| 摘要 |
A light source device has a first mirror for reflecting light emitted by a light source, and a second mirror for reflecting the light reflected by the first mirror and guiding the reflected light toward the irradiation target portion. The first mirror has a curved reflection surface having an elliptic or parabolic shape in section along the optical axis direction. The light source is set at the position of a focal point of the elliptic or parabolic shape of the curved reflection surface. The second mirror has a linear reflection surface which has a linear shape in section along the optical axis direction and faces the curved reflection surface of the first mirror.
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