| 摘要 |
PROBLEM TO BE SOLVED: To provide an illuminator used for a projector which can present superior effects in the aspect of video expression or adaptability to use environments by changing the quantity of light incident on an optical modulation means without changing the light output intensity of a lamp. SOLUTION: The illuminator 1 is provided with a light source 2, two fly-eye lenses 3 and 4 composing a uniform illumination means and a shading plate 5 having openings 5a capable of substantially transmitting a plurality of light source images (partial luminous flux) acquired by the uniform illumination means. By moving or rotating the shading plate 5 on the basis of information from the outside, the quantity of light transmitted through the shading plate 5 can be adjusted. COPYRIGHT: (C)2007,JPO&INPIT
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