Universal antireflection coatings for substrates for the visible spectral region

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DOIResolve DOI: http://doi.org/10.1364/AO.35.004993
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TypeArticle
Journal titleApplied Optics
Volume35
Issue25
Pages49934997; # of pages: 5
Subjectantireflection coatings
AbstractIt is possible to design normal-incidence antireflection coatings that reduce the reflectance of any substrate with a refractive index that lies in the range of 1.48 to 1.75. The performance of such coatings depends on the width of the spectral region over which the reflectance is to be suppressed, on the coating materials used for their construction, and on the overall optical thickness of the layer system. For example, the calculated average spectral reflectance of a set of six different substrates with refractive indices 1.48, 1.55, 1.60, 1.65, 1.70, and 1.75, when coated with a 0.56-U+03BCm-thick, eight-layer antireflection coating designed for the 0.40U+20130.80-U+03BCm spectral region, was 0.34%. This is higher than the average reflectance that is attainable with a conventional antireflection coating of similar optical thicknesses designed for a particular refractive index. However, it is an acceptable value for most applications. With the universal type of antireflection coating described, it is thus possible to coat a number of different refractive-index substrates in one deposition run, and this can result in considerable cost and time savings.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number12338225
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Record identifier8e4b2cce-629e-43e2-b154-b29b2280dd17
Record created2009-09-10
Record modified2016-05-09
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