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Paper Abstract and Keywords
Presentation 2024-12-20 13:45
[Poster Presentation] Rotational flow generated by the traveling wave of a cylinder and its application to optical devices.
Risako Tomita, Aoba Iwa, Daisuke Koyama (Doshisha Univ.) US2024-60
Abstract (in Japanese) (See Japanese page) 
(in English) In the current electronic device market, where compact and lightweight designs are highly desired, the miniaturization of camera modules remains a significant challenge. Conventional optical lenses achieve focus adjustment by moving solid lenses along the optical axis, which requires multiple lenses and mechanical moving parts. However, such structures hinder the overall miniaturization of the modules. In this report, we proposed a novel optical lens that enable focal control by generating swirling flow in liquid via ultrasonic traveling waves, which deforms the liquid surface into a concave shape. The lens consists of an annular piezoelectric ultrasound transducer, an aluminum cylinder, and an inner liquid. It was observed that the flexural traveling wave of the cylinder in the circumferential direction induced a swirling flow, which resulted in the concave lens function. The transmitted light intensity distribution varied with changes in the applied voltage to the transducer, suggesting the existence of an optimal range of applied voltages for lens shape control.
Keyword (in Japanese) (See Japanese page) 
(in English) Ultrasound / flexural traveling wave / variable focus optical lens / / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 317, US2024-60, pp. 6-9, Dec. 2024.
Paper # US2024-60 
Date of Issue 2024-12-13 (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 US2024-60

Conference Information
Committee EA US  
Conference Date 2024-12-20 - 2024-12-21 
Place (in Japanese) (See Japanese page) 
Place (in English) OITAUniv 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonics, etc. 
Paper Information
Registration To US 
Conference Code 2024-12-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Rotational flow generated by the traveling wave of a cylinder and its application to optical devices. 
Sub Title (in English)  
Keyword(1) Ultrasound  
Keyword(2) flexural traveling wave  
Keyword(3) variable focus optical lens  
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1st Author's Name Risako Tomita  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Aoba Iwa  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Daisuke Koyama  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2024-12-20 13:45:00 
Presentation Time 120 minutes 
Registration for US 
Paper # US2024-60 
Volume (vol) vol.124 
Number (no) no.317 
Page pp.6-9 
#Pages 4 
Date of Issue 2024-12-13 (US) 

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