Abstract: A liquid sterilization device includes: an outer tube through which a fluid to be sterilized flows from one end side to the other end side in the axial direction; a flow-regulating plate that has a plurality of tapered holes having diameters thereof increasing from one end side toward the other end side in the axial direction; and a light source that applies ultraviolet light to a sterilization space on the other end side relative to the flow-regulating plate.

Abstract: A light emitting device includes a semiconductor light emitting element which emits excitation light having a peak wavelength in a range of 440 to 450 nm and a fluorescent body layer which is provided on the semiconductor light emitting element, is excited by the excitation light from the semiconductor light emitting element, and contains a first fluorescent body and a second fluorescent body which emit first fluorescent light and second fluorescent light. The first fluorescent light has a peak wavelength in a range of 540 to 575 nm, and the second fluorescent light has a peak wavelength in a range of 590 to 605 nm. In mixed color light of the radiation light, the intensity of the radiation light of the semiconductor light emitting element is 1/10 to 1/60 of the intensity of the combined light of the radiation light from the first fluorescent body and the second fluorescent body.

Abstract: A fluid sterilizing apparatus includes: a cylindrical inner pipe which has cutouts penetrating in a radial direction and an outlet pipe projecting in the radial direction; an outer pipe which has, between itself and the inner pipe, an annular space in communication with the cutouts and which houses the inner pipe; an inflow pipe which allows a fluid to flow into the outer pipe; an outflow pipe which is provided coaxially with the inflow pipe and which is connected with the outlet pipe to allow the fluid having passed through the annular space to flow out; and a light source which irradiates the fluid passing through the interior of the inner pipe with ultraviolet light via an ultraviolet light transmitting window.

Abstract: To provide a light source module device capable of controlling the light distribution of ultraviolet light with a small and simple structure. A light source module device 7 includes a substrate 4, a light source 3 mounted on the substrate 4 and emitting ultraviolet light, a reflector 8 mounted on the substrate 4 so as to surround the light source 3 and reflecting the ultraviolet light by its inner surface to guide the ultraviolet light toward an irradiation target, and a cap-like optical member 9 mounted so as to cover the outer circumference of the reflector 8 and condensing or diffusing the ultraviolet light.

Abstract: A fluid sterilization device includes a cylindrical body of a housing having a flow passage through which fluid flows in an axial direction, an inflow port through which the fluid flows into the cylindrical body, an outflow port on the outer circumference of the cylindrical body, a light source provided on an end section on an opposite side to the inflow port, and a quartz cap including a cylindrical section and a leading end section. The quartz cap transmits, collects, or scatters ultraviolet light. The cylindrical section of the quartz cap is fitted to an inner wall of the cylindrical body, and a boundary section of the quartz cap is disposed a position coinciding with an end surface of the outflow port on a side close to the first light source or at a position where the boundary section protrudes beyond the end surface.

Abstract: A light emitting device includes a semiconductor light emitting element which emits excitation light having a peak wavelength in a range of 440 to 450 nm and a fluorescent body layer which is provided on the semiconductor light emitting element, is excited by the excitation light from the semiconductor light emitting element, and contains a first fluorescent body and a second fluorescent body which emit first fluorescent light and second fluorescent light. The first fluorescent light has a peak wavelength in a range of 540 to 575 nm, and the second fluorescent light has a peak wavelength in a range of 590 to 605 nm. In mixed color light of the radiation light, the intensity of the radiation light of the semiconductor light emitting element is 1/10 to 1/60 of the intensity of the combined light of the radiation light from the first fluorescent body and the second fluorescent body.

Abstract: To provide a light source module device capable of controlling the light distribution of ultraviolet light with a small and simple structure. A light source module device 7 includes a substrate 4, a light source 3 mounted on the substrate 4 and emitting ultraviolet light, a reflector 8 mounted on the substrate 4 so as to surround the light source 3 and reflecting the ultraviolet light by its inner surface to guide the ultraviolet light toward an irradiation target, and a cap-like optical member 9 mounted so as to cover the outer circumference of the reflector 8 and condensing or diffusing the ultraviolet light.

Abstract: A semiconductor light emitting apparatus includes a semiconductor light emitting element having a first electrode and a second electrode; a substrate having first and second wiring pattern layers electrically-connected to the first and second electrodes, respectively, and multiple conductive bonding layer elements provided between the first electrode and the first wiring pattern layer and/or between the second electrode and the second wiring pattern layer.

Abstract: A reflection type optical sensor can include a light emitting and receiving unit. The light emitting and receiving unit can include both a light emitting unit and a light receiving unit having light receiving sensitivity to light emitted from the light emitting unit. The light emitting unit and the light receiving unit can be arranged such that the optical axis of the light emitting unit intersects at a predetermined angle with the optical axis of the light receiving unit. The light emitting and receiving unit can be movably supported.

Abstract: A reflection type optical sensor can include a light emitting and receiving unit. The light emitting and receiving unit can include both a light emitting unit and a light receiving unit having light receiving sensitivity to light emitted from the light emitting unit. The light emitting unit and the light receiving unit can be arranged such that the optical axis of the light emitting unit intersects at a predetermined angle with the optical axis of the light receiving unit. The light emitting and receiving unit can be movably supported.