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Proceedings Paper

MEMS-based liquid lens for capsule endoscope
Author(s): S. W. Seo; S. Han; J. H. Seo; Y. M. Kim; M. S. Kang; N. G. Min; W. B. Choi; M. Y. Sung
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Paper Abstract

The capsule endoscope, a new application area of digital imaging, is growing rapidly but needs the versatile imaging capabilities such as auto-focusing and zoom-in to be an active diagnostic tool. The liquid lens based on MEMS technology can be a strong candidate because it is able to be small enough. In this paper, a cylinder-type liquid lens was designed based on Young-Lippmann model and then fabricated with MEMS technology combining the silicon thin-film process and the wafer bonding process. The focal length of the lens module including the fabricated liquid lens was changed reproducibly as a function of the applied voltage. With the change of 30V in the applied bias, the focal length of the constructed lens module could be tuned in the range of about 42cm. The fabricated liquid lens was also proven to be small enough to be adopted in the capsule endoscope, which means the liquid lens can be utilized for the imaging capability improvement of the capsule endoscope.

Paper Details

Date Published: 26 March 2008
PDF: 6 pages
Proc. SPIE 6931, Nanosensors and Microsensors for Bio-Systems 2008, 69310N (26 March 2008); doi: 10.1117/12.785856
Show Author Affiliations
S. W. Seo, BNP Science Co., Ltd. (South Korea)
Korea Univ. (South Korea)
S. Han, Hoseo Univ. (South Korea)
J. H. Seo, Korea Univ. (South Korea)
Y. M. Kim, Korea Univ. (South Korea)
M. S. Kang, Korea Univ. (South Korea)
N. G. Min, Korea Univ. (South Korea)
W. B. Choi, BNP Science Co., Ltd. (South Korea)
M. Y. Sung, Korea Univ. (South Korea)

Published in SPIE Proceedings Vol. 6931:
Nanosensors and Microsensors for Bio-Systems 2008
Vijay K. Varadan, Editor(s)

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