Abstract: To appropriately suppress reflection of far-infrared rays, and appropriately form an antireflection film. A far-infrared ray transmission member (20) includes a base material (30) that transmits far-infrared rays, and a functional film (32) that is formed on the base material (30) and includes a low refractive index layer (34) containing oxide as a principal component and having a refractive index equal to or smaller than 1.5 with respect to light at a wavelength of 10 ?m. The low refractive index layer (34) contains MgO as a principal component, and a content of MgO is equal to or larger than 50 mass % and equal to or smaller than 100 mass % with respect to the entire low refractive index layer (34).

Abstract: To provide improved scratch resistance while transmitting light in a plurality of wavelength ranges. A transmission member (20) includes a base material (30) that transmits far-infrared rays, and a first functional film (32) that is formed on the base material (30). Average transmittance of the transmission member (20) with respect to light at a wavelength from 8 ?m to 12 ?m is equal to or larger than 50%, and transmittance of the transmission member (20) with respect to light from a laser beam source that emits light in a wavelength range from 0.8 ?m to 1.8 ?m is equal to or larger than 80%. A refractive index of an outermost layer (34) of the first functional film (32) with respect to light from the laser beam source is equal to or larger than 1.7.

Abstract: The present invention relates to a composite substrate for graphene film production, the composite substrate including: a substrate having a thermal expansion coefficient of 2.0×10?6 (K?1) or less; an oxide film; and a metal film containing Cu or Ni, in this order, in which a prescribed diffraction peak is observed by XRD measurement for the metal film by a ?-2? method, and in a chart obtained by the XRD measurement, a diffraction peak derived other than the prescribed diffraction peak is not observed, or an intensity of diffraction peak other than the prescribed diffraction peak is 1/10 or less of an intensity of the prescribed diffraction peak.

Abstract: To appropriately transmit a far infrared ray and improve scratch resistance. A far-infrared transmitting member 20 includes a substrate 30 that transmits a far infrared ray and a first functional film 32 that is formed on the substrate 30 and includes a NiOx layer 34 containing NiOx as a main component, an average transmittance of light having a wavelength of 8 ?m to 12 ?m is 50% or more, and a maximum value Hmax of indentation hardness in a range of an indentation depth of 40 nm or more and 110 nm or less from the surface of the functional film measured by a nanoindentation method is 10 GPa or more.

Abstract: To appropriately transmit far-infrared rays and improve scratch resistance. A far-infrared transmitting member (20) includes a base material (30) that transmits far-infrared rays and a first functional film (32) formed on the base material (30), in which an average transmittance for light having a wavelength of 8 ?m to 12 ?m is 50% or more, an outermost layer (36) of the first functional film (32) is a layer containing ZrO2 as a main component, a content of ZrO2 is 50 mass % or more and 100 mass % or less with respect to the whole outermost layer (36), and a refractive index of the outermost layer (36) with respect to light having a wavelength of 550 nm is 2.05 or more.

Abstract: A decrease in the detection accuracy of infrared rays is suppressed. Vehicle glass includes a light shielding region in which a far-infrared ray transmitting region is formed, the far-infrared ray transmitting region including an opening and a far-infrared ray transmitting member (20) disposed in the opening. In the far-infrared ray transmitting member (20), the average transmittance of far-infrared rays having wavelengths of 8 ?m to 13 ?m at a first position (P1) in a case where the far-infrared rays are emitted in a direction perpendicular to a surface (20a) on a vehicle exterior side is different from the average transmittance of the far-infrared rays having wavelengths of 8 ?m to 13 ?m at a second position (P2) that is lower than the first position (P1) in the vertical direction in a case where the vehicle glass is mounted to a vehicle.

Abstract: To appropriately transmit far-infrared rays while ensuring design. A far-infrared ray transmission member (20) includes a base material (30) configured to transmit far-infrared rays, and a functional film (31) formed on the base material (30). Dispersion of reflectances with respect to pieces of light at a wavelength of 360 nm to 830 nm in increments of 1 nm is equal to or smaller than 30, a reflectance with respect to visible light defined by JIS R3106 is equal to or lower than 25%, and an average transmittance with respect to light at a wavelength of 8 ?m to 12 ?m is equal to or higher than 50%.

Abstract: To appropriately suppress reflection of far-infrared rays, and appropriately form an antireflection film. A far-infrared ray transmission member (20) includes a base material (30) that transmits far-infrared rays, and a functional film (32) that is formed on the base material (30) and includes a low refractive index layer (34) containing oxide as a principal component and having a refractive index equal to or smaller than 1.5 with respect to light at a wavelength of 10 ?m. The low refractive index layer (34) contains MgO as a principal component, and a content of MgO is equal to or larger than 50 mass % and equal to or smaller than 100 mass % with respect to the entire low refractive index layer (34).