Low-twist chiral optical layers and related fabrication methods
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United States of America Patent
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Aug 27, 2013
Grant Date -
Mar 28, 2013
app pub date -
Nov 19, 2012
filing date -
Apr 16, 2007
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Abstract
An optical element includes a first and second stacked birefringent layers. The first birefringent layer includes local anisotropy patterns having respective relative orientations that vary over a first thickness between opposing faces of the first birefringent layer to define a first twist angle. The second birefringent layer includes local anisotropy patterns having respective relative orientations that vary over a second thickness between opposing faces of the second birefringent layer to define a second twist angle different than the first twist angle. Related devices and fabrication methods are also discussed.
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