Originally Posted by
Lelarep
What I don't understand is how it is any more resistant when the improved oxide layers are below the anti-particulate layer, and the superhydrophobic top coat. If you pierce those two layers, aren't you going to see a noticeable mark on the lenses?
Unless they are trying to say that there is some kind of interlayer reinforcement of those upper layers? Are the layers really as discrete as they seem in the diagram, or is there interlayer molecular linking (either physically or through atomic/molecular force interaction)? That would easily allow force/energy transmission throughout the stack and dispersion/mitigation. If the layers do interact with one another, in some manner, then I can see how they do reinforce one another.
Also, are the layers as rigid as one might think, or is there some "bounce" or flex to them? If one could increase the elastic interaction between a contacting object and the stack, it would be possible to turn a potentially piercing/slicing impact into a glancing blow by dissipating the energy of the impact through the kinetic action of the stack countering the applied force.
I've never really given the AR stack a ton of thought, but I can see how it is a fascinating area of research and practical application for people who are versed in material science and the application of thin films.