Tunable Metalens Can Change Its Focus In Real Time, Like A Human Eye

Researchers have demonstrated electrically tunable large-area metalenses controlled by artificial muscle technology. The adaptive metalens simultaneously controls for three of the major contributors to blurry images: focus, astigmatism and image shift. The device thickness is only 30 μm.

To create the tunable metalens, researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) first needed to scale-up existing metalens structures. Current metalenses focus light through a dense pattern of nanostructures, each smaller than a wavelength.

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