Patent Application for new lens coating

This patent look to be expanding on ASC (air sphere Coatings) 

To provide an optical member having an anti-reflection film with high strength, uniform refractive index distribution, and low scattering, and a manufacturing method for the optical member.

This actually looks like little bubbles as shown by Canon's image below:

Japan patent application, 2017-167271 

Richard CanonNewsRichard CanonNews

Richard has been using Canon cameras since the 1990s, with his first being the now legendary EOS-3. Since then, Richard has continued to use Canon cameras and now focuses mostly on infrared photography. Richard is the founder and editor of CanonNews since 2017, and has worked as a writer on CanonRumors and other websites in the past.

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