| 摘要 |
Aspects of the invention can provide an illuminator and others, which are able to supply polarized light having a certain oscillating direction as well as a certain wavelength range with high efficiency, and are suitable for a single-plate type projector using an LCD type spatial light modulator. The illuminator can include a light source, a rod integrator, a reflective polarizing plate, and a color filter. A reflecting mirror reflects polarized light, which has been reflected by the reflective polarizing plate, got injected into the rod integrator again through an emitting end, and progresses in the direction toward an injection end, in the direction toward the emitting end. Further, the reflecting mirror reflects light of any other wavelength range, which has been emitted through a first position of the emitting end, reflected by the color filter, got injected into the rod integrator again, and progresses in the direction toward an injection end, in the direction toward the emitting end to emit the light a second position that is different from the first position of the emitting end.
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