Title :
Ultrasonic high-speed variable-focus optical lens
Author :
Koyama, Daisuke ; Nakamura, Kentaro
Author_Institution :
Fac. of Sci. & Eng, Doshisha Univ., Kyoto, Japan
Abstract :
A high-speed variable-focus liquid optical lens using acoustic radiation force is proposed. The lens consists of a piezoelectric ring and a lens cell 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 ultrasonic transducer, allowing the liquid lens to be operated as a variable-focus lens. The fastest response time of 6.7 ms was obtained with silicone oil with a kinematic viscosity of 100 cSt. The lens could scan at focal lengths of from 7.0 to 14.5 mm at 1 kHz in the axial direction.
Keywords :
lenses; optical self-focusing; silicones; ultrasonic transducers; viscosity; acoustic radiation force; degassed water; frequency 1 kHz; high-speed variable-focus optical lens; kinematic viscosity; lens cell; liquid optical lens; oil-water interface; piezoelectric ring; silicone oil; time 6.7 ms; ultrasonic optical lens; ultrasonic transducer; Acoustics; Force; Kinematics; Lenses; Liquids; Time factors; Viscosity; confocal image; liquid lens; variable-focus lens;
Conference_Titel :
Consumer Electronics (GCCE), 2012 IEEE 1st Global Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4673-1500-5
DOI :
10.1109/GCCE.2012.6379907
