| 摘要 |
A projector comprises a light source device 413 in which a light source cooling air flow channel X for introducing a cooling air to an internal light source lamp 411 is formed and an internal housing 47 for housing an optical element unit 600, which subjects the light beam emitted from this light source device 413 to an optical processing. The internal housing 47 is formed with a pair of optical element cooling opening portions 471A, 472A, which are oppositely arranged by mutually pinching the optical element unit 600 in order to allow a cooling air to pass through according to the arrangement of the optical element unit 600. Further, the underside of the internal housing 47 is provided with a fan 54, in which a suction port 54A is directed to the opening portion 471A and an exhaust port 54B is connected to the light source cooling air flow channel X. Since an air flows along an arrow marked channel, the optical element unit 600 and the light source lamp 411 can be sufficiently cooled.
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