Ultrasonic high-speed variable-focus optical lens

Author

Koyama, Daisuke ; Nakamura, Kentaro

Author_Institution

Fac. of Sci. & Eng, Doshisha Univ., Kyoto, Japan

fYear

2012

fDate

2-5 Oct. 2012

Firstpage

54

Lastpage

55

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics (GCCE), 2012 IEEE 1st Global Conference on

Conference_Location

Tokyo

Print_ISBN

978-1-4673-1500-5

Type

conf

DOI

10.1109/GCCE.2012.6379907

Filename

6379907