| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure capable of easily adapting to a change of an irradiation region in a light source unit in which a light-emitting element substrate mounted with a light-emitting element is attached to a heat sink.SOLUTION: A heat sink 2 comprises a plurality of heat sink blocks 21-23 that are juxtaposed in line and connected together in the state of abutting on one another. A light-emitting element substrate 3 mounted with a plurality of light-emitting elements 4 is attached onto each of the heat sink blocks. The light-emitting element substrates attached to surfaces of the plurality of heat sink blocks are arrayed in such a manner as to be flush with each other. |
