Moth-eye-principle

However, the arrangements of the natural world have been utilizing its optical behaviours with skills far beyond human intelligence. One T)f them is known as Moth Eye Principle and the eyes of a moth, flying in the air toward evening, have characteristic concave and convex structure. 

Clapham PB, HutleyMC. (1973) Reduaionof lens reflection by the moth eye principle. Nature (London) 244 281-282. 

Fig. 2.27 Illustration of an artificial antireflection structure based on the moth-eye principle...

Thornton BS. (1975) Limit of the moth s eye principle and other impedance-matching corrugations for solar-absorber design. / SocAm 65 267—270. 

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