How Moth Inspired Anti-reflective Surface Coatings
Various Lepidoptera · Animal · Worldwide; nocturnal habitats
What if the solution to this engineering challenge had already been perfected — by a moth (nocturnal moths) over 100 million years of evolution?
The Natural Innovation
Corneal nanostructures on moth eyes form a gradient refractive index that eliminates surface reflections across all wavelengths and angles — maximizing light capture at night while hiding the eye from predators
The moth (nocturnal moths) lives in Worldwide; nocturnal habitats.
In the language of biomimicry, this falls under the Sense › Detect light category.
The Design Principle
A subwavelength array of tapered nanopillars creates a smooth transition in refractive index from air to substrate, eliminating the sharp interface that normally causes reflection
Human Applications
Anti-reflective coatings for solar panels, camera lenses, phone screens, and architectural glass — increasing transmission and reducing glare
Real-world implementations include: Moth-eye film by Mitsubishi Rayon; Solarmer Energy moth-eye solar cells; anti-glare screen protectors.
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A subwavelength array of tapered nanopillars creates a smooth transition in refractive index from air to substrate, eliminating the sharp interface that normally causes reflection
Source: AskNature.org
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