| 摘要 |
A light source device ( 40 ) attached to an optical equipment provided with a light-source cooling fan ( 3 ) has a light source ( 401 ), a reflector ( 402 ), a light-transmissive component ( 51 ) that closes the light-irradiation side of the reflector ( 402 ) and a light source housing ( 50 ) that houses the above components. An opening ( 402 A) for introducing a cooling air is formed on the reflector ( 402 ) and an opening ( 52 ) is formed on the light source housing ( 50 ) at a position corresponding to the light source housing ( 50 ). A duct ( 53 ) of which light-irradiation side is opened is provided on the opening ( 52 ). When the light source device ( 40 ) is attached to the optical equipment, the duct ( 53 ) protrudes toward the light-irradiation side to be connected with the fan ( 3 ). The opening ( 52 ) is opened in accordance therewith, so that the air from the fan ( 3 ) is introduced into the reflector ( 402 ).
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