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Appl Opt. 2011 Mar 20;50(9):C86-9. doi: 10.1364/AO.50.000C86.

Expanded viewpoint for broadband antireflection coating designs.

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  • 1Willey Optical Consultants, 13039 Cedar Street, Charlevoix, Michigan 49720, USA.


Examining spectral regions outside of the band where an antireflection coating is specified can aid in finding optimal design solutions. The reflectance versus wavenumber plots at low frequencies indicate the overall thickness of the design. These plots also point to whether the design will provide the minimum possible average reflectance in the specified band. It has been discovered that these patterns are nearly replicated by the plot of a quarter-wave stack at peak frequency. It is also found that optimal solutions exist only at quantized intervals.

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