Wavelength separation device, projector, and image display system
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United States of America Patent
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Apr 21, 2015
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app pub date -
Mar 8, 2013
filing date -
Mar 14, 2012
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Abstract
A wavelength separation device includes a waveplate adapted to convert the polarization direction of light in a predetermined wavelength band so that right-eye and left-eye image light in a time-divisional manner can be separated into first outgoing light as first polarized light in a first wavelength band and second outgoing light as second polarized light in a second wavelength band, a polarization control element adapted to keep the polarization direction of the first and the second outgoing light input from the waveplate in the case of either one of the right-eye and the left-eye image light, and respectively change the polarization direction of the first and the second outgoing light input from the waveplate in the case of the other thereof, and a polarization plate adapted to absorb one of the first polarized light and the second polarized light, and transmit the other thereof.
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