Image display device
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United States of America Patent
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Issued Date -
Sep 1, 2016
app pub date -
Feb 22, 2016
filing date -
Feb 27, 2015
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Abstract
An image display device includes: a video light generation unit that generates video light modulated based on a video signal; a light diffraction unit (first diffraction optical element) that diffracts the video light emitted from the video light generation unit; a light scanning unit (light scanner) that spatially scans the video light; and a reflection unit that includes a light diffraction unit (second diffraction optical element) that diffracts video light scanned by the light scanning unit. A light reflection unit included in the light scanning unit is configured by the light diffraction unit. In the light diffraction unit, an interference fringe pitch is preferably constant. The light diffraction unit has portions in which interference fringe pitches are mutually different.
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