Optical retarders and related devices and systems
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United States of America Patent
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Apr 10, 2007
Issued Date -
N/A
app pub date -
Aug 13, 2004
filing date -
Dec 19, 2003
priority date (Note) -
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Abstract
In certain aspects, the disclosure relates to articles that include a plurality of walls configured to form a grating. Each of the plurality of walls can include a layer of a first material and a layer of a second material different from the first material. The articles can retard incident radiation at wavelengths .lamda..sub.1 and .lamda..sub.2 by amounts .GAMMA..sub.1 and .GAMMA..sub.2, respectively, where |.lamda..sub.1-.lamda..sub.2| is about 15 nm or more and .GAMMA..sub.1 is substantially equal to .GAMMA..sub.2.
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