Tunable-focus liquid lens system controlled by antagonistic winding-type SMA actuator

doi:10.1364/OE.17.014339

Optics Express

Editor: C. Martijn de Sterke
Vol. 17, Iss. 16 — Aug. 3, 2009
pp: 14339–14350

Tunable-focus liquid lens system controlled by antagonistic winding-type SMA actuator

Hyung-Min Son, Min Young Kim, and Yun-Jung Lee »View Author Affiliations

Optics Express, Vol. 17, Issue 16, pp. 14339-14350 (2009)
http://dx.doi.org/10.1364/OE.17.014339

View Full Text Article

Enhanced HTML Acrobat PDF (934 KB)

Journal Search
Article Lookup

Article Tools

Share

Citations

Alert me when this article is cited
Export Citation/Save

Abstract
Article Info
References (10)
Cited By
Figures (16)
Metrics
Related Content

Abstract

A new tunable-focus liquid lens system is proposed that consists of a liquid-filled PDMS (polydimethylsiloxane) membrane, special liquid injection mechanism based on a cam structure, antagonistic winding-type SMA(shape memory alloys) actuator for changing the surface curvature of the membrane, and liquid injection control system, including a digital signal processing board and actuator driver board. The focal length of the liquid lens is adjusted by changing the radius of the curvature of the liquid lens through redistributing the liquid using an injection mechanism. In the case of liquid lens systems using conventional injection mechanisms, the nonlinear relationship between the focal length change and the actuator displacement makes it difficult to control the focal length of the lens system, as there is only a narrow control range for adjusting the focal length over a wide range. In addition, miniaturization of the lens system is difficult due to the requirement of bulky and heavy actuators, such as an electrical motor and pump[7]. Thus, a relatively light and small SMA actuator is proposed for a compact lens system. This paper then provides a detailed description of the proposed tunable-focus liquid lens system, and an experimental system is also implemented. Finally, the focusing performance of the proposed liquid lens system is analyzed, and its usefulness and effectiveness verified through a series of experiments.

OCIS Codes
(220.3620) Optical design and fabrication : Lens system design
(310.0310) Thin films : Thin films
(110.1080) Imaging systems : Active or adaptive optics

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: June 2, 2009
Revised Manuscript: July 20, 2009
Manuscript Accepted: July 20, 2009
Published: July 31, 2009

Citation
Hyung-Min Son, Min Young Kim, and Yun-Jung Lee, "Tunable-focus liquid lens system controlled by antagonistic winding-type SMA actuator," Opt. Express 17, 14339-14350 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-14339

Sort: Author | Year | Journal | Reset

References

H. Ren and S. T. Wu, "Variable-focus liquid lens," Opt. Express 15, 5931-5936 (2007). [CrossRef] [PubMed]
H. Ren, S. T. Wu, "Variable-focus liquid lens by changing aperture," Appl. Phys. Lett. 88, 21107 (2005).
H. Ren, D. Fox, P. Anderson, B. Wu, and S. T. Wu, "Tunable-focus liquid lens controlled using a servo motor," Opt. Express 14, 8031-8036 (2006). [CrossRef] [PubMed]
H. Ynag, C. Y. Yang, and M. S. Yeh, "Fabrication of miniature variable-focus using liquid technique," DTIP of Mens and Moems, Streas, Italy, Apr. (2007).
J. M, Choi, H. M. Son, and Y. J. Lee, "Design of biomimetic robot-eye system with single vari-focal lens and winding-type SMA actuator," International Conference on Control, Automation and Systems 2008, 1173-1177, Seoul, Korea, (2008).
S. Kuipper and B. W. Hendriks, "Variable-focus liquid for miniature camera," Appl. Phys. Lett. 85, 1128-1130, Aug. (2004). [CrossRef]
G. C. Knollman, J. J, S. Bellind, and J. L. Weaver, "Variable-focus liquid-filled hydroacoustic lens," J. Acous. Am. 49, 253-261, (1970). [CrossRef]
D. Reynaerts and H. V. Brussel, "Design aspects of shape memory actuators," Mechatronics, 635-656, (1998).
Y. J. Lee, H. M. Son, J. G. Gu, and T. H. Nam, "Design and control of a multistep SMA actuator," Int. J. Appl. Electromag. Mech. 23, 119-124, (2006).
H. M. Son, J. B. Gu, T. H. Nam, and Y. J. Lee, "Dynamic gait of a quadruped robot with SMA actuator," SICE-ICASE International Joint Conference 2006, Busan, Korea, Oct. (2006). [CrossRef]

Appl. Phys. Lett.

H. Ren, S. T. Wu, "Variable-focus liquid lens by changing aperture," Appl. Phys. Lett. 88, 21107 (2005).

Int. J. Appl. Electromag. Mech.

Y. J. Lee, H. M. Son, J. G. Gu, and T. H. Nam, "Design and control of a multistep SMA actuator," Int. J. Appl. Electromag. Mech. 23, 119-124, (2006).

J. Acous. Am.

G. C. Knollman, J. J, S. Bellind, and J. L. Weaver, "Variable-focus liquid-filled hydroacoustic lens," J. Acous. Am. 49, 253-261, (1970). [CrossRef]

Mechatronics

D. Reynaerts and H. V. Brussel, "Design aspects of shape memory actuators," Mechatronics, 635-656, (1998).

Opt. Express

Other

H. Ynag, C. Y. Yang, and M. S. Yeh, "Fabrication of miniature variable-focus using liquid technique," DTIP of Mens and Moems, Streas, Italy, Apr. (2007).
J. M, Choi, H. M. Son, and Y. J. Lee, "Design of biomimetic robot-eye system with single vari-focal lens and winding-type SMA actuator," International Conference on Control, Automation and Systems 2008, 1173-1177, Seoul, Korea, (2008).
S. Kuipper and B. W. Hendriks, "Variable-focus liquid for miniature camera," Appl. Phys. Lett. 85, 1128-1130, Aug. (2004). [CrossRef]
H. M. Son, J. B. Gu, T. H. Nam, and Y. J. Lee, "Dynamic gait of a quadruped robot with SMA actuator," SICE-ICASE International Joint Conference 2006, Busan, Korea, Oct. (2006). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Click here to see a list of articles that cite this paper

Figures


Fig. 1.	Fig. 2.	Fig. 3.


Fig. 4.	Fig. 5.	Fig. 6.


Fig. 7.	Fig. 8.	Fig. 9.


Fig. 10.	Fig. 11.	Fig. 12.


Fig. 13.	Fig. 14.	Fig. 15.


Fig. 16.