Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2025-02-19 16:00
[Invited Talk] Variable-focus optical lens using ultrasound
Daisuke Koyama (Doshisha Univ.) US2024-82
Abstract (in Japanese) (See Japanese page) 
(in English) In conventional camera modules, adjusting the focal point necessitates controlling the position of optical lenses along the optical axis through mechanical actuators, resulting in an increase in the number of components and the total size of the module. In this report, ultrasonic variable-focus lenses are introduced, which have the capacity to control their focal point through alterations of the lens profile or the refractive index by acoustic radiation force. The report specifically discusses ultrasonic liquid lenses, which utilize a boundary between two liquids with different refractive indices as a lens; ultrasonic gel lenses, which use viscoelastic transparent gel; and ultrasonic liquid crystal lenses, which use liquid crystal materials. The control of the lens profile and the refractive index distribution is achieved through the utilization of resonant vibration modes generated by piezoelectric elements and acoustic radiation force acting on the lens. The focal length of these lenses can be controlled by the driving amplitude, thereby realizing compact variable focus lenses that contain no mechanical moving parts.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical lens / Acoustic radiation force / Flexural vibration / Gel / Liquid crystal / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 375, US2024-82, pp. 63-68, Feb. 2025.
Paper # US2024-82 
Date of Issue 2025-02-12 (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 US2024-82

Conference Information
Committee US  
Conference Date 2025-02-19 - 2025-02-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Tech University (Ookayama Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Acoustic imaging, NDT, Ultrasound in medicine, Ultrasonics, etc. 
Paper Information
Registration To US 
Conference Code 2025-02-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Variable-focus optical lens using ultrasound 
Sub Title (in English)  
Keyword(1) Optical lens  
Keyword(2) Acoustic radiation force  
Keyword(3) Flexural vibration  
Keyword(4) Gel  
Keyword(5) Liquid crystal  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Daisuke Koyama  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name  
2nd Author's Affiliation ()
3rd Author's Name  
3rd Author's Affiliation ()
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2025-02-19 16:00:00 
Presentation Time 40 minutes 
Registration for US 
Paper # US2024-82 
Volume (vol) vol.124 
Number (no) no.375 
Page pp.63-68 
#Pages 6 
Date of Issue 2025-02-12 (US) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan