TFCalc is capable of designing multilayer coatings for many applications. To aid the designer, 36 sample designs are included with TFCalc.
Notch (or Minus) FiltersA notch, or minus, filter requires that the transmittance be minimized in a rejection band and maximized outside of that band. The rejection band is usually narrow. This type of filter is one of the most difficult to design. The graphic below shows the performance of a 34-layer notch filter.
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