Abstract: Proposed are: a wavelength conversion member having an excellent aesthetic appearance when not irradiated with excitation light and having an excellent luminescence intensity; and a light emitting device using the wavelength conversion member. A wavelength conversion member 10 includes: a first wavelength conversion layer 1 containing a phosphor; and a second wavelength conversion layer 2 formed on a surface of the first wavelength conversion layer 1 and containing phosphor nanoparticles 2a.

Abstract: Provided is a wavelength conversion member that can be adjusted in chromaticity with high accuracy and a production method therefor. A wavelength conversion member 1 having a first principal surface 1a and a second principal surface 1b opposed to each other includes a glass matrix 2 and phosphor particles 3 disposed in the glass matrix 2, wherein concentrations of the phosphor particles 3 in the first principal surface 1a and in the second principal surface 1b are lower than concentrations of the phosphor particles 3 in surface layer bottom planes 1c and 1d located 20 ?m inward from the first principal surface 1a and 20 ?m inward from the second principal surface 1b, respectively.

Abstract: A light introduction device (3) has an inner cavity allowing passage of at least one of a substance introduced into a human body or a substance discharged from the human body. Light is introduced from part of an outer surface of a section, which is arranged outside the human body, of a catheter (2) as a medical conduit having a light-permeable thick portion.

Abstract: Provided is a wavelength conversion member that is less likely to cause deformation or breakage due to thermal expansion and has an excellent light extraction efficiency. A wavelength conversion member 1 that converts a wavelength of excitation light 11 emitted from a light source includes: a container 2 having a frame-shaped sidewall 4; a phosphor layer 6 disposed in the container 2 and containing a resin and a phosphor; a cover member 5 disposed over the sidewall 4 of the container 2 and sealing an interior of the container 2; and a sealing material layer 9 disposed between the sidewall 4 of the container 2 and the cover member 5, wherein the phosphor layer 6 and the cover member 5 are in close contact with each other, and a cavity 10 surrounded by the phosphor layer 6, the cover member 5, and the sealing material layer 9 is provided over the sidewall 4 of the container 2.

Abstract: Provided is a wavelength conversion member that can be adjusted in chromaticity readily and with high accuracy and a production method for the wavelength conversion member. A wavelength conversion member 1 having a first principal surface 1a and a second principal surface 1b opposed to each other includes a glass matrix 2 and phosphor particles 3 disposed in the glass matrix 2, wherein a concentration of the phosphor particles 3 in the first principal surface 1a is higher than a concentration of the phosphor particles 3 in a portion 20 ?m inward from the first principal surface 1a, a concentration of the phosphor particles 3 in the second principal surface 1b is lower than a concentration of the phosphor particles 3 in a portion 20 ?m inward from the second principal surface 1b, and the concentration of the phosphor particles 3 in the first principal surface 1a is higher than the concentration of the phosphor particles 3 in the second principal surface 1b.

Abstract: Provided is a wavelength conversion member that can be adjusted in chromaticity with high accuracy and a production method therefor. A wavelength conversion member 1 having a first principal surface 1a and a second principal surface 1b opposed to each other includes a glass matrix 2 and phosphor particles 3 disposed in the glass matrix 2, wherein concentrations of the phosphor particles 3 in the first principal surface 1a and in the second principal surface 1b are lower than concentrations of the phosphor particles 3 in surface layer bottom planes 1c and 1d located 20 ?m inward from the first principal surface 1a and 20 ?m inward from the second principal surface 1b, respectively.

Abstract: Provided are a method for manufacturing wavelength conversion members that enables manufacturing of wavelength conversion members having a high light extraction efficiency and suppression of material loss, a wavelength conversion member obtained by the method, and a light-emitting device.

Abstract: Provided is a method for manufacturing a wavelength conversion member by which unevenness in luminescent color are less likely to occur. A method for manufacturing a wavelength conversion member includes the steps of: preparing a slurry containing glass particles to be a glass matrix 2 and phosphor particles 3; forming a green sheet by applying the slurry onto a support substrate and moving a doctor blade relative to the slurry, the doctor blade being spaced a predetermined distance away from the support substrate; forming a green sheet laminate by applying heat and pressure to a plurality of the green sheets overlaid one upon another; and sintering the green sheet laminate to obtain a wavelength conversion member, wherein in the step of forming a green sheet laminate, the plurality of green sheets are overlaid one upon another so that, as for at least two of the plurality of green sheets, respective directions of movement of the doctor blade in the step of forming a green sheet intersect each other.

Abstract: A semiconductor light emitting device includes: a light emitting part for emitting ultraviolet light; and a coating part that coats an extraction surface from which the ultraviolet light emitted by the light emitting part is extracted. The coating part includes a resin matrix having a refractive index lower than a refractive index of an inorganic material forming the extraction surface and a hollow part that lowers a refractive index of the coating part as a whole by being dispersed in the resin matrix. The hollow part has an average particle diameter smaller than a peak wavelength of the ultraviolet light emitted by the light emitting part.

Abstract: A semiconductor light emitting device includes: a light emitting part for emitting ultraviolet light; and a coating part that coats a part of an extraction surface from which the ultraviolet light emitted by the light emitting part is extracted. The coating part is comprised of a plurality of isolated parts distanced from each other, and the isolated part is made of a second material having a refractive index that is lower than a refractive index of a first material forming the extraction surface.

Abstract: A fluid sterilization device includes: a flow passage tube in which a processing passage where a passing fluid is sterilized is formed; an inflow passage or an outflow passage formed in the flow passage tube; a light source that irradiates the processing passage with ultraviolet light; and a rotating body provided in the processing passage. The rotating body is rotated around a longitudinal direction of the processing passage in response to a flow of the fluid passing through the processing passage and is configured to come into contact with an inner wall of the flow passage tube during rotation.

Abstract: Provided is a wavelength conversion member that is less likely to cause deformation or breakage due to thermal expansion and has an excellent light extraction efficiency. A wavelength conversion member 1 that converts a wavelength of excitation light 11 emitted from a light source includes: a container 2 having a frame-shaped sidewall 4; a phosphor layer 6 disposed in the container 2 and containing a resin and a phosphor; a cover member 5 disposed over the sidewall 4 of the container 2 and sealing an interior of the container 2; and a sealing material layer 9 disposed between the sidewall 4 of the container 2 and the cover member 5, wherein the phosphor layer 6 and the cover member 5 are in close contact with each other, and a cavity 10 surrounded by the phosphor layer 6, the cover member 5, and the sealing material layer 9 is provided over the sidewall 4 of the container 2.

Abstract: A fluid sterilization apparatus includes: a flow passage for causing a fluid to flow; and a light source that irradiates the fluid flowing in the flow passage with ultraviolet light of a wavelength of 290˜310 nm. The fluid contains a cutting fluid for a cutting work or Japanese sake in the process of manufacturing.

Abstract: Provided are a method for manufacturing a wavelength conversion member that can suppress the reaction between inorganic nanophosphor particles and glass to suppress the deterioration of the inorganic nanophosphor particles, and the wavelength conversion member. The method for manufacturing a wavelength conversion member according to the present invention includes the steps of: forming inorganic protective films 5 on surfaces of inorganic nanophosphor particles 1; and mixing the inorganic nanophosphor particles 1 having the inorganic protective films 5 formed thereon with glass powder and firing a resultant mixture in a temperature range where the inorganic protective films 5 survive.

Abstract: A fluid sterilization apparatus is provided with: a light source that has a semiconductor light-emitting element that emits ultraviolet light; and a flow passage that is formed so as to allow a fluid subject to sterilization to pass through and allow the fluid to be irradiated with ultraviolet light. The flow passage is formed such that the flowing direction of the fluid changes in a plane that faces a light-emitting surface of the semiconductor light-emitting element.

Abstract: A catheter which is one mode of a medical conduit of the present invention is placed inside a human body from the outside of the human body through human tissue. The catheter has a light introducing portion. The light introducing portion is provided on an outer wall surface of the catheter located on the outside-of-human-body side, and allows at least a part of ultraviolet light irradiated from the outside of the catheter to be totally reflected at an inner wall surface of the catheter toward the inside-of-human-body side.

Abstract: A test device is used to test photosensitivity of a skin. The test device is provided with an irradiation unit including a plurality of light irradiation units arranged in a first direction. The plurality of light irradiation units output, in a second direction intersecting the first direction, irradiation light beams that mutually differ at least in one of wavelength characteristics and intensity. The irradiation unit is configured such that intensities of the irradiation light beams output from the plurality of light irradiation units are progressively smaller in the first direction.

Abstract: A sterilization apparatus is provided at a discharge port for supplying a liquid. The sterilization apparatus includes: an annular light guide that has a connection end that is connected to the discharge port and an open end that is on the opposite side of the connection end, and that forms a flow passage communicating with the discharge port; and a light source that allows ultraviolet light to enter the light guide such that the ultraviolet light is transmitted through the light guide while being reflected between an inner circumferential surface and an outer circumferential surface of the light guide. The sterilization apparatus irradiates a liquid that is in contact with the inner circumferential surface of the light guide with the ultraviolet light for sterilization.

Abstract: Provided is a light-emitting device with quantum dots that has a small in-plane variation in luminescence intensity. A light-emitting device (1) includes a light-emitting part (11), a cell (10), a light source (12), and an incident light scatting part. The light-emitting part (11) contains quantum dots. The cell (10) encapsulates the light-emitting part (11). The light source (12) emits light at a wavelength exciting the quantum dots to the light-emitting part (11). The incident light scatting part is disposed between the light source (12) and the light-emitting part (11). The incident light scatting part scatters light incident on the light-emitting part (11).

Abstract: Provided is a wavelength conversion member that can improve the color balance of emitted light.