期刊
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
卷 21, 期 4, 页码 953-958出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JMEMS.2012.2194777
关键词
Adaptive lens; changing aperture; focal length; liquid; resolution
类别
资金
- National Research Foundation of Korea [2012-0004814, 2010-0021680]
- National Research Foundation of Korea [2012-0004814, 2010-0021680] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A tunable-focus liquid lens using an iris diaphragm is demonstrated. In the central opening area, two immiscible liquids with different refractive indices meet, resulting in a curved shape with a contact angle on the blade surface of the diaphragm. The liquids with a curved shape exhibit a lens character. By changing the aperture of the diaphragm, the shape of the liquid is changed accordingly which, in turn, leads to tunable focal length. Based on this operation approach, the focal length (f) of our lens could be tuned in the range of 13 <= f <= 105 cm when its aperture is changed from 1.3 to 3.2 mm. At f = 105 cm, the resolution of our lens can resolve over 45 line pairs per millimeter at room temperature. Our liquid lens, by changing aperture size, has the advantages of compact structure, easy operation, large optical power, and multistability.
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