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Axisymmetrical resonance modes in an electrowetting optical lens
Eduardo J Miscles1, Wei Yang Lim1, Omkar D Supekar
1Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
Applied Physics Letters
|May 22, 2023
Summary
Low-frequency vibrations can disrupt electrowetting adaptive optics. Density-matched liquids in electrowetting lenses mitigate vibration effects, enhancing optical system stability.
Area of Science:
- Optics
- Fluid Dynamics
- Mechanical Engineering
Background:
- Electrowetting adaptive optics are crucial for microscopy and LIDAR.
- The influence of low-frequency mechanical vibration on these systems is not well understood.
Purpose of the Study:
- To model and experimentally investigate vibration-induced resonance modes in electrowetting devices.
- To evaluate the effectiveness of density-matched liquids in mitigating vibration effects.
Main Methods:
- Developed a theoretical model for predicting liquid interface resonance modes.
- Employed numerical simulations and experimental contact angle modulation.
- Tested electrowetting lenses with density-mismatched and density-matched liquids under axial vibration.
Main Results:
- Experimental resonance frequencies align with theoretical predictions (zero-order Bessel functions).
- Density-mismatched liquids exhibit observable Bessel modes under vibration.
- Density-matched liquids demonstrate robustness against axial vibration.
Conclusions:
- External vibration induces predictable Bessel modes on liquid interfaces in electrowetting devices.
- Electrowetting lenses utilizing density-matched liquids offer a viable solution for vibration mitigation in optical systems.
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