Abstract: A light source unit includes a plurality of light source devices connected together, wherein each of the plurality of light source devices comprises: a substrate on which a plurality of solid state light sources are disposed; a heat radiator including a joint surface joined to the substrate, a connecting part connected to any of the other light source devices, and a radiating fin for dissipating heat of the substrate; a housing to accommodate the radiating fin, the housing having, near the radiating fin, a first opening for distributing a gas; and a fan to distribute the gas to the radiating fin, and wherein the first openings of the light source devices different from each other are opposed to each other so that a clearance for distributing the gas is provided therebetween.

Abstract: A light irradiation unit includes a substrate having a longitudinal direction, the longitudinal direction being a first axis direction; multiple light sources arranged along the first axis direction on a first surface of the substrate; a heat dissipation member arranged on a second surface of the substrate opposite to the first surface; and a housing having a pair of first side surfaces holding the heat dissipation member therebetween in a second axis direction orthogonal to the first axis direction along the first surface. The substrate has, at an end portion in the first axis direction, an end surface intersecting the first axis direction. The location of the end surface in the first axis direction is near an edge of the first side surface along the first axis direction. The end surface is exposed from the housing or covered by a detachable protection member.

Abstract: A light irradiation unit includes a substrate having a longitudinal direction, the longitudinal direction being a first axis direction; multiple light sources arranged along the first axis direction on a first surface of the substrate; a heat dissipation member arranged on a second surface of the substrate opposite to the first surface; and a housing having a pair of first side surfaces holding the heat dissipation member therebetween in a second axis direction orthogonal to the first axis direction along the first surface. The substrate has, at an end portion in the first axis direction, an end surface intersecting the first axis direction. The location of the end surface in the first axis direction is near an edge of the first side surface along the first axis direction. The end surface is exposed from the housing or covered by a detachable protection member.

Abstract: The light source device of the present invention has a light source unit having a plurality of LED elements; a first optical system that collimates each of light emitted from the light source unit; and a second optical system that collects a plurality of light emitted from the first optical system. At least one of the light source unit and the first optical system is provided with an adjustment mechanism for adjusting a positional relationship between the light source unit and the first optical system relative to each other.

Abstract: The light source device of the present invention has a light source unit having a plurality of LED elements; a first optical system that collimates each of light emitted from the light source unit; and a second optical system that collects a plurality of light emitted from the first optical system. At least one of the light source unit and the first optical system is provided with an adjustment mechanism for adjusting a positional relationship between the light source unit and the first optical system relative to each other.

Abstract: A light irradiation device includes a protective tube, which has a wire insertion path therein, a light source unit facing and disposed along an upper part of the protective tube, and a gutter-shaped concave reflection mirror facing the light source unit and provided below the protective tube. The concave reflection mirror is received in a gutter-shaped concave accommodating part provided in a holding body, and has flange portions extending from the outer surface in the horizontal direction. The convex reflection mirror is detachably affixed to the holding body with the flange portions.

Abstract: A light irradiation device includes a protective tube, which has a wire insertion path therein, a light source unit facing and disposed along an upper part of the protective tube, and a gutter-shaped concave reflection mirror facing the light source unit and provided below the protective tube. The concave reflection mirror is received in a gutter-shaped concave accommodating part provided in a holding body, and has flange portions extending from the outer surface in the horizontal direction. The convex reflection mirror is detachably affixed to the holding body with the flange portions.

Abstract: The light source device of the present invention has a light source unit having a plurality of LED elements; a first optical system that collimates each of light emitted from the light source unit; and a second optical system that collects a plurality of light emitted from the first optical system. At least one of the light source unit and the first optical system is provided with an adjustment mechanism for adjusting a positional relationship between the light source unit and the first optical system relative to each other.