Tunable lens using dielectric elastomer sandwiched by transparent conductive liquid

Abstract

We propose and demonstrate a compact tunable lens with high transmittance using a dielectric elastomer sandwiched by transparent conductive liquid. The transparent conductive liquid not only serves as the refractive material of the tunable lens but also works as the compliant electrode of the dielectric elastomer. The overall dimensions of the proposed tunable lens are 16 mm in diameter and 10 mm in height, and the optical transmittance is as high as 92.2% at 380–760 nm. The focal power variation of the tunable lens is − 23.71 D at an actuation voltage of 3.0 kV. The rise and fall times are 60 ms and 185 ms, respectively. The fabrication process of the tunable lens is free of the deposition of opaque compliant electrodes. Such a tunable lens promises a potential solution in various compact imaging systems.

Non-aqueous organic solution based on a large-aperture spherical electrowetting liquid lens with a wide tunable focal length range

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“…In 2021, Cheng et al designed a liquid lens with two cavities separated by a dielectric elastomer membrane. [158] The conductive liquid filled in the cavity was used not only as the refraction material of the lens but also as the flexible electrode of the dielectric elastomer, which could obtain good light transmittance and a large focusing range of 42.18 mm.…”

Spray-Printing and Spin Methods to Fabricate Multilayered Dielectric Elastomer Actuators Embedded with Liquid Metal Electrodes

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