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Circular dielectric liquid iris

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Abstract

We demonstrate a liquid iris diaphragm using dielectric force, enabling its aperture to vary from 4mm at the resting state to 1.5mm at 160Vrms. The liquid iris is a packaged optical component comprised of transparent oil, opaque ink, and a set of driving electrodes on a glass substrate. The iris aperture shrinks with the dielectric force, which is exerted on the interface between the two nonconductive liquids. The transmittance was measured to exceed 85% with no antireflection coatings over the spectrum of visible light. The maximum electric power consumed is measured to be 5.7mW.

© 2010 Optical Society of America

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