Abstract: An optical connector includes: a ferrule; a housing that houses a floating mechanism that retractably presses the ferrule; a coupling attached to an outside of the housing; and a boot attached to a rear side of a spring push of the floating mechanism. The spring push includes: a tube part; a flange section formed on an outer circumference of the tube part; a groove part formed closer to a front side of the tube part than the flange section; and a projection that protrudes outward from a portion of an outer surface of the groove part. The boot includes: a claw part that is formed on a front edge of a front opening of the boot and that hooks onto the groove part; and a recess that is formed in the front edge of the front opening of the boot and that engages with the projection.

Abstract: An optical connector includes: a ferrule that holds a tip of an optical fiber; a housing that houses the ferrule; a coupling that releases a latched state of the optical connector by moving to a rear side of the optical connector with respect to the housing; and a tab member that includes an operation section disposed farther toward the rear side of the optical connector than the coupling, and that causes the coupling to move to the rear side of the optical connector with respect to the housing when the operation section is pulled. The tab member is latched from the inside of the coupling.

Abstract: The present invention has an object of providing: a wavelength conversion member and a wavelength conversion element which are capable of reducing the decrease in luminescence intensity with time and the melting of component materials when irradiated with high-power LED or LD light; manufacturing methods of the wavelength conversion member and the wavelength conversion element; and a light-emitting device. A wavelength conversion member 10 containing a matrix 1 and phosphor particles 2 dispersed in the matrix 1, the matrix 1 comprising: a skeleton made of an inorganic material 3; and a transparent material 4 filled in a hole formed by the skeleton, the inorganic material 3 having a higher thermal conductivity than the transparent material 4.

Abstract: An optical connector includes: a ferrule including a guide pin hole, a plurality of fiber holes lined up in a width direction of the optical fiber, and an inclined end face; a housing in which the ferrule is retractably housed; and an application part that applies an upward force to the ferrule in an upward/downward direction when the optical connector connects with a counterpart connector in a connecting/disconnecting direction. The upward/downward direction is a height direction of the optical connector and is orthogonal to both the connecting/disconnecting direction and the width direction. The inclined end face projects upward toward the counterpart connector.

Abstract: An optical connector includes: a housing that retractably accommodates a ferrule; a spring that is accommodated in the housing to press the ferrule to a front side; and an engaging member connected to one end of the spring, fixed to the housing by engaging with the housing, and including a pair of arm parts arranged to sandwich the spring. When a direction perpendicular to a direction in which the spring presses the ferrule and to a direction in which the pair of arm parts is lined up is an up-down direction, window parts are arranged on both sides in the up-down direction of the housing. The engaging member includes: claw parts that are provided on an upper and a lower side of the pair of arm parts to engage with the window parts; and deformation parts that allow the claw parts to be displaced in the up-down direction.

Abstract: Provided are nanophosphor-attached inorganic particles that can suppress the degradation of the nanophosphor when sealed in glass, and a wavelength conversion member using the nanophosphor-attached inorganic particles. The nanophosphor-attached inorganic particle 10 include: inorganic particles 1 having an average particle diameter of 1 ?m or more; and a nanophosphor 2 attached to surfaces of the inorganic particles 1.

Abstract: Provided is a wavelength conversion member that can increase the light extraction efficiency to improve the luminous efficiency. A wavelength conversion member 10 includes: a phosphor layer 1 containing a glass matrix and inorganic phosphor powder dispersed in the glass matrix; a glass layer 2 disposed on a surface of the phosphor layer 1 and having a refractive index equal to or smaller than a refractive index of the inorganic phosphor powder; and a microscopically uneven layer 3 disposed on a surface of the glass layer 2 and having a refractive index equal to or smaller than the refractive index of the glass layer 2.

Abstract: Provided is a wavelength conversion member that can increase the light extraction efficiency to improve the luminous efficiency. A wavelength conversion member 10 includes: a phosphor layer 1 containing a glass matrix and inorganic phosphor powder dispersed in the glass matrix; a glass layer 2 disposed on a surface of the phosphor layer 1 and having a refractive index equal to or smaller than a refractive index of the inorganic phosphor powder; and a microscopically uneven layer 3 disposed on a surface of the glass layer 2 and having a refractive index equal to or smaller than the refractive index of the glass layer 2.

Abstract: Provided is a luminescent wheel for a projector, which has a novel structure in which a phosphor layer is hard to break even if its thickness is reduced; a manufacturing method therefor; and a light emitting device for a projector. A luminescent wheel for a projector includes: a phosphor layer (11) which has a first principal surface (11a) and a second principal surface (11b) located on an opposite side to the first principal surface (11a) and is capable of being excited by the entry of excitation light to emit fluorescence; a first glass layer (12) provided on the first principal surface (11a) of the phosphor layer (11); and a second glass layer (13) provided on the second principal surface (11b) of the phosphor layer (11).

Abstract: Provided is a luminescent wheel for a projector, which has a novel structure in which a phosphor layer is hard to break even if its thickness is reduced; a manufacturing method therefor; and a light emitting device for a projector. A luminescent wheel for a projector includes: a phosphor layer (11) which has a first principal surface (11a) and a second principal surface (11b) located on an opposite side to the first principal surface (11a) and is capable of being excited by the entry of excitation light to emit fluorescence; a first glass layer (12) provided on the first principal surface (11a) of the phosphor layer (11); and a second glass layer (13) provided on the second principal surface (11b) of the phosphor layer (11).

Abstract: Provided is a luminescent wheel for a projector, which has a novel structure in which a phosphor layer is hard to break even if its thickness is reduced; a manufacturing method therefor; and a light emitting device for a projector. A luminescent wheel for a projector includes: a phosphor layer (11) which has a first principal surface (11a) and a second principal surface (11b) located on an opposite side to the first principal surface (11a) and is capable of being excited by the entry of excitation light to emit fluorescence; a first glass layer (12) provided on the first principal surface (11a) of the phosphor layer (11); and a second glass layer (13) provided on the second principal surface (11b) of the phosphor layer (11).

Abstract: Provided is a resin composition for three-dimensional modeling to which inorganic filler particles of a sufficient amount can be added, without damaging transparency. The resin composition for three-dimensional modeling includes a curable resin and inorganic filler particles, in which the inorganic filler particles are light-transmitting particles of which a difference in refractive index nd to the curable resin after curing is ±0.02 or less, and a difference in Abbe number vd to the curable resin after curing is ±10 or less.

Abstract: Provided is a wavelength conversion member that can exhibit an antireflection function for incident light and emitted light at various angles and can increase the luminous efficiency. A wavelength conversion member 10 includes: a phosphor layer 1 containing a glass matrix 3 and phosphor particles 4 dispersed in the glass matrix 3; and a low-refractive index layer 2 formed on a surface of the phosphor layer 1 and having a refractive index equal to or smaller than a refractive index of the phosphor particles 4, wherein the low-refractive index layer 2 has an uneven surface structure and a waviness profile formed by the uneven surface structure has a root-mean-square gradient W?q of 0.1 to 1.

Abstract: Provided are a wavelength conversion member and a wavelength conversion element which are capable of reducing the decrease in luminescence intensity with time and the melting of a component material when irradiated with light of a high-power LED or LD, and a light emitting apparatus using the wavelength conversion member or the wavelength conversion element. A wavelength conversion member contains, in % by mass, 70 to 99.9% inorganic phosphor particles and 0.1 to 30% easily sinterable ceramic particles, wherein the easily sinterable ceramic particles are interposed between the inorganic phosphor particles and the inorganic phosphor particles are bound together by the easily sinterable ceramic particles.

Abstract: Provided are a wavelength conversion member and a wavelength conversion element which are capable of reducing the decrease in luminescence intensity with time and the melting of a component material when irradiated with light of a high-power LED or LD, and a light emitting apparatus using the wavelength conversion member or the wavelength conversion element. A wavelength conversion member contains, in % by mass, 70 to 99.9% inorganic phosphor particles and 0.1 to 30% easily sinterable ceramic particles, wherein the easily sinterable ceramic particles are interposed between the inorganic phosphor particles and the inorganic phosphor particles are bound together by the easily sinterable ceramic particles.

Abstract: Provided is a wavelength conversion member capable of reducing the decrease in luminescence intensity with time and the melting of a component material when irradiated with light of a high-power LED or LD and providing a light emitting device using the wavelength conversion member. The wavelength conversion member (11) includes a laminate that includes: a phosphor layer (1); and light-transmissive heat dissipation layers (2) formed on both surfaces of the phosphor layer (1) and having a higher thermal conductivity than the phosphor layer (1).

Abstract: Provided is a wavelength conversion member that can reduce strain under stress occurring at the interface between a substrate and a phosphor layer and is therefore less susceptible to breakage during use. The wavelength conversion member 1 comprises a substrate 10 and a phosphor layer 20 bonded on the substrate 10, the phosphor layer 20 including inorganic phosphor powder 22 dispersed in a glass matrix 21. In a temperature range of 30° C. to a setting point of the phosphor layer 20, a relation ?10×10?7?(?1??2)?10×10?7 (/° C.) is satisfied where ?1 represents a coefficient of thermal expansion of the substrate 10 and ?2 represents a coefficient of thermal expansion of the phosphor layer 20. The setting point is defined by Tf?(Tf?Tg)/3 (where Tg represents a glass transition point and Tf represents a deformation point).

Abstract: Provided is a resin composition for three-dimensional modeling to which inorganic filler particles of a sufficient amount can be added, without damaging transparency. The resin composition for three-dimensional modeling includes a curable resin and inorganic filler particles, in which the inorganic filler particles are light-transmitting particles of which a difference in refractive index nd to the curable resin after curing is ±0.02 or less, and a difference in Abbe number vd to the curable resin after curing is ±10 or less.

Abstract: Provided is a fluorescent wheel for a projector capable of suppressing the heating of the phosphor layer and a light emitting device for a projector using the same. The fluorescent wheel for a projector includes: a phosphor layer (12); an annular ceramic substrate (11) which includes a first principal surface provided with the phosphor layer (12) and a second principal surface located on an opposite side to the first principal surface and has a higher thermal conductivity than the phosphor layer (12); and a reflective layer (13) provided on the second principal surface of the ceramic substrate (11).

Abstract: Provided is a wavelength conversion member capable of reducing the decrease in luminescence intensity with time and the melting of a component material when irradiated with light of a high-power LED or LD and providing a light emitting device using the wavelength conversion member. The wavelength conversion member (11) includes a laminate that includes: a phosphor layer (1); and light-transmissive heat dissipation layers (2) formed on both surfaces of the phosphor layer (1) and having a higher thermal conductivity than the phosphor layer (1).