Tunable metalens offers route to portable medical diagnostics
Sintef lens uses piezoelectric thin film to change focal length.
Source: optics.org
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Researchers Create Tunable Lenses Using Piezoelectric Thin Film and Metasurfaces
For the first time, researchers have created a metasurface lens that uses a piezoelectric thin film to change focal length when a small voltage is applied. Because it is extremely compact and lightweight, the new lens could be useful for portable medical diagnostic instruments, drone-based 3D mapping and other applications where miniaturization can open new possibilities.
Source: azooptics.com