| 摘要 |
PROBLEM TO BE SOLVED: To provide a light source device capable of suppressing deterioration of a rate of operation.SOLUTION: A light source device comprises: an opening in which at least a part of a lamp is arranged; a reflecting mirror which is installed at the surrounding of the opening and includes a reflecting surface of a concave shape for reflecting light emitted from the lamp; and a reflecting surface air feeding part which leads gas at least to the reflecting surface in the vicinity of the opening. |
