| 摘要 |
Light source device, including an alternating current high-pressure mercury lamp having a pair of opposed electrodes within a spherical light-emitting part containing at least 0.15 mg/mm3 of mercury and 10-6 mumol/mm3 to 10-2 mumol/mm3 of halogen, and cylindrical hermetically sealed portions extending from both ends of the light-emitting part. External leads protrude from the ends of the light-emitting part. A reflecting mirror has a concave reflecting part surrounding the light-emitting part and a cylindrical neck part. An adhesive fills a periphery one of the hermetically sealed portions in the area of the external leads in a manner fulfilling the relationship L1/R>=0.5 where L1 (mm) is the length along the hermetically sealed portion filled with an adhesive and R (mm) is the diameter of the hermetically sealed portions. Feed wires connect to the external leads and openings for the feed wires can be formed in the reflecting part with flexible tubes between them.
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