Optical element and image sensor
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United States of America Patent
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May 19, 2015
Grant Date -
Oct 4, 2012
app pub date -
Mar 30, 2012
filing date -
Apr 1, 2011
priority date (Note) -
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Abstract
An optical element includes a refractive index pattern that is periodically formed by a plurality of media having refractive indices different from each other. The highest diffraction order for a light beam of a first wavelength region that enters the optical element is greater than the highest diffraction order for a light beam of a second wavelength region that is longer than the first wavelength region, and the light beams of the first wavelength region and the second wavelength region are emitted so that each of the light beams of the first wavelength region and the second wavelength region is periodically localized.
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