Manufacture of composite optical materials
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United States of America Patent
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Feb 7, 2017
Grant Date -
Oct 31, 2013
app pub date -
Jan 12, 2012
filing date -
Jan 12, 2011
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Abstract
A polymer opal material comprises a three dimensionally periodic arrangement of core particles in a matrix material and exhibits structural color via Bragg reflection. IN a process for manufacturing such a material, a sandwich structure is provided, of a precursor composite material held between first and second sandwiching layers. A relative shear strain of at least 10% is imposed on the precursor composite material by curling the sandwich structure around a roller. The shear strain is cycled, in order to promote the formation of the three dimensional periodic arrangement.
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