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Related Experiment Video

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Fabrication Process of Silicone-based Dielectric Elastomer Actuators

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Published on: February 1, 2016

A Robust Soft Lens for Tunable Camera Application Using Dielectric Elastomer Actuators.

Saekwang Nam^1,2, Sungryul Yun¹, Jae Woong Yoon¹

¹Smart UI/UX Device Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon, South Korea.

|August 30, 2018

Summary

This study presents an expansion-tunable soft lens using a dielectric elastomer actuator (DEA) for dynamic focus adjustment. The novel lens achieves a significant focal length change, offering potential for advanced vision systems.

Keywords:

actuator lens mimic tunable

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Area of Science:

Optics and Photonics
Materials Science
Biomimetics

Background:

Tunable lenses are crucial for dynamic focus adjustment in optical systems.
Expansion-based mechanisms offer greater focal length tuning range compared to contraction-based ones.
Biological eye accommodation provides inspiration for advanced lens designs.

Purpose of the Study:

To develop an expansion-tunable soft lens module utilizing a disk-type dielectric elastomer actuator (DEA).
To mimic biological accommodation for efficient and reliable focal length adjustment.
To demonstrate the potential of this tunable lens for compact vision components.

Main Methods:

Fabrication of a soft lens integrated with a disk-type dielectric elastomer actuator (DEA) pair.
Application of axially symmetric pulling forces via DEA to stretch the soft lens.
Control of focal length by dynamic driving voltage signal to the DEA.

Main Results:

A 3mm diameter soft lens achieved a 65.7% focal length change (14.3-23.7 mm).
A quadratic relationship between lens expansion and focal length was confirmed.
The tunable lens module demonstrated high reliability and tunability.

Conclusions:

The proposed expansion-tunable soft lens module offers significant focal length tunability.
The biomimetic design ensures efficient and reliable dynamic focus adjustment.
This technology is suitable for developing lightweight, compact vision components for robotics and autonomous systems.