| 摘要 |
PROBLEM TO BE SOLVED: To efficiently cool a two-dimensional direction inner portion of a light-emitting element holding member of a light-emitting element group on a light irradiation side.SOLUTION: A light source unit 1 emits, toward an irradiated object, light emitted from a light source group constituted by arranging light sources 11-1 to 11-12 on a light source support 13 in a two-dimensional direction. The light source support includes, on a two-dimensional direction inner side (an annular inner side of the light sources 11-1 to 11-12) of the light source group, a ventilation hole 2 for causing cooling air supplied from a rear side of the light irradiation side of the light source group to flow to the light irradiation side of the light source group. |
