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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 10 — May. 11, 2009
  • pp: 8152–8164

Biomimetic variable-focus lens system controlled by winding-type SMA actuator

Jong-Moon Choi, Hyung-Min Son, and Yun-Jung Lee  »View Author Affiliations

Optics Express, Vol. 17, Issue 10, pp. 8152-8164 (2009)

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Inspired by the biomechanics of the human eye, which includes a crystalline lens, ciliary muscles, and zonular fibers, the proposed variable-focus lens system consists of a PDMS lens, winding-type SMA actuator, and load arms. The PDMS lens is encircled and stretched by the load arms joined to an outer ring that is rotated by the winding-type SMA actuator, thereby changing the focal length of the lens. In contrast to other single tunable-focus lenses, the proposed system uses a gel-type PDMS lens, which is insensitive to gravity and external vibration, and can be made into a biconvex or aspheric shape. The design of the proposed system is described in detail, and experimental results demonstrate the validity of the proposed system.

© 2009 Optical Society of America

OCIS Codes
(220.3620) Optical design and fabrication : Lens system design
(220.4880) Optical design and fabrication : Optomechanics
(110.1080) Imaging systems : Active or adaptive optics

ToC Category:
Optical Design and Fabrication

Original Manuscript: March 30, 2009
Revised Manuscript: April 27, 2009
Manuscript Accepted: April 27, 2009
Published: April 29, 2009

Virtual Issues
Vol. 4, Iss. 7 Virtual Journal for Biomedical Optics

Jong-Moon Choi, Hyung-Min Son, and Yun-Jung Lee, "Biomimetic variable-focus lens system controlled by winding-type SMA actuator," Opt. Express 17, 8152-8164 (2009)

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