Patent ID: 6340237
Filing Date: 2002-01-22
Classification: F21V,Y10S

Abstract:
A lamp cartridge, comprising:a lamp utilized as a light source; a reflecting mirror for converging light emitted by the lamp; a case for covering the lamp and the reflecting mirror and for supporting the lamp and the reflecting mirror; and a fan, for exhausting heat from within the case, disposed at a window positioned on a side surface of the case covering a side of the reflecting mirror, said side surface being parallel to an optical axis of the reflecting mirror, wherein one of at least one surface forming the case from which a ray emitted from the reflecting mirror goes out includes an optical axis of the reflecting mirror and has a hole having a diameter smaller than the reflecting mirror formed thereon, and wherein outside air is introduced into the case through the hole and heat generated by the lamp and the reflecting mirror is exhausted by the fan.