Abstract: A light source device of the present disclosure includes a sapphire plate having a first surface and a second surface facing each other, a wavelength conversion material located opposite the first surface of the sapphire plate, and a first excitation light source emitting a first excitation light having directivity to the wavelength conversion material through the second surface, in which an angle between the first surface and the second surface, and a c-axis of sapphire less than 10°, and an angle between the c-axis and an optical axis of the first excitation light is 5° or more and 75° or less.

Abstract: A foamable resin composition includes a styrenic thermoplastic elastomer and a dynamically crosslinked thermoplastic elastomer in a total amount of 100 parts by mass. An amount of the dynamically crosslinked thermoplastic elastomer is 10 to 40 parts by mass. The composition further includes high-temperature expandable microcapsules and low-temperature expandable microcapsules in a total amount of 25 to 50 parts by mass relative to 100 parts by mass of the elastomers, and an amount of the low-temperature expandable microcapsules is 17 to 67% by mass relative to the total amount of the two types of microcapsules.

Abstract: An infrared sensor cover includes a decorative layer, a transparent first base, and a transparent second base. The decorative layer includes a first surface and a second surface opposite the first surface. The first base is made of a resin molded body and disposed on the first surface of the decorative layer. The second base is made of a resin molded body and disposed on the second surface of the decorative layer. An absolute value of a difference between refractive indices of a first resin material of the first base and a second resin material of the second base is less than or equal to 0.05. An absolute value of a difference between heat deflection temperatures of the first resin material and the second resin material is greater than or equal to 15 degrees.

Abstract: A vehicle exterior part is configured to be arranged frontward of a millimeter wave radar device with respect to the transmission direction of millimeter waves. The vehicle exterior part includes an ornamental body, a light source that emits light, and a light diffuse reflection member. The light diffuse reflection member is millimeter wave-transmissive and diffuses and reflects light. The ornamental body includes a base and an ornamental layer. The base is millimeter wave-transmissive and diffuses and transmits the light. The ornamental layer is millimeter wave-transmissive and arranged frontward of the base with respect to the transmission direction. The light source, the ornamental body, and the light diffuse reflection member are arranged so that the light emitted from the light source is diffused and reflected by the light diffuse reflection member and directed toward the base.

Abstract: A light source device of the present disclosure includes a sapphire plate having a first surface and a second surface facing each other, a wavelength conversion material located opposite the first surface of the sapphire plate, and a first excitation light source emitting a first excitation light having directivity to the wavelength conversion material through the second surface, in which an angle between the first surface and the second surface, and a c-axis of sapphire less than 10°, and an angle between the c-axis and an optical axis of the first excitation light is 5° or more and 75° or less.

Abstract: A light source device of the present disclosure includes a sapphire plate having a first surface and a second surface facing each other, a wavelength conversion material located opposite the first surface of the sapphire plate, and a first excitation light source emitting a first excitation light having directivity to the wavelength conversion material through the second surface, in which an angle between the first surface and the second surface, and a c-axis of sapphire is greater than 80°, and an angle between the c-axis and an optical axis of the first excitation light is 20° or more. A lighting device of the present disclosure includes the light source device and a light guide member.

Abstract: A light source device of the present disclosure includes a sapphire plate having a first surface and a second surface facing each other, a wavelength conversion material located opposite the first surface of the sapphire plate, and a first excitation light source emitting a first excitation light having directivity to the wavelength conversion material through the second surface, in which an angle between the first surface and the second surface, and a c-axis of sapphire is greater than 80°, and an angle between the c-axis and an optical axis of the first excitation light is 20° or more. A lighting device of the present disclosure includes the light source device and a light guide member.

Abstract: A composite substrate of the present disclosure includes a piezoelectric substrate having a first surface which is an element formation surface and a second surface which is a back surface of the first surface, a sapphire substrate having a third surface which is disposed opposing a second surface and a fourth surface which is a back surface of the third surface, a fifth surface opposing the second surface, and a sixth surface opposing the third surface. It includes an alumina layer bonding the second surface and the third surface, and an arithmetic mean roughness Ra of the third surface is 0.1 ?m or more and 0.5 ?m or less. The arithmetic mean roughness Ra of the fifth surface is 0.1 ?m or less and is smaller than the arithmetic mean roughness Ra of the third surface.

Abstract: The present invention provides a resin material composition including 25 to 65% by mass of a thermoplastic polyolefin resin, 0.5 to 22% by mass of a glass wool, and 5 to 35% by mass of a thermoplastic elastomer.

Abstract: The present invention provides a resin material composition including 25 to 65% by mass of a thermoplastic polyolefin resin, 0.5 to 22% by mass of a glass wool, and 5 to 35% by mass of a thermoplastic elastomer.

Abstract: Provided is a solar cell element comprising a semiconductor substrate which has a p-type semiconductor region, wherein one or more surface layer-internal regions which have Si—O bonds are formed in the surface layer part of the p-type semiconductor region and a passivation layer is formed on the surface layer-internal regions. Also provided is a solar cell module comprising the solar cell element. A method for producing a solar cell element is further provided, said method comprising: a substrate preparation step for preparing a semiconductor substrate which has a p-type semiconductor region; a surface treatment step for exposing the surface of the p-type semiconductor region to plasma produced using an oxygen-containing gas, and forming surface layer-internal regions which have Si—O bonds in the surface layer part of the p-type semiconductor region; and a layer formation process for forming a passivation layer on the surface layer-internal regions.