Compact, high-speed variable-focus liquid lens using acoustic radiation force

被引：53
作者：
Koyama, Daisuke [1 ]
Isago, Ryoichi [1 ]
Nakamura, Kentaro [1 ]
机构：
[1] Tokyo Inst Technol, Precis & Intelligence Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 24期
基金：
日本科学技术振兴机构;
关键词：
NONCONTACT ULTRASONIC TRANSPORTATION; PARTIAL CONTACT; FREE-VIBRATIONS; SMALL OBJECTS; AIR; PRESSURE; SUPPORT; DROP;
D O I：
10.1364/OE.18.025158
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A compact, high-speed variable-focus liquid lens using acoustic radiation force is proposed. The lens consists of an annular piezoelectric ultrasound transducer and an aluminum cell (height: 3 mm; diameter: 6 mm) filled with degassed water and silicone oil. The profile of the oil-water interface can be rapidly varied by applying acoustic radiation force from the transducer, allowing the liquid lens to be operated as a variable-focus lens. A theoretical model based on a spring-mass-dashpot model is proposed for the vibration of the lens. The sound pressure distribution in the lens was calculated by finite element analysis and it suggests that an acoustic standing wave is generated in the lens. The fastest response time of 6.7 ms was obtained with silicone oil with a kinematic viscosity of 100 cSt. (C) 2010 Optical Society of America
引用
收藏
页码：25158 / 25169
页数：12
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