| 摘要 |
In the present disclosure, temperature-dependent changes in the illumination characteristics of a light source device are minimized. The light source device is provided with the following: a light-emitting part (3); a light guide (4) having in the center a columnar part whose central axis direction is a lengthwise direction, that guides light input into an end face from the light-emitting part (3) in a lengthwise direction of the columnar part, and outputs light from a side face of the columnar part; a light guide holder (5) that covers an end of the light guide (4) except for at least part of the end face; and a support part (7), having a through-hole that penetrates from one face to another face formed therein, that holds an end of the light guide holder (5) on a side of a first opening on the one face of the through-hole so as to allow sliding in the lengthwise direction, or alternatively, the end of the light guide holder (5) stretches in the lengthwise direction inside the first opening or above the first opening, and light from the light-emitting part (3) is input into the light guide via a second opening on the other face of the through-hole, or alternatively, the light-emitting part (3) is disposed in the second opening, and the support part (7) supports an optical filter (6) between the first opening and the second opening while maintaining a designated spacing with the light-emitting part (3). |
