Tunable Focus Liquid Lens with Radial-Patterned Electrode

A dielectric liquid lens is prepared based on our previous work. By optimizing the device structure, the liquid lens presents a converging focus with good resolution and changes its focal length over a broad range with a low driving voltage. For a liquid lens with ~2.3 mm diameter in the relaxed sta...

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Bibliographic Details
Published in:Micromachines (Basel) 2015-08, Vol.6 (8), p.1157-1165
Main Authors: Xu, Miao, Wang, Xiahui, Ren, Hongwen
Format: Article
Language:English
Subjects:
adaptive optics
Devices
dielectrophoresis
Electric potential
Electrodes
focal length
imaging
Lenses
liquid lens
Liquids
Optimization
Optoelectronic devices
Voltage
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Summary:A dielectric liquid lens is prepared based on our previous work. By optimizing the device structure, the liquid lens presents a converging focus with good resolution and changes its focal length over a broad range with a low driving voltage. For a liquid lens with ~2.3 mm diameter in the relaxed state, it can resolve ~40 lp/mm. The resolution does not degrade during focus change. Its focal length can be varied from ~12 to ~5 mm when the applied voltage is changed from 0 to 28 Vrms. The response time of one cycle is ~2.5 s. Our liquid lens, with a low driving voltage for a large dynamic range, has potential applications in imaging, biometrics, optoelectronic, and lab-on-chip devices.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi6081157