Variable-Focus Fluid Lens Using an Electromagnetic Actuator

• Authors: J. Lee , K. Park , J. Choi , H. Kim , S. Kong
• Languages of publication: EN

Abstracts

EN

A variable-focus fluid lens controlled by an electromagnetic actuator and its characteristics are presented in this paper. The repulsive force between an NdFeB magnet and a solenoid through electromagnetic induction causes deflections in the elastomeric membranes integrated in the lens resulting in a focal-length change. The controllability of the focal length of the fabricated lens with an aperture size of 2 mm was approximately from infinity to 15 mm (with input current of 100 mA). The actuator including the solenoid was carefully designed to avoid thermal crosstalk of the lens fluid and magnet from the electromagnetic induction of the solenoid. The settling time to form a convex shape of the lens membrane was approximately 2.5 ms at an input current of 20 mA.

Keywords

EN

85.85.+j; 42.79.Bh

Discipline

• 85.85.+j: Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
• 42.79.Bh: Lenses, prisms and mirrors

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 2
• Pages: 202-204

Dates

published

2013-02

Contributors

author

J. Lee

• Graduate School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, Korea

author

K. Park

• Graduate School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, Korea

author

J. Choi

• Graduate School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, Korea

author

H. Kim

• Graduate School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, Korea
• School of Electronics Engineering, Kyungpook National University, Daegu, Korea

author

S. Kong

• Graduate School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, Korea
• School of Electronics Engineering, Kyungpook National University, Daegu, Korea

References

• [1] C. Cavallotti, M. Piccigallo, E. Susilo, P. Valdastri, A. Menciassi, Paolo Dario, Sens. Actuators A 156, 72 (2009)
• [2] B. Hendriks, S. Kuiper, IEEE Spectrum 41, 32 (2004)
• [3] J.K. Lee, K.-W. Park, H.-R. Kim, S.H. Kong, Jpn. J. Appl. Phys. 49, 06GN11 (2010)
• [4] K. Asatryan, T. Galstian, A. Bagramyan, V. Presniakov, A. Tork, A. Zohrabyan, P.P. Clark, U.S. Patent Appl. No. 12/996,593, 21 April 2011
• [5] M. Maillard, J. Legrand, B. Berge, Langmuir 25, 6162 (2009)
• [6] www.tessera.com
• [7] B. Berge, Nikkei Electron. 911, 129 (2005)
• [8] H. Oku, M. Ishikawa, Appl. Phys. Lett. 94, 221108 (2009)
• [9] D.Y. Zhang, V. Lien, Y. Berdichevsky, J. Choi, Y.H. Lo, Appl. Phys. Lett. 82, 3171 (2003)
• [10] S.W. Lee, S.S. Lee, Appl. Phys. Lett. 90, 121129 (2007)
• [11] www.samsung.com
• [12] www.varioptic.com
• [13] www.lensvector.com
• [14] F. Schneider, J. Draheim, C. Muller, U. Wallrabe, Sens. Actuators A 154, 316 (2009)
• [15] W. Zhang, K. Aljasem, H. Zappe, A. Seifert, Opt. Expr. 19, 2347 (2011)

Identifiers

DOI

10.12693/APhysPolA.123.202