Coating copies the eye of a moth

Oct. 18, 2012
A group at the Max Planck Institute for Intelligent Systems (Stuttgart, Germany) has developed a new way to artificially produce moth eye-like coatings for optical devices.

Anti-reflective coatings (ARCs) based on nanomaterials are used in most optical devices, including glasses, lenses, TV screens, solar cells, and LED lights.

Some of the most efficient ARCs are found in the eyes of insects. The eyes of moths, for example, are covered with nanoscopic structures which allow almost no light to reflect off the surface. The natural coating eliminates glare, hiding the moths from predators and improving their nocturnal vision.

Recently, a group at the Max Planck Institute for Intelligent Systems (Stuttgart, Germany) co-ordinated by Professor Joachim Spatz has developed a new way to artificially produce moth eye-like coatings. According to the researchers, the coatings have a cost similar to that of existing ARCs.

The manufacturing process developed at the Max Planck Institute produces regular, tiny bumps on the surface of a material that are similar to those found in the moths' eyes. The group claims that the parameters of the structures -- such as period, height and shape -- can be easily controlled.

According to a news item on The European Media Research Center website, the researchers have now formed a spin-off team to exploit and commercialize their idea.

This, however, isn't the first time that such work has been undertaken. In 2007, Vision Systems Design reported on efforts by researchers at the Manufacturing Engineering Centre (MEC) at Cardiff University (Cardiff, UK) to create an industrial lens for use in a low light environment that was also inspired by the eye of the moth.

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