Varifocal imaging using an ultrasonic optical lens with viscoelastic material

Daisuke Koyama; Ryoichi Isago; Kentaro Nakamura

doi:10.1117/12.966347

17 October 2012 Varifocal imaging using an ultrasonic optical lens with viscoelastic material

Daisuke Koyama, Ryoichi Isago, Kentaro Nakamura

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84212N (2012) https://doi.org/10.1117/12.966347
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

Varifocal imaging using an optical lens that employs acoustic radiation force and a viscoelastic material and that has no mechanical moving parts is investigated. The lens has a simple and thin structure that consists of an annular ultrasonic transducer and silicone gel. An axially symmetric acoustic standing wave can be generated in the gel by exciting a vibration mode in the radial direction on the transducer. The lens profile can be altered by varying the acoustic radiation force of the transducer. The focal length can be controlled by varying the transducer input voltage so that the lens functions as a variable-focus lens.

Citation Download Citation

Daisuke Koyama, Ryoichi Isago, and Kentaro Nakamura "Varifocal imaging using an ultrasonic optical lens with viscoelastic material", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84212N (17 October 2012); https://doi.org/10.1117/12.966347

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