.

Abstract: A culture vessel has a culture space therein and may culture cells in the culture space. The culture vessel includes a main flow path extending within a plane, and a secondary flow path that is adjacent to the main flow path in a direction perpendicular to the plane, extends in a direction intersecting the main flow path when viewed from a direction perpendicular to the plane, and partially overlaps the main flow path. The secondary flow path has a groove that is open to and communicates with the main flow path in an area where the secondary flow path overlaps the main flow path, and the culture space is a space within the main flow path, the space being opposed to a contact surface where the secondary flow path is in contact with the main flow path in the area where the secondary flow path overlaps the main flow path.

Abstract: A holding mechanism includes a suction section and a sealing section. The suction section includes a suction area where a substrate is subjected to vacuum suction. The sealing section includes an elastic section having a plurality of sides arranged to surround the suction area and a plurality of corners each formed between adjacent ones of the plurality of sides, and a repulsive-force-suppressing section provided in at least one of the plurality of corners.

Abstract: A nitride semiconductor light-emitting device includes: a first conductivity-type nitride semiconductor layer, an active layer located over the first conductivity-type nitride semiconductor layer, a second conductivity-type nitride semiconductor layer located over the active layer, a current constriction layer located in a part of the second conductivity-type nitride semiconductor layer, and a transparent conductive layer located on the second conductivity-type nitride semiconductor layer and transparent to light generated from the active layer.

Abstract: Pulsed light in which an elapsed time in a pulse and a wavelength of light correspond to each other on a one-to-one basis is emitted from a pulsed light source and radiated to a product multiple times, and a plurality of beams of the pulsed light transmitted through the product is incident on a light receiver. An output of the light receiver is digitized by an AD converter, values at times regarded as having the same wavelength in beams of the pulsed light are integrated by an FPGA as an integration unit, and then the integrated value is input to a calculator, an absorption spectrum is calculated by a measurement program, and a quality determination program quantifies a specific component to determine quality of a product.

Abstract: The ultraviolet light irradiation device includes a light source section having a light emission surface emitting ultraviolet light having a wavelength band from 190 nm to 235 nm, a controller that controls lighting of the light source section, and a distance sensor that measures a separation distance from the light emission surface to an object facing the light emission surface. The controller is provided with a plurality of lighting operation modes. Each of the plurality of lighting operation modes is determined corresponding to a section defined by the separation distance, and is set such that an amount of the ultraviolet light emitted from the light source section differs from each other. The controller controls to switch the lighting operation mode based on a signal from the distance sensor.

Abstract: The xenon lamp for a projector, the xenon lamp comprises a light-emitting tube and an anode and a cathode that are arranged inside the light-emitting tube so as to face each other through a gap in a first direction, the anode including: a body part and a chip part whose cross-sectional area cut along a first plane orthogonal to the first direction is smaller than the cross-sectional area of the body part, the chip part including: a first part joined to the body part, the first part protruding toward the cathode and having a tapered shape; and a second part joined to the first part, the second part protruding toward the cathode and having a shape such that an angle of inclination of an outer profile of the second part differs from an angle of inclination of an outer profile of the first part.

Abstract: A light source unit includes a plurality of light source devices connected together, wherein each of the plurality of light source devices comprises: a substrate on which a plurality of solid state light sources are disposed; a heat radiator including a joint surface joined to the substrate, a connecting part connected to any of the other light source devices, and a radiating fin for dissipating heat of the substrate; a housing to accommodate the radiating fin, the housing having, near the radiating fin, a first opening for distributing a gas; and a fan to distribute the gas to the radiating fin, and wherein the first openings of the light source devices different from each other are opposed to each other so that a clearance for distributing the gas is provided therebetween.

Abstract: A debris mitigation device includes a static foil trap. The static foil trap includes an enclosure section, a plurality of foils, an inlet hole, and a pressure-increasing mechanism. The enclosure section includes an incident opening where light emitted from the light source enters, an emission opening where the light is emitted, and an internal space where the light travels. The foils are fixed in an area of the internal space. The inlet hole is configured to be communicated with the internal space, and allow a transparent gas transparent to the light to flow into the internal space. The pressure-increasing mechanism includes at least one of an incident-side member and an emission-side member disposed at the incident opening and the emission opening, respectively, in a manner that opening areas thereof are reduced without blocking a traveling of the light, and increases a pressure of the internal space.

Abstract: A foil trap cover device surrounds the outer periphery of a rotary foil trap and collects debris scattered from the rotary foil trap. The rotary foil trap has a plurality of rotating foils and is arranged near a plasma, which is generated by a plasma generation unit. The rotary foil trap passes light emitted from the plasma and captures debris generated from the plasma. The foil trap cover device includes a cover body that surrounds the outer periphery of the rotary foil trap, and a cover heating unit that is provided to at least a part of a second surface of the cover body to heat the cover body. The second surface faces the plasma and is opposite to a first surface facing the foils. The foil trap cover device also includes a heating unit protection member that covers the cover heating unit.

Abstract: Provided is a method for inactivating microorganisms and/or viruses present in a specific space in which a person is present, by emitting light in a wavelength range for inactivating microorganisms and/or viruses in the space, the method comprising: a detection step of detecting a person present in an irradiation space; an acquisition step of acquiring an accumulated irradiation amount of an irradiation amount of the light irradiated to the detected person in a period from a predetermined reference time point to a current time point; a determination step of determining an allowable maximum irradiation amount by comparing an allowable limit value (TLV: Threshold Limit Value) of an irradiation amount of the light in the wavelength range with the accumulated irradiation amount; and an irradiation step of controlling a light source and irradiating the light into the irradiation space with the allowable maximum irradiation amount as an upper limit.

Abstract: The lighting circuit for lighting a dielectric barrier discharge lamp includes a direct-current power source, a transformer having a primary winding connected to a positive electrode-side terminal of the direct-current power source and a secondary winding connected to the dielectric barrier discharge lamp, a closed circuit in which the direct-current power source, the primary winding, and a switching element including a parasitic diode are serially connected, and a controller to perform ON/OFF control of the switching element. The controller executes a first step to shift the switching element from an ON state to an OFF state and a second step to shift the switching element from the OFF state to the ON state after a lapse of a predetermined OFF holding time from when a regenerative current flowing through the primary winding reaches a zero value after the first step.

Abstract: A light source apparatus includes a disk-shaped rotation body, a raw material supply mechanism, a chamber body, and a foil trap. The raw material supply mechanism supplies a front surface of the rotation body with liquid raw material that is irradiated with an energy beam to generate plasma. The chamber body includes a beam introduction section that introduces the energy beam, a radiation extraction section that extracts radiation from the plasma that has been generated, and a plasma generation section that accommodates the rotation body. The foil trap includes a shaft member rotatably disposed in the chamber body and a plurality of foils radially arranged around the shaft member, and the plurality of foils is arranged between the rotation body and the radiation extraction section to capture debris that has been generated from the plasma.

Abstract: Disclosed herein are a microfluidic device that has a simple structure and is capable of performing perfusion culture and forming a cell layer barrier keeping a uniform cell density and a method for using such a microfluidic device. A microfluidic device includes a first substrate, a second substrate partially bonded to the first substrate, a first channel, a second channel, and a third channel which extend between the first substrate and the second substrate, first channel ports and connected to the first channel, at least one second channel port connected to the second channel, and at least one third channel port connected to the third channel, wherein a principal surface-side wall surface of the first channel is closer to a principal surface than a principal surface-side wall surface of the second channel and a principal surface-side wall surface of the third channel.

Abstract: A semiconductor laser device includes a submount and an edge-emitting semiconductor laser chip mounted to the submount by a junction-down method. The semiconductor laser chip includes a semiconductor substrate, a stacked growth layer in which m (m?1) laser resonators are formed, m P electrodes, and an N electrode. When a beam emission direction is denoted as a z-axis, a direction of the thickness of the semiconductor substrate as a y-axis, and a direction orthogonal to the z-axis and the y-axis as an x-axis, the m laser resonators are located in an area of the stacked growth layer except directly under a center of the second face of the semiconductor substrate in the x-axis direction. More preferably, the m laser resonators are located on the side opposite to the center of the second face of the semiconductor substrate when viewed from the center of the first face thereof.

Abstract: The infrared LED element has a peak wavelength in a range from 1000 nm to 2000 n m inclusive and includes: an InP substrate having a semi-insulating property; a first semicon ductor layer of a conduction type that is a p-type or an n-type, being formed on top of the In P substrate; an active layer formed on top of the first semiconductor layer; a second semico nductor layer of a conduction type different from the first semiconductor layer, being forme d on top of the active layer; a first electrode formed on top of the first semiconductor layer, being in an area where the active layer is not formed; and a second electrode formed on top of the second semiconductor layer, being disposed at a place apart from the first electrode in a direction parallel to a surface of the InP substrate.

Abstract: Provided is a high-speed and high-accuracy tablet spectroscopic measurement technology that enables total inspection. A pulsed light irradiation system irradiates a tablet being linearly moved by a movement mechanism with pulsed light in which an elapsed time in each pulse and a wavelength correspond to each other on a one-to-one basis, the output from a light receiver that has received transmission light from the tablet is input to a calculation means via an AD converter and an FPGA as an integration means, and a spectral transmission spectrum is calculated. In a case where the variation in spectral characteristic is measured, grouping is performed for multiple times of pulsed light irradiation performed on different locations, integration is separately performed, spectral transmission spectra are calculated and then compared.

Abstract: A foil trap that captures debris released from a plasma includes a hub structure, a plurality of foils, and a shield member. The hub structure has a circumferential surface portion and a front surface portion facing the plasma. The foils are arranged radially around the hub structure and are supported by brazing on the circumferential surface portion. The shield member is disposed on the front surface portion, has a circumferential edge portion that shields the circumferential surface portion from the plasma, and forms a thermal resistance section between the shield member and the hub structure.

Abstract: Provided is a new light source device using an excimer lamp, particularly, a light source device for sterilization and deodorization. The light source device includes an excimer lamp and a flyback-type lighting device that supplies power to the excimer lamp. The lighting device includes a transformer, a switching element, and a control circuit that supplies a drive signal to the switching element. The control circuit controls the switching element on and off so that the switching frequency (FS) for the switching element at the time of starting to light is lower than the switching frequency (FO) at the time of steady-state lighting, and the ON-duty (TS) for the switching element at the time of starting to light is lower than the ON-duty (TO) at the time of steady-state lighting.

Abstract: The invention provides a microfluidic device comprising at least one cell culture chamber, the at least one cell culture chamber being connected to at least two openings, the device being configured to supply at least one physiologically active substance from at least one of the openings to the at least one cell culture chamber in such a manner as to form a concentration gradient or concentration gradients in the at least one chamber when cells and a hydrogel are introduced into the at least one cell culture chamber to culture the cells in a 3D-gel medium.