Elecronically tunable optical periodic surface filters with an alterable resonant frequency
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United States of America Patent
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Apr 8, 1997
Issued Date -
N/A
app pub date -
May 30, 1995
filing date -
Jun 8, 1992
priority date (Note) -
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Abstract
Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. The surface filter comprising and electronically tunable electro-optic material to alter the resonant frequency of the element.
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