Optical device and image display apparatus
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United States of America Patent
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Jul 17, 2018
Grant Date -
Jul 24, 2014
app pub date -
Jan 15, 2014
filing date -
Jan 22, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An optical device includes a light-conducting member, having a first panel surface disposed facing an image forming unit, that conducts image light incident on a light entry plane formed at an end of the first panel surface to a light exit plane formed in front of the viewer's eye; a first diffractive optics element, provided on the light entry plane, that diffracts the image light incident on the light entry plane in a predetermined direction and transmits that light into the light-conducting member; a second diffractive optics element, provided on the light exit plane, that diffracts the image light exiting from the light exit plane in a predetermined direction and transmits that light to the front of the viewer's eye; and one or more reflective planes disposed within a waveguide for the image light diffracted by the first diffractive optics element.
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