| 摘要 |
PROBLEM TO BE SOLVED: To provide an image projection device capable of improving the illumination balance in irradiated planes in a reflection type image display device and on a screen, with a simple configuration.SOLUTION: The image projection device includes: an illumination optical system; a reflection type image display device for reflecting illumination light depending on inclination angles of a plurality of micro-mirrors arranged two-dimensionally; and a projection optical system for projecting reflection light from the micro-mirrors on a projection plane. The illumination optical system includes: a light source; a condenser for condensing light emitted from the light source; an illumination equalizing element having an incident end in the vicinity of the condenser; a plurality of relay lenses and return mirrors arranged between an emission end of the illumination equalizing element and the reflection type image display device. The projection optical system includes: a projection lens comprising a plurality of lenses; and a mirror for reflecting reflection light toward the projection plane through the projection lens. A transparent flat plate member in which an incident surface and an emission surface are nonparallel to each other is arranged on an optical path between the light source and the illumination equalizing element. |
