Ultra Broadband Multilayer Dielectric Beamsplitter Coating
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
May 15, 2013
filing date -
May 15, 2012
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Abstract
Coatings for optical devices, such as beamsplitters, are provided. The coatings include at least one bilayer of a layer of a material having an index of refraction n1 in contact with a layer of a material having an index of refraction n2 and an uppermost layer of a material having an index of refraction n3 over the bilayer, wherein n3>n2>n1. The bilayer(s) can be composed of BaF2 and KRS5. The uppermost layer can be composed of Ge. Certain coatings provide beamsplitters which exhibit highly efficient emission over broad spectral ranges.
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