| 摘要 |
A light source device ( 411 ) has a lamp body ( 411 A) including a light source lamp, a reflector ( 417 ) and an anti-explosion glass ( 418 ), and a lamp housing ( 411 B) for accommodating the lamp body ( 411 A). A plurality of projections ( 411 B 8 ) protruding along an optical axis of a light beam irradiated by the light source lamp are formed on the lamp housing ( 411 B). Further, the reflector ( 417 ) has an approximately concave cross section and a positioning surface ( 417 C) that touches the projections ( 411 B 8 ) of the lamp housing ( 411 B) to locate the lamp body ( 411 A) relative to the lamp housing ( 411 B) is provided on a distal side of the concave section. The positioning surface ( 417 C) is continuously flush.
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