Abstract: A hologram manufacturing device includes a master hologram on which a diffraction grating is formed, a duplicate hologram disposed close to the master hologram, a first light source that emits, to the master hologram and the duplicate hologram, a first laser light that satisfies a Bragg diffraction condition in the diffraction grating, a second light source that emits, to the master hologram and the duplicate hologram, a second laser light that does not satisfy the Bragg diffraction condition in the diffraction grating, and a sensor that measures the second laser light. The hologram manufacturing device ends exposure of the duplicate hologram with the first laser light based on a measurement result of the sensor.

Abstract: A vehicle headlamp includes a projection lens, a first lens, a second lens, a first light source, and a second light source. The first lens and the second lens are behind the projection lens. The first light source is behind the first lens. The second light source is behind the second lens. The first lens and the second lens deviate from an optical axis of the projection lens and are opposite to each other.

Abstract: An illumination device disposed on a moving body includes at least one main light source, and at least one auxiliary light source disposed in a periphery of the at least one main light source when seen along a traveling direction of the moving body. The illumination device further includes a first light guide disposed adjacent to the at least one main light source, that guides light transmitted from the at least one main light source, and a second light guide that is disposed adjacent to the at least one auxiliary light source, that guides light transmitted from the at least one auxiliary light source. The illumination device also includes an optical component that transmits the light from the first light guide and the light from the second light guide in the traveling direction of the moving body.

Abstract: An illumination device disposed on a moving body includes at least one main light source, and at least one auxiliary light source disposed in a periphery of the at least one main light source when seen along a traveling direction of the moving body. The illumination device further includes a first light guide disposed adjacent to the at least one main light source, that guides light transmitted from the at least one main light source, and a second light guide that is disposed adjacent to the at least one auxiliary light source, that guides light transmitted from the at least one auxiliary light source. The illumination device also includes an optical component that transmits the light from the first light guide and the light from the second light guide in the traveling direction of the moving body.

Abstract: A vehicle headlamp includes a projection lens, a first lens, a second lens, a first light source, and a second light source. The first lens and the second lens are disposed behind the projection lens. The first light source is disposed behind the first lens. The second light source is disposed behind the second lens. The first lens and the second lens are disposed so as to deviate from an optical axis of the projection lens and to be opposite to each other.

Abstract: There is provided a light guide body, containing: a first end region; a second end region located on an opposite side of the first end region; first dots; and second dots having a dot in the first end region being smaller than a dot in the second end region, wherein a size difference between the first dots and the second dots in the first end region is smaller than a size difference between the first dots and the second dots in the second end region.

Abstract: There is provided a light guide body, containing: a first end region; a second end region located on an opposite side of the first end region; first dots; and second dots having a dot in the first end region being smaller than a dot in the second end region, wherein a size difference between the first dots and the second dots in the first end region is smaller than a size difference between the first dots and the second dots in the second end region.

Abstract: An object of the present disclosure is to provide a surface light source lighting device capable of realizing direction control and a stable operation with respect to vibration or a great temperature change, required for use in a backlight. This surface light source lighting device causes linear light incident from a light source (2a) to be incident to an edge surface (1L) of a light guide plate (1) via a light incidence portion (3a) including a light incidence lens and a louver, and can thus maintain high reliability with respect to vibration or a temperature change in a use environment. In the light guide plate (1), light reflected by a first light guide pattern (4A) provided on a rear surface thereof is reflected by a second light guide pattern (4B) provided on the same rear surface so that an emission direction is set, and thus light is emitted from a front surface of the light guide plate (1) with desired distribution characteristics.

Abstract: To easily increase display quality of light even in a case of a long light guide body. Depth h1 of a first dot (106) is larger than depth h2 of a second dot (108) in the vicinity of a light source, and, as a location comes closer to an end on an opposite side to the light source, depth h1 of the first dot (106) is reduced, and depth h2 of the second dot (108) is increased. Therefore, it is possible to easily increase display quality of light even in a case of a long light guide body.

Abstract: To easily increase display quality of light even in a case of a long light guide body. Depth h1 of a first dot (106) is larger than depth h2 of a second dot (108) in the vicinity of a light source, and, as a location comes closer to an end on an opposite side to the light source, depth h1 of the first dot (106) is reduced, and depth h2 of the second dot (108) is increased. Therefore, it is possible to easily increase display quality of light even in a case of a long light guide body.

Abstract: An object of the present disclosure is to provide a surface light source lighting device capable of realizing direction control and a stable operation with respect to vibration or a great temperature change, required for use in a backlight. This surface light source lighting device causes linear light incident from a light source (2a) to be incident to an edge surface (1L) of a light guide plate (1) via a light incidence portion (3a) including a light incidence lens and a louver, and can thus maintain high reliability with respect to vibration or a temperature change in a use environment. In the light guide plate (1), light reflected by a first light guide pattern (4A) provided on a rear surface thereof is reflected by a second light guide pattern (4B) provided on the same rear surface so that an emission direction is set, and thus light is emitted from a front surface of the light guide plate (1) with desired distribution characteristics.

Abstract: The present invention provides a brominated flame retardant determining method that determines whether or not a brominated flame retardant is contained in a determination target object by emitting light to the determination target object composed of resin, receiving reflected light from the determination target object emitted with the light, calculating an absorption spectrum of the determination target object based on the reflected light, and determining whether or not a brominated flame retardant is contained in the determination target object in the absorption spectrum, based on an absorption spectrum in a wavelength band of 1.40 ?m or more and 2.50 ?m or less.

Abstract: In a solar power generation device concentrating solar light to solar cells by a reflecting mirror and converting solar energy into electric energy, a cooling pipe is arranged above the reflecting mirror, a thermoelectric conversion element is mounted on at least one side surface of the cooling pipe and a solar cell is mounted on an upper surface of the thermoelectric conversion element.

Abstract: A solar cell module is provided with a plurality of solar cells each having a rectangular shape with chamfered corners, a protection member arranged in a light receiving surface side of the solar cells, and a reflection member having a rectangular shape in a plan view. The reflection member is arranged in an area surrounded by the solar cells. The reflection member includes a reflection surface. The reflection surface includes a plurality of areas. The areas are provided so that reflection directions of light perpendicular to the light receiving surfaces are different from each other in adjacent ones of the areas, the adjacent ones being adjacent to each other in a row direction or a column direction of the solar cells.

Abstract: A solar cell module includes solar cells, a wiring member electrically connecting the solar cells, a first protection member provided on a light-receiving-surface side of the solar cells, a second protection member provided on a back-surface side of the solar cells, and a sealing material provided between the first protection member and the second protection member to seal the solar cells therein. The first protection member has a first texture on one of principal surfaces thereof that faces the opposite side of the solar cells. The wiring member has a second texture on one of principal surfaces thereof that faces the first protection member. The first texture and the second texture are provided such that, in a plan view, a normal to a surface of the first texture is not parallel to a normal to a surface of the second texture.

Abstract: A flexible solar cell sheet includes plural through incisions provided between solar cell strings in a direction along the solar cell strings. The solar cell sheet is bonded to a transparent curved surface substrate having three-dimensional curvature. Stress generated inside a surface of the solar cell sheet when the sheet is bonded along the curved surface of the transparent curved surface substrate can be alleviated by the through incisions, and bonding can be performed while suppressing twists and wrinkles occurring in the solar cell sheet.

Abstract: A solar cell module is provided with a plurality of solar cells each having a rectangular shape with chamfered corners, a protection member arranged in a light receiving surface side of the solar cells, and a reflection member having a rectangular shape in a plan view. The reflection member is arranged in an area surrounded by the solar cells. The reflection member includes a reflection surface. The reflection surface includes a plurality of areas. The areas are provided so that reflection directions of light perpendicular to the light receiving surfaces are different from each other in adjacent ones of the areas, the adjacent ones being adjacent to each other in a row direction or a column direction of the solar cells.

Abstract: The present invention provides a brominated flame retardant determining method that determines whether or not a brominated flame retardant is contained in a determination target object by emitting light to the determination target object composed of resin, receiving reflected light from the determination target object emitted with the light, calculating an absorption spectrum of the determination target object based on the reflected light, and determining whether or not a brominated flame retardant is contained in the determination target object in the absorption spectrum, based on an absorption spectrum in a wavelength band of 1.40 ?m or more and 2.50 ?m or less.