| 摘要 |
PROBLEM TO BE SOLVED: To set an outgoing direction of a laser beam to an arbitrary direction with respect to a substrate when a plurality of semiconductor laser elements are formed on the substrate, and to perform effective cooling of a light-emitting layer.SOLUTION: A light exposure head 1 comprises: one semiconductor substrate (a substrate 10); a plurality of semiconductor laser element parts 2, which uses the substrate 10 as a common substrate, each having a light-emitting layer 2A along a surface of the substrate 10, and a pair of resonator end surfaces 20 vertical to the surface; a recessed groove part 3 formed between the resonator end surfaces 20 of adjacent semiconductor laser element parts 2; and a reflection surface 4 facing a light emission surface of the semiconductor laser element parts 2, in the recessed groove part 3, and reflecting a laser beam Lb emitted from the light emission surface to the substrate 10 side. An exposed surface is irradiated with the laser beam Lb via the substrate 10. |
