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Thin Film Allows Metasurface Lens to Change Focus

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A research team headed by Christopher Dirdal from SINTEF Smart Sensors and Microsystems in Norway has 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 lens could be useful for portable medical diagnostic instruments, drone-based 3D mapping, and other applications bolstered by the miniaturization of components. “This type of low-power, ultracompact varifocal lens could be used in a wide range of sensor and imaging technologies where system size, weight, and...Read full article

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