| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical system capable of prolonging a service life of a fiber.SOLUTION: An optical system 13 makes emission light emitted from multiple light-emitting portions ep incident on a single optical fiber 12. The multiple light-emitting portions ep are disposed side by side in a first direction d1.In the optical system 13, a condensing center of each emission light emitted from the multiple light-emitting portions ep is shifted from each other at least in a second direction d2. |
