| 摘要 |
<p>A light source device includes an excitation light source configured to emit and stop an excitation light with a predetermined timing, a fluorescent wheel configured to rotate, the fluorescent wheel including a fluorescent material applied thereon for emitting a fluorescent light in a predetermined wavelength range when irradiated with the excitation light, and an irradiation spot changing unit configured to change a spot on the fluorescent material irradiated with the excitation light.
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