Abstract: A light emitting device includes: a substrate (40); blue light emitting elements (10) arranged on the main surface of the substrate (40); and a phosphor sheet (30) containing a phosphor that is excited by emission light from the blue light emitting elements and emits excitation light, the phosphor sheet (30) being disposed above the blue light emitting elements (30), wherein the blue light emitting elements (10) includes first blue light emitting elements (11) which emit first emission light having a first wavelength taken as a peak wavelength of a light emission spectrum, and second blue light emitting elements (12) which emit second emission light having a second wavelength taken as a peak wavelength of a light emission spectrum, and the second wavelength being a longer wavelength than the first wavelength by a wavelength difference of at least 10 nm.

Abstract: A light emitting device includes: a substrate (40); blue light emitting elements (10) arranged on the main surface of the substrate (40); and a phosphor sheet (30) containing a phosphor that is excited by emission light from the blue light emitting elements and emits excitation light, the phosphor sheet (30) being disposed above the blue light emitting elements (30), wherein the blue light emitting elements (10) includes first blue light emitting elements (11) which emit first emission light having a first wavelength taken as a peak wavelength of a light emission spectrum, and second blue light emitting elements (12) which emit second emission light having a second wavelength taken as a peak wavelength of a light emission spectrum, and the second wavelength being a longer wavelength than the first wavelength by a wavelength difference of at least 10 nm.

Abstract: A device for machining the flange part of a wheel arch, wherein a machining mechanism includes, as general-purpose drive parts, first to third cylinders, and the work bending mold for bending the flange part of the wheel arch, work receiving mold, and work guide of the machining mechanism are replaceable with those of the other types. When a dedicated mold is replaced according to the shape of a work, the entire part of the machining mechanism must not be replaced, but merely the work bending mold, work receiving mold and work guide may be replaced with those of the other types.

Abstract: A device for machining the flange part of a wheel arch, wherein a machining mechanism includes, as general-purpose drive parts, first to third cylinders, and the work bending mold for bending the flange part of the wheel arch, work receiving mold, and work guide of the machining mechanism are replaceable with those of the other types. When a dedicated mold is replaced according to the shape of a work, the entire part of the machining mechanism must not be replaced, but merely the work bending mold, work receiving mold and work guide may be replaced with those of the other types.

Abstract: A light-emitting element is mounted in a cup-like portion formed on a substrate and a case. The cup-like portion is filled with a sealing member made of a light-transmissible resin. A layer made of a material having a refractive index lower than that of the sealing member is provided between the sealing member and a surface of the case.

Abstract: After a light-emitting element exhibiting an emission peak wavelength in a wavelength range of not longer than 500 nm is mounted into a cup-like portion of a base member, the cup-like portion is filled with epoxy group-containing silicone rubber. An aromatic polyamide-based resin is used as a reflector material.

Abstract: After a light-emitting element exhibiting an emission peak wavelength in a wavelength range of not longer than 500 nm is mounted into a cup-like portion of a base member, the cup-like portion is filled with epoxy group-containing silicone rubber. An aromatic polyamide-based resin is used as a reflector material.

Abstract: A light-emitting element is mounted in a cup-like portion formed on a substrate and a case. The cup-like portion is filled with a sealing member made of a light-transmissible resin. A layer made of a material having a refractive index lower than that of the sealing member is provided between the sealing member and a surface of the case.

Abstract: A method for introducing a prestress into a concrete member includes the steps of passing a steel rod (2) through a hollow steel rod (1), applying a tensile force to the hollow steel rod (1), while using the steel rod (2) as a reaction support member, placing concrete (4) around the hollow prestressed steel rod (1), and hardening the concrete (4). The apparatus includes a flat bearing support plate that abuts the concrete to be prestressed, a jack and ram, a rigid support member for interconnecting the jack and ram to the bearing support plate, and a holding cylinder positioned between the bearing support plate and the jack and ram. The bearing support plate and a leading end of the holding cylinder are apertured and screw threadedly receive the threaded trailing end of a hollow steel rod. The trailing end of the steel rod is screw threadedly received by the trailing end of the holding cylinder.