Illumination optical system and projection type color image display apparatus using the same
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United States of America Patent
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Issued Date -
Oct 10, 2002
app pub date -
Mar 13, 2002
filing date -
Mar 22, 2001
priority date (Note) -
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Abstract
In an illumination optical system comprising a reflector for reflecting illumination light emitted from a luminous body, and a color wheel for decomposing the illumination light into a plurality of color light components, the color wheel is arranged with a predetermined angle near a position where the illumination light attains the smallest luminous flux diameter or is arranged substantially orthogonal to the optical axis while being separated from the position where the illumination light attains the smallest luminous flux diameter by a predetermined distance along the optical axis.
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