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Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator

In this paper, we design, fabricate and characterize a new electromagnetically actuated variable-focus liquid lens which consists of two polymethyl methacrylate (PMMA) substrates, a SU-8 substrate, a polydimethylsiloxane (PDMS) membrane, a permanent magnet and a planar electromagnetic actuator. The...

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Detalles Bibliográficos
Autores principales: Wang, Liang, Duan, Junping, Zhang, Binzhen, Wang, Wanjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6190286/
https://www.ncbi.nlm.nih.gov/pubmed/30404362
http://dx.doi.org/10.3390/mi7100190
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author Wang, Liang
Duan, Junping
Zhang, Binzhen
Wang, Wanjun
author_facet Wang, Liang
Duan, Junping
Zhang, Binzhen
Wang, Wanjun
author_sort Wang, Liang
collection PubMed
description In this paper, we design, fabricate and characterize a new electromagnetically actuated variable-focus liquid lens which consists of two polymethyl methacrylate (PMMA) substrates, a SU-8 substrate, a polydimethylsiloxane (PDMS) membrane, a permanent magnet and a planar electromagnetic actuator. The performance of this liquid lens is tested from four aspects including surface profiling, optical observation, variation of focal length and dynamic response speed. The results shows that with increasing current, the optical chamber PDMS membrane bulges up into a shape with a smaller radius of curvature, and the picture recorded by a charge-coupled device (CCD) camera through the liquid lens also gradually becomes blurred. As the current changes from −1 to 1.2 A, the whole measured focal length of the proposed liquid lens ranges from −133 to −390 mm and from 389 to 61 mm. Then a 0.8 A square-wave current is applied to the electrode, and the actuation time and relaxation time are 340 and 460 ms, respectively. The liquid lens proposed in the paper is easily integrated with microfluidic chips and medical detecting instruments due to its planar structure.
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spelling pubmed-61902862018-11-01 Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator Wang, Liang Duan, Junping Zhang, Binzhen Wang, Wanjun Micromachines (Basel) Article In this paper, we design, fabricate and characterize a new electromagnetically actuated variable-focus liquid lens which consists of two polymethyl methacrylate (PMMA) substrates, a SU-8 substrate, a polydimethylsiloxane (PDMS) membrane, a permanent magnet and a planar electromagnetic actuator. The performance of this liquid lens is tested from four aspects including surface profiling, optical observation, variation of focal length and dynamic response speed. The results shows that with increasing current, the optical chamber PDMS membrane bulges up into a shape with a smaller radius of curvature, and the picture recorded by a charge-coupled device (CCD) camera through the liquid lens also gradually becomes blurred. As the current changes from −1 to 1.2 A, the whole measured focal length of the proposed liquid lens ranges from −133 to −390 mm and from 389 to 61 mm. Then a 0.8 A square-wave current is applied to the electrode, and the actuation time and relaxation time are 340 and 460 ms, respectively. The liquid lens proposed in the paper is easily integrated with microfluidic chips and medical detecting instruments due to its planar structure. MDPI 2016-10-17 /pmc/articles/PMC6190286/ /pubmed/30404362 http://dx.doi.org/10.3390/mi7100190 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Liang
Duan, Junping
Zhang, Binzhen
Wang, Wanjun
Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
title Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
title_full Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
title_fullStr Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
title_full_unstemmed Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
title_short Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
title_sort variable-focus liquid lens integrated with a planar electromagnetic actuator
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6190286/
https://www.ncbi.nlm.nih.gov/pubmed/30404362
http://dx.doi.org/10.3390/mi7100190
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