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Related Experiment Video

Updated: Jun 10, 2026

Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light

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Published on: August 17, 2017

Circular dielectric liquid iris.

C Gary Tsai¹, J Andrew Yeh

¹Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Hsinchu, Taiwan.

|July 17, 2010

Summary

This summary is machine-generated.

Researchers developed a novel liquid iris diaphragm using dielectric force. This optical component can adjust its aperture from 4 mm to 1.5 mm, offering a new solution for optical systems.

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Area of Science:

Optics and Photonics
Materials Science
Electrical Engineering

Background:

Traditional mechanical iris diaphragms can be bulky and complex.
There is a need for compact, electronically controlled optical aperture solutions.

Purpose of the Study:

To demonstrate a liquid iris diaphragm actuated by dielectric force.
To characterize the performance of this novel optical component.

Main Methods:

Fabrication of a packaged optical component with transparent oil and opaque ink.
Integration of driving electrodes on a glass substrate to generate dielectric force.
Measurement of aperture size variation and optical transmittance.

Main Results:

The liquid iris aperture varied from 4 mm (resting state) to 1.5 mm at 160 V(rms).
Optical transmittance exceeded 85% across the visible spectrum without antireflection coatings.
Maximum electrical power consumption was measured at 5.7 mW.

Conclusions:

Dielectric force effectively controls the aperture size of the liquid iris.
The liquid iris diaphragm is a viable, low-power optical component for variable aperture applications.
This technology offers a compact and efficient alternative to mechanical irises.