Abstract: A color conversion element includes: a substrate; a phosphor portion that is disposed above the substrate, receives laser light transmitted from an outside, and emits light in a color different from a color of the laser light; a reflective layer that includes a dielectric multilayer film and is disposed on a principal surface of the phosphor portion facing the substrate; and a joining portion interposed between the reflective layer and the substrate to join the reflective layer and the substrate. The joining portion includes an air layer that exposes the reflective layer in a position where the air layer at least partially overlaps an irradiation region in a plan view, the irradiation region being a region irradiated with the laser light on the phosphor portion.

Abstract: A lighting system includes a plurality of lighting devices and a control device. The plurality of lighting devices are installed in a facility. The control device controls the plurality of lighting devices. The control device controls lighting light projected by at least one lighting device, belonging to the plurality of lighting devices, into colored lighting light, of which a color is different from a color white, to give, upon acquiring information about an event in question, a sign depending on the event in question.

Abstract: A lighting system includes a light source unit and a light-distributing member. The light source unit includes a laser light source. The light-distributing member has the function of reflecting incident light that has been emitted as a beam of light from the light source unit toward a target space. The light-distributing member transforms the incident light into lighting light having a different light distribution property from the incident light and distributes the lighting light over the target space.

Abstract: A light-emitting device includes an optical fiber, a first light source unit, and a second light source unit. The optical fiber includes a wavelength converting portion. The wavelength converting portion is provided between a light incident portion and a light emerging portion. The wavelength converting portion contains a wavelength converting material. The wavelength converting material is excited by excitation light to produce a spontaneous emission of light having a longer wavelength than the excitation light and amplifies the spontaneous emission of light to produce an amplified spontaneous emission of light. The first light source unit makes the excitation light incident on the light incident portion. The second light source unit makes seed light, causing a stimulated emission of light to be produced from the wavelength converting material that has been excited by either the excitation light or the amplified spontaneous emission of light, incident on the light incident portion.

Abstract: A construction component forms at least a part of a structure that faces a target space. The construction component has a first function, a second function, and a third function. The first function is a function of emitting illumination light toward the target space. The second function is a function of allowing incident light to enter the construction component. The incident light is emitted from a light source disposed out of a projection area, viewed from the target space, of the construction component and is incident on the construction component via a light transmission member. The third function is a function of converting the incident light into the illumination light.

Abstract: A light-emitting device includes an optical amplifier and gives off output light from optical amplifier by making a plurality of seed light rays, having mutually different wavelengths, incident on optical amplifier. Optical amplifier includes a medium portion containing a wavelength-converting element. Optical amplifier has wavelength-converting element thereof excited by excitation light to produce a plurality of partially coherent light rays, of which wavelengths are respectively the same as the mutually different wavelengths of plurality of seed light rays, thereby giving off, as output light, a multi-wavelength light beam. Excitation light has a shorter wavelength than any of plurality of seed light rays and is incident on the medium portion. Multi-wavelength light beam includes a plurality of light rays amplified. Plurality of light rays amplified have wavelengths, which are respectively the same as mutually different wavelengths of plurality of seed light rays.

Abstract: A construction component forms at least a part of a structure that faces a target space. The construction component has a first function, a second function, and a third function. The first function is a function of emitting illumination light toward the target space. The second function is a function of allowing incident light to enter the construction component. The incident light is emitted from a light source disposed out of a projection area, viewed from the target space, of the construction component and is incident on the construction component via a light transmission member. The third function is a function of converting the incident light into the illumination light.

Abstract: A light-emitting device includes an optical fiber, a first light source unit, and a second light source unit. The optical fiber includes a wavelength converting portion. The wavelength converting portion is provided between a light incident portion and a light emerging portion. The wavelength converting portion contains a wavelength converting material. The wavelength converting material is excited by excitation light to produce a spontaneous emission of light having a longer wavelength than the excitation light and amplifies the spontaneous emission of light to produce an amplified spontaneous emission of light. The first light source unit makes the excitation light incident on the light incident portion. The second light source unit makes seed light, causing a stimulated emission of light to be produced from the wavelength converting material that has been excited by either the excitation light or the amplified spontaneous emission of light, incident on the light incident portion.

Abstract: The conductive device includes a substrate and an electrically conductive portion. The electrically conductive portion is provided on the substrate. The electrically conductive portion includes an electrically conductive part and a low resistance conductive layer. The electrically conductive part is provided on the substrate and includes an electrically conductive particle and an organic binder. The low resistance conductive layer covers at least part of a surface of the electrically conductive part and has lower resistivity than the electrically conductive part.

Abstract: A color conversion element includes: a substrate; a phosphor portion that is disposed above the substrate, receives laser light transmitted from an outside, and emits light in a color different from a color of the laser light; a reflective layer that includes a dielectric multilayer film and is disposed on a principal surface of the phosphor portion facing the substrate; and a joining portion interposed between the reflective layer and the substrate to join the reflective layer and the substrate. The joining portion includes an air layer that exposes the reflective layer in a position where the air layer at least partially overlaps an irradiation region in a plan view, the irradiation region being a region irradiated with the laser light on the phosphor portion.

Abstract: A color conversion element includes: a phosphor layer that includes at least one type of phosphor; a reflecting layer stacked on the phosphor layer; a substrate disposed in a position opposite to the reflecting layer; a joining portion interposed between the reflecting layer and the substrate for joining the reflecting layer and the substrate; and an absorbing portion disposed above a principal surface of the substrate closer to the joining portion. The absorbing portion is covered with the joining portion and absorbs laser light having a wavelength that excites the phosphor.

Abstract: A light-emitting element includes: a phosphor layer including phosphor (phosphor particles) of at least one type; a substrate which has a thermal conductivity higher than a thermal conductivity of the phosphor layer, the substrate having a principal surface above which the phosphor layer is disposed; and a joining part which is interposed between the phosphor layer and the substrate to join the phosphor layer and the substrate together with metal. An adhesion layer and a reflecting layer are interposed between the joining part and the phosphor layer, the adhesion layer being light-transmissive and on a principal surface of the phosphor layer which faces the substrate, the reflecting layer being on a principal surface of the adhesion layer which faces the substrate.

Abstract: Light emitting device includes structure protruding from a side of a surface of second conductive semiconductor layer of LED chip toward a side of a surface of second conductor portion of mounting substrate to contact the surface of second conductor portion, and is positioned to extend around an outer periphery of second electrode. First electrode and a first conductor portion are joined to each other by first joint portion, and second joint portion joining second electrode and second conductor portion to each other fills a space surrounded by second electrode, protruding structure, and second conductor portion. Protruding structure is disposed to extend around the outer periphery of second electrode to surround second joint portion in planar view. A part of mounting substrate overlapping protruding structure in planar view is either identical in height to or lower than a part of second conductor portion joined to second joint portion.

Abstract: A color conversion element includes: a substrate, a phosphor layer disposed above one principal surface of the substrate, and a joining portion interposed between the substrate and the phosphor layer for joining the substrate and the phosphor layer using metal. The phosphor layer includes individual pieces that are sheet-shaped and planarly arranged. The individual pieces each include at least one type of phosphor. Also, the joining portion has a porous structure obtained by sintering metal nanoparticles.

Abstract: A color conversion element includes: a phosphor layer that includes at least one type of phosphor; a reflecting layer stacked on the phosphor layer; a substrate disposed in a position opposite to the reflecting layer; a joining portion interposed between the reflecting layer and the substrate for joining the reflecting layer and the substrate; and an absorbing portion disposed above a principal surface of the substrate closer to the joining portion. The absorbing portion is covered with the joining portion and absorbs laser light having a wavelength that excites the phosphor.

Abstract: An infrared sensor includes an infrared detecting device, a lens, a member, a gap and a spacer. The lens is disposed above the infrared detecting device. The member forms an external surface and includes a first opening having a maximum internal diameter. The gap is disposed between the member and the lens. The spacer is disposed between the member and the lens so as to form the gap, and that is directly contact with lens. The spacer has a circular inner periphery, in planar view, which has a larger internal diameter than the maximum internal diameter of the first opening of the member.

Abstract: Light emitting device includes structure protruding from a side of a surface of second conductive semiconductor layer of LED chip toward a side of a surface of second conductor portion of mounting substrate to contact the surface of second conductor portion, and is positioned to extend around an outer periphery of second electrode. First electrode and a first conductor portion are joined to each other by first joint portion, and second joint portion joining second electrode and second conductor portion to each other fills a space surrounded by second electrode, protruding structure, and second conductor portion. Protruding structure is disposed to extend around the outer periphery of second electrode to surround second joint portion in planar view. A part of mounting substrate overlapping protruding structure in planar view is either identical in height to or lower than a part of second conductor portion joined to second joint portion.

Abstract: An interposer includes element mounting sections and terminal sections directly and partly formed on a surface of an aluminum film having the predetermined pattern. Each of the element mounting sections and the terminal sections has a laminated structure of an Ni film, an Pd film and an Au film. The interposer is formed with an AuSn layer on a predetermined region of a surface of each Au film in the element mounting sections. The interposer includes a protective film having optical permeability that directly covers a region of the surface of the aluminum film, which is out of contact with the element mounting sections and the terminal sections.

Abstract: An interposer includes element mounting sections and terminal sections directly and partly formed on a surface of an aluminum film having the predetermined pattern. Each of the element mounting sections and the terminal sections has a laminated structure of an Ni film, an Pd film and an Au film. The interposer is formed with an AuSn layer on a predetermined region of a surface of each Au film in the element mounting sections. The interposer includes a protective film having optical permeability that directly covers a region of the surface of the aluminum film, which is out of contact with the element mounting sections and the terminal sections.

Abstract: Light emitting device includes structure protruding from a side of a surface of second conductive semiconductor layer of LED chip toward a side of a surface of second conductor portion of mounting substrate to contact the surface of second conductor portion, and is positioned to extend around an outer periphery of second electrode. First electrode and a first conductor portion are joined to each other by first joint portion, and second joint portion joining second electrode and second conductor portion to each other fills a space surrounded by second electrode, protruding structure, and second conductor portion. Protruding structure is disposed to extend around the outer periphery of second electrode to surround second joint portion in planar view. A part of mounting substrate overlapping protruding structure in planar view is either identical in height to or lower than a part of second conductor portion joined to second joint portion.