Optical devices based on non-periodic sub-wavelength gratings
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United States of America Patent
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Aug 28, 2018
Grant Date -
Jul 9, 2015
app pub date -
Jan 14, 2015
filing date -
Jan 29, 2010
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Abstract
Various embodiments of the present invention are directed to optical devices comprising planar lenses. In one aspect, an optical device includes two or more planar lenses, and one or more dielectric layers. Each planar lens includes a non-periodic, sub-wavelength grating layer, and each dielectric layer is disposed adjacent to at least one planar lens to form a solid structure. The two or more planar lenses are substantially parallel and arranged to have a common optical axis so that light transmitted through the optical device substantially parallel to the optical axis is refracted by the two or more planar lenses.
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