| 摘要 |
A projection apparatus includes a light source having a light emitting portion having a finite size, a concave reflecting mirror for condensing light from the light source, a condenser lens unit for converting the beam of light from the concave reflecting mirror into a substantially collimated beam of light, a light valve for reflecting the beam of light from the condenser lens unit and spatially modulating the beam of light on the basis of predetermined image information, and a projection optical system for imaging the spatially modulated beam of light on a predetermined surface, a lens unit for condensing the beam of light from the light valve in the inside off-illumination area of the beam of light formed by the concave reflecting mirror and the condenser lens unit being disposed between the light valve and the projection optical system, a light dividing element for directing the beam of light from the condenser lens unit to the light valve and for directing the beam of light condensed by the lens unit to the projection optical system being disposed between the condenser lens unit and the light valve.
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