| 摘要 |
A lamp cartridge comprising a lamp (7) as a light source, a reflector (2) for condensing light radiated from the lamp (7), a casing (3) covering the lamp (7) and the reflector (2) and supporting the reflector (2), and a fan (4) provided on a side window (10) of the casing (3), which covers the side of the reflector (2), and discharging heat inside the casing (3), wherein a hole (5) including an optical axis of the reflector (2) and having a smaller diameter than that of the reflector (2) is formed on that one of surfaces, which define the casing (3) and through which light beams from the reflector (2) radiate, and outside air is introduced into the casing (3) through the hole (5) to permit the fan (4) to discharge heat generated from the lamp (7) and the reflector (2). |
