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Electrically actuated liquid iris
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DOI：10.1364/OL.40.000831.png)
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We report an adaptive iris using dielectric liquids and a radial-interdigitated electrode. A black liquid is confined by a circular gasket with a donut shape. The surrounding of the black liquid is filled with an immiscible liquid. In the relaxing state, the black liquid obtains the largest clear aperture. By applying a voltage, the surface of the black liquid is stretched by the generated dielectric force, resulting in a reduction of its aperture. For the demonstrated iris, the diameter of the aperture can be changed from similar to 4.7 mm to similar to 1.2 mm when the voltage is applied from 0 to 70 V-rms. The aperture ratio is similar to 94%. Owing to the radial-interdigitated electrode, the aperture size of the iris can be effectively switched with a reasonably fast response time. The optical switch is polarization-insensitive. The potential applications of our iris are light shutters, optical attenuators, biomimicry, and wearable devices. (C) 2015 Optical Society of America
Keyword:
OPTICAL SWITCH
VARIABLE APERTURE
TUNABLE APERTURE
DROPLET
LENS
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3.3
论文数:
4.0W
被引数:
7.6W
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