Abstract: A multi-beam semiconductor laser device includes an edge-emitting first semiconductor laser chip and an edge-emitting second semiconductor laser chip. The first semiconductor laser chip and the second semiconductor laser chip are located adjacently to each other in a first direction. The first and second semiconductor laser chips each include a semiconductor substrate and a stacked growth layer including a first conductive cladding layer, a light-emitting layer, and a second conductive cladding layer formed on the semiconductor substrate. The first and second semiconductor laser chips include m (m?1) and n (n?1) laser resonators extending in a second direction orthogonal to the first direction, respectively. The m laser resonators of the first semiconductor laser chip are disposed at a position closer to a side where the second semiconductor laser chip is located adjacently than a side where the second semiconductor laser chip is not located adjacently.

Abstract: A light source apparatus generates wavelength scanning light. A pulsed light source generates pulsed light including a continuous spectrum. An optical divider spatially divides the broadband pulsed light L into a plurality of n (n?2) beams according to wavelengths. A plurality of n fibers give different delays to the n beams. The coupler multiplexes n beams output from the n fibers. In the light source apparatus, at least a part from an incident end of the optical divider to emission ends of the n fibers has a continuous waveguide structure. A light monitoring device extracts and measures part of light propagating through the continuous waveguide structure.

Abstract: Provided are an infrared LED element with an emission wavelength of 1000 nm or more, which has improved emission efficiency by enhancing uniformity of light emission in a surface direction. The infrared LED element includes: a support substrate; a reflection layer formed on top of the support substrate; an insulating layer formed on top of the reflection layer; a contact layer formed on top of the insulating layer, the contact layer being made of GaxIn1-xAsyP1-y (0?x<0.33, 0?y<0.

Abstract: A liquid analysis device (HPLC device) includes a main flow path provided with a first buffer portion, a first switch valve, an HPLC column, a second switch valve, and a second buffer portion; and a bypass flow path that bypasses the HPLC column. A controller, by controlling a pump, the first switch valve, and the second switch valve, switches between a first path that allows at least a portion of a fluid held in the first buffer portion to flow into the second buffer portion through the main flow path and a second path that allows a fluid held in the second buffer portion to flow into the first buffer portion through the bypass flow path spanning between the first switch valve and the second switch valve in the main flow path.

Abstract: A light source apparatus, in which an energy beam transforms a liquid raw material into plasma to extract radiation, includes a rotation body, a raw material supply section, and an electric field applying section. The rotation body is disposed at a position onto which the energy beam is incident. The raw material supply section supplies the liquid raw material to the rotation body. The electric field applying section is set to a potential different from a potential of the liquid raw material that has been supplied to the rotation body, and applies an electric field to a plasma generation area in which plasma is to be generated by irradiation of the energy beam.

Abstract: An ultraviolet irradiation device includes a light source that emits light showing light intensity in a first wavelength band of 200 nm to 235 nm and a second wavelength band of 240 nm to 280 nm; an optical filter that suppresses the light intensity in the second wavelength band and has transmittance characteristics according to an incident angle of the light emitted from the light source. A first/second angular distribution of light is obtained from a spectrum for each light distribution angle of the light emitted from the optical filter. The first angular distribution of light has a first angle of a light beam showing maximum intensity, the first angle substantially matching with a second angle of a light beam showing maximum intensity in the second angular distribution of light.

Abstract: A light source apparatus, in which an energy beam transforms a liquid raw material into plasma to extract radiation, includes a rotation body, a raw material supply section, and a layer thickness adjustment section. The rotation body is disposed at a position onto which the energy beam is incident, and includes a groove overlapping with an incident area of the energy beam. The raw material supply section supplies the groove with the liquid raw material. The layer thickness adjustment section adjusts a layer thickness of the liquid raw material such that a front surface of the liquid raw material forms a concave surface in response to the groove in the incident area of the energy beam.

Abstract: A light source apparatus includes a beam introduction section, a plate member, a raw material supply section, and a radiation extraction section. The beam introduction section introduces an energy beam. The plate member has a front surface and a back surface, is disposed at a location where the introduced energy beam is incident onto the front surface, and is rotatable around a direction orthogonal to the front surface as its rotation axis direction. The raw material supply section supplies plasma raw material to an incident area in the front surface to generate plasma. The radiation extraction section extracts and emits radiation from the generated plasma. The plate member is disposed such that the normal axis of the incident area in the front surface is off from a between-axes area configured between an incident axis of the energy beam incident onto the incident area and an emission axis of the radiation.

Abstract: The pulse width of light from a pulsed light source 1 is stretched by a stretching element 2 such that an elapsed time and the wavelength of the light in the pulsed light correspond to each other on a one-to-one basis, and the stretched light radiates to an object S. The output of a light receiver 4 that has received light from the object S is digitized by an AD converter 6 and the digitized signal is supplied to a calculation means 5. A trigger signal generated by a trigger signal generator 7 in response to the rise of the pulsed light is delayed by a trigger delay section 74 and supplied to the AD converter 6 after the completion of a dead time T3.

Abstract: To improve startability in a UV irradiation apparatus equipped with excimer lamps. The UV irradiation apparatus includes a plurality of excimer lamps each having a light-emitting tube filled with a discharge gas containing a noble gas. The plurality of excimer lamps includes a first excimer lamp filled with the discharge gas at a first enclosed gas pressure and a second excimer lamp filled with the discharge gas at a second enclosed gas pressure lower than the first enclosed gas pressure. The first excimer lamp is placed in a position such that at least part of light emitted from the second excimer lamp is allowed to enter the first excimer lamp.

Abstract: An inactivation device, in a space inside a mobility means that transports a person or an object, that inactivates microorganisms and/or viruses present in the space where a person is present by irradiating the space with ultraviolet light, the inactivation device includes: an ultraviolet light irradiation unit including an ultraviolet light source emitting light including ultraviolet light having a wavelength that inactivates microorganisms and/or viruses; and a controller that controls the irradiation of the light emitted from the ultraviolet light source. The ultraviolet light source is either an excimer lamp or an LED, and the ultraviolet light included in the light emitted from the ultraviolet light source includes ultraviolet light having a wavelength range from 200 nm to 240 nm. The ultraviolet light irradiation unit is fixed to the mobility means.

Abstract: An inactivation device inactivates microorganisms and/or viruses present in a space where a person is present by irradiating the space with ultraviolet light. The inactivation device includes a mobile body movable in the space, a drive section that drives the mobile body, an ultraviolet light irradiation unit provided with an ultraviolet light source emitting light including ultraviolet light having a wavelength that inactivates microorganisms and/or viruses, and a controller that controls the irradiation of the light from the ultraviolet light source. The ultraviolet light source is either an excimer lamp or an LED, and the ultraviolet light included in the light emitted from the ultraviolet light source includes ultraviolet light having a wavelength range from 200 nm to 240 nm. The ultraviolet light irradiation unit is fixed to the mobile body.

Abstract: An inactivating device includes: an ultraviolet light source to emit ultraviolet light, a main light-emission wavelength band of the ultraviolet light being at least partly included in a range from 200 nm to 230 nm inclusive; and an optical filter including a multilayer dielectric film, wherein with respect to the ultraviolet light incident at an incidence angle of 0 degrees, the optical filter has a band in which the ultraviolet light in a range of wavelengths from 190 nm to 235 nm inclusive is transmitted, and a wavelength ?5 at which transmittance of the optical filter indicates 5% is longer than or equal to 236 nm and shorter than 245 nm.

Abstract: An ultraviolet light irradiation device includes an optical filter. The optical filter has a transmission spectrum of zero-degree light including a first transmission band and a second transmission band that transmit the zero-degree light and a first restriction band that restricts transmission of the zero-degree light. The first transmission band is present within the wavelength band of 200 nm or more and less than 240 nm. The second transmission band is present within a wavelength band of more than 300 nm and less than 400 nm. The first restriction band is present over an entire wavelength range of at least 240 nm or more and 300 nm or less, and the first restriction band has an upper limit provided within a range of more than 300 nm and 380 nm or less.

Abstract: Providing an inactivating apparatus for inactivating pathogens using ultraviolet light which has improved convenience of use. The inactivating apparatus including: a light irradiation device having a light source that emits ultraviolet light for inactivating pathogens; a fixing base to/from which a main body of the light irradiation device is attachable/detachable; and a controller that switches control of lighting state of the light irradiation device between when the main body is attached to the fixing base and when the main body is detached from the fixing base.

Abstract: An inactivation device for bacteria and/or viruses includes: an ultraviolet light source emitting ultraviolet light having a main emission wavelength belonging to within a wavelength range from 190 nm or more to less than 240 nm; an enclosure including a light-extraction surface that is constituted by an opening or a window member, and housing the ultraviolet light source thereinside; and a reflective member on which the ultraviolet light that has passed through the light-extraction surface is incident and changes a traveling direction of the ultraviolet light. The reflective member has a reflective surface that makes an optical axis of the ultraviolet light that has been incident change to a direction directly away from the enclosure, or to a direction away from the enclosure after traveling toward a center area of the enclosure, with respect to a first direction parallel to the light-extraction surface.

Abstract: A semiconductor laser device includes a laser resonator including a layered structure in which a lower cladding layer, an active layer, and an upper cladding layer are formed over a semiconductor substrate, and a ridge that is formed on the upper cladding layer. The laser resonator emits laser light having a beam profile. When viewed in plan from a direction orthogonal to the semiconductor substrate, the laser resonator has an emission area on its emission end face. When the emission end face of the laser resonator is viewed in front, a virtual line defined by the intensity being 1/e2 of the peak intensity of the beam profile of the laser light fits inside the upper cladding layer in the emission area.

Abstract: The disclosure is to provide a practical structure of a pulse spectrometer that transmits pulsed light by dividing it through a plurality of fibers for pulse stretching, and makes the divided light beams overlap in a same region on an irradiation surface. A broadband pulsed light from a pulse light source is divided according to wavelength by an arrayed waveguide grating used as a dividing element, the pulse is then correlated one-to-one between time and wavelength while being transmitted through a bundle fiber, and then emitted through an irradiation unit onto an object. The individual light beams output from the individual cores of the bundle fiber are overlapped by a first lens in a substantially same region on a first plane perpendicular to an optical axis, and an image in the first region is projected by second lenses so as to be emitted on the object.

Abstract: Provided are an inactivation method and an inactivation system designed to produce a desired inactivating effect with increased reliability using ultraviolet light that has an extremely small influence on the human body. A method for inactivating bacteria or viruses in a space defined includes a step of irradiating of an inner wall surface, a floor surface in the space or a surface of an object disposed in the space where a specified substance displaying at least one of antibacterial and antiviral characteristics is present with ultraviolet light having a wavelength within a range of 190 nm or more and less than 240 nm.

Abstract: Provided is an ultraviolet light irradiation device that is capable of causing effective inactivation of microorganisms as well as a method of using the ultraviolet light irradiation device. An ultraviolet light irradiation device includes a light source that radiates ultraviolet light with a wavelength in a range of 190 nm to 235 nm; a housing that houses the light source; an extracting portion that extracts the ultraviolet light that is radiated from the light source and causes it to be directed toward an exterior of the housing; and a diffusing member that diffuses the ultraviolet light.