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Open AccessArticle

Dynamic Response of Elastomer-Based Liquid-Filled Variable Focus Lens

by 1,2,* and 2,3
1
Guangdong Institute of Semiconductor Industrial Technology, Guangdong Academy of Sciences, No.363 Changxing Rd., Tianhe, Guangzhou 510-650, China
2
Department of Information Physics and Computing, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
3
Department of Creative Informatics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(21), 4624; https://doi.org/10.3390/s19214624
Received: 20 September 2019 / Revised: 20 October 2019 / Accepted: 23 October 2019 / Published: 24 October 2019
(This article belongs to the Special Issue Feature Issue – Optical Sensors)
Variable focus lenses are capable of dynamically varying their focal lengths. The focal length is varied by adjusting the curvature of the refractive surface and the media on both sides of the lens. The dynamic response is one of the most important criteria to determine the performance of variable focus lens. In this work, we investigated critical factors that affect the dynamic response of liquid-filled variable focus lens with a large aperture size. Based on a theoretical analysis of a circular disk representative of a deformable surface, we found that the dynamic response is significantly influenced by the diameter, thickness, and stiffness of the disk because these factors determine its first natural frequency. We also studied the dynamic response of elastomer-based liquid-filled variable focus lens prototype with different aperture sizes (20 and 30 mm) by using experiments and we found that the lens with the smaller aperture size had an excellent dynamic response. View Full-Text
Keywords: liquid-filled variable focus lens; aperture sizes; dynamic response; natural frequency liquid-filled variable focus lens; aperture sizes; dynamic response; natural frequency
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MDPI and ACS Style

Wang, L.; Ishikawa, M. Dynamic Response of Elastomer-Based Liquid-Filled Variable Focus Lens. Sensors 2019, 19, 4624. https://doi.org/10.3390/s19214624

AMA Style

Wang L, Ishikawa M. Dynamic Response of Elastomer-Based Liquid-Filled Variable Focus Lens. Sensors. 2019; 19(21):4624. https://doi.org/10.3390/s19214624

Chicago/Turabian Style

Wang, Lihui; Ishikawa, Masatoshi. 2019. "Dynamic Response of Elastomer-Based Liquid-Filled Variable Focus Lens" Sensors 19, no. 21: 4624. https://doi.org/10.3390/s19214624

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