Illumination optical system and projector including fluorophore
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United States of America Patent
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Jan 5, 2016
Grant Date -
Jun 25, 2015
app pub date -
Mar 2, 2015
filing date -
Mar 18, 2011
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Abstract
A projector includes an illumination optical system, an image formation element that spatially modulates light from the illumination optical system, and a projection lens that projects the spatially modulated light. The illumination optical system includes a light source that emits light of a first wavelength, a fluorophore unit including a reflection region reflecting the light of the first wavelength and a fluorophore region including a fluorophore emitting fluorescent light of a wavelength that differs from the first wavelength by irradiation of the light of the first wavelength, an optical element reflecting the light of the first wavelength, and a quarter-wave plate provided on a light path between the optical element and the fluorophore unit.
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