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Updated: Apr 16, 2026

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

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Published on: October 1, 2007

Electrically actuated liquid iris.

Miao Xu, Hongwen Ren, Yi-Hsin Lin

|February 28, 2015

Summary

This summary is machine-generated.

We developed an adaptive iris using dielectric liquids and a radial-interdigitated electrode. This novel optical switch can adjust its aperture size, offering potential in various electronic and optical applications.

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Fabrication Process of Silicone-based Dielectric Elastomer Actuators

Fabrication Process of Silicone-based Dielectric Elastomer Actuators

Published on: February 1, 2016

Area of Science:

Optoelectronics
Materials Science

Background:

Traditional irises often lack adaptability and can be bulky.
The need for compact, responsive optical aperture control is growing in fields like wearable technology.

Purpose of the Study:

To develop a novel adaptive iris utilizing dielectric liquids.
To demonstrate voltage-controlled aperture modulation with a radial-interdigitated electrode.

Main Methods:

Confining a black dielectric liquid within a circular gasket surrounded by an immiscible liquid.
Applying voltage to a radial-interdigitated electrode to generate dielectric forces and alter the liquid's surface tension.
Measuring aperture size changes from 4.7 mm to 1.2 mm with applied voltage (0-70 Vrms).

Main Results:

Achieved a tunable aperture with an aperture ratio of approximately 94%.
Demonstrated effective and reasonably fast switching of the iris aperture size.
Confirmed the optical switch is polarization-insensitive.

Conclusions:

The dielectric liquid adaptive iris offers a promising solution for dynamic aperture control.
Potential applications include light shutters, optical attenuators, biomimicry, and wearable devices.