New answers tagged optical-coating
I guess the most important reason for using subwavelength anti-reflection coating are the problems related with strong curvature of lenses. Multi-layer AR coatings work perfect for flat surfaces and lenses which are not too much bended. For the strong aspheres used for example by Nikon in all new zoom lenses like 14-24 f/2.8 see Nikon Precision Glass Mold ...
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