Image display apparatus having a diffraction optical element
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United States of America Patent
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Dec 4, 2018
Grant Date -
Jul 14, 2016
app pub date -
Jan 6, 2016
filing date -
Jan 9, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An image display apparatus includes a light source configured to emit image light, a scanning mirror configured to reflect the image light from the light source, and a reflective diffraction optical element configured to change a direction of the image light from the scanning mirror to a different direction in addition to regular reflection. The scanning mirror is arranged at a position and a height as different from an observing point as possible. A direction of extension of an interference fringe of the reflective diffraction optical element intersects incident light from the light source.
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