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Paper Abstract and Keywords
Presentation 2023-06-16 13:00
Ultrasound liquid lens using a viscoelastic gel film and acoustic radiation force
Haruto Miki, Yuki Harada, Kosuke Nakamura, Mami Matsukawa, Daisuke Koyama (Doshisha Univ.) US2023-9
Abstract (in Japanese) (See Japanese page) 
(in English) Conventional camera modules have mechanical moving parts and change its focal length by moving the lens position along the optical axis, and this moving mechanism causes an increase in the volume of camera devices. In this report, we proposed optical variable-focus liquid lenses using a viscoelastic gel film and acoustic radiation force to improve its response speed and robustness. By applying an input voltage to the liquid lens, the surface profile of the gel film was changed by the acoustic radiation force generated by the flexural vibration. The vibrational distribution on the lens was measured using a laser Doppler vibrometer, and the deformation of the gel surface (lens surface) was measured using a laser displacement meter. The deformational displacement was increased with the voltage amplitude, meaning the curvature of the lens and its focal length can be controlled by the voltage amplitude. The response time of the lens was dependent on the thickness of the gel film on the lens surface, and a thinner film thickness gave a shorter response time.
Keyword (in Japanese) (See Japanese page) 
(in English) Varifocal Optical Lens / Ultrasound / Acoustic Radiation Force / Silicone Gel / Flexural Vibration / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 83, US2023-9, pp. 1-4, June 2023.
Paper # US2023-9 
Date of Issue 2023-06-09 (US) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF US2023-9

Conference Information
Committee US  
Conference Date 2023-06-16 - 2023-06-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Muromachi Campus, Doshisha University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Ultrasound in medicine, Acoustic imaging, Ultrasonics, etc. 
Paper Information
Registration To US 
Conference Code 2023-06-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Ultrasound liquid lens using a viscoelastic gel film and acoustic radiation force 
Sub Title (in English)  
Keyword(1) Varifocal Optical Lens  
Keyword(2) Ultrasound  
Keyword(3) Acoustic Radiation Force  
Keyword(4) Silicone Gel  
Keyword(5) Flexural Vibration  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Haruto Miki  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Yuki Harada  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Kosuke Nakamura  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Mami Matsukawa  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
5th Author's Name Daisuke Koyama  
5th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2023-06-16 13:00:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2023-9 
Volume (vol) vol.123 
Number (no) no.83 
Page pp.1-4 
#Pages 4 
Date of Issue 2023-06-09 (US) 

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