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Liquid Lens Module with Wide Field-of-View and Variable Focal Length

Authors
Seo, Sang WonHan, SeungohSeo, Jun HoChoi, Woo BumSung, Man Young
Issue Date
12월-2010
Publisher
KOREAN INST METALS MATERIALS
Keywords
MEMS; liquid lens; wide angle; variable focus; capsule endoscope
Citation
ELECTRONIC MATERIALS LETTERS, v.6, no.4, pp.141 - 144
Indexed
SCIE
SCOPUS
KCI
OTHER
Journal Title
ELECTRONIC MATERIALS LETTERS
Volume
6
Number
4
Start Page
141
End Page
144
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/115218
DOI
10.3365/eml.2010.12.141
ISSN
1738-8090
Abstract
A novel wide angle and variable-focus imaging module based on a miniaturized liquid lens is presented for capsule endoscopy applications. For these applications, it is desirable to have features such as a wide field of view (FOV), variable focus, small size, and low power consumption, thereby taking full advantage of the miniaturized liquid lens. The proposed imaging module has three aspheric plastic lenses for a wide FOV, and one liquid lens that can change the focal length by as much as 24.5 cm with a bias voltage difference of 23 V-nns for variable focusing. The assembled lens module has an overall length of 8.4 mm and a FOV of 120.5 degrees. The realized imaging module including the proposed lenses is small enough to be inserted into a capsule endoscope, and it is expected to improve the diagnostic capability of capsule endoscopes.
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