| 摘要 |
Provided is a light source device that uniformly illuminates the entire surface of the effective region of a phosphor and that can reduce the size of the optical system of a light source. Also provided is a projection device incorporating the light source device. A light source device 21 is provided with the following: a laser-beam forming unit 31 that projects excitation light EL; a phosphor 41 that radiates fluorescence FL as a result of the excitation light EL being projected thereto; a polarizing dichroic mirror 32 that is disposed on the light path between the laser beam forming unit 31 and the phosphor 41, and that splits the fluorescence FL from the light path of the excitation light EL; and a fly's-eye optical system 36 that equalizes the intensity distribution of the excitation light EL and the intensity distribution of the fluorescence FL. The fly's-eye optical system 36 equalizes the intensity distribution of both the excitation light EL and the fluorescence FL as a result of at least a portion of the fly's-eye optical system 36 being disposed on the light path between the polarizing dichroic mirror 32 and the phosphor 41, and as a result thereof, the fly's-eye optical system 36 can reduce the size and cost of the light source device 21 and uniformly illuminate the effective region of the phosphor 41 using the excitation light EL. |
