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| Presentation | 2018-01-23 13:00 [Poster Presentation] Focus control of a liquid crystal lens using ultrasound Yuki Shimizu, Daisuke Koyama, Marina Fukui, Akira Emoto (Doshisha Univ.), Kentaro Nakamura (Tokyo Tech.), Mami Matsukawa (Doshisha Univ.)  US2017-85 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Nematic liquid crystals are widely used in optical devices such as liquid crystal displays. In this report, we propose a novel technique to control the orientation of nematic liquid crystals using ultrasound, and the variable-focus liquid crystal lens was developed by applying this technique. The ultrasonic liquid crystal lens was fabricated; a liquid crystal layer with the thickness of 50 um was sandwiched between two circular glass plates having an annular PZT transducer. By exciting the transducer, the flexural vibration modes were generated on the liquid crystal cell. The acoustic radiation force to the liquid crystal layer was generated, and the molecular orientation changed, resulting the drastic changes of the light transmission. The change of refractive index in the lens gives the variable-focus function. The distribution of the molecular orientation in the liquid crystal was predicted from the transmitted light intensities under the Crossed-Nicol condition, and the molecular orientation flowed out from the anti-nodal positions of the resonance flexural vibration of the glass plate. The focal point could be controlled by the applied voltage amplitude and the lens functioned as a variable-focus lens. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Nematic liquid crystal / control of molecular orientation / acoustic radiation force / liquid crystal lens / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 398, US2017-85, pp. 17-21, Jan. 2018. | |
| Paper # | US2017-85 | |
| Date of Issue | 2018-01-16 (US) | |
| ISSN | Print edition: ISSN 0913-5685 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 | US2017-85 |
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| Conference Information | |
| Committee | US EA |
| Conference Date | 2018-01-23 - 2018-01-24 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2018-01-US-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Focus control of a liquid crystal lens using ultrasound |
| Sub Title (in English) | |
| Keyword(1) | Nematic liquid crystal |
| Keyword(2) | control of molecular orientation |
| Keyword(3) | acoustic radiation force |
| Keyword(4) | liquid crystal lens |
| Keyword(5) | |
| Keyword(6) | |
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| 1st Author's Name | Yuki Shimizu |
| 1st Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 2nd Author's Name | Daisuke Koyama |
| 2nd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 3rd Author's Name | Marina Fukui |
| 3rd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 4th Author's Name | Akira Emoto |
| 4th Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 5th Author's Name | Kentaro Nakamura |
| 5th Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech.) |
| 6th Author's Name | Mami Matsukawa |
| 6th Author's Affiliation | Doshisha University (Doshisha Univ.) |
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| Speaker | Author-1 |
| Date Time | 2018-01-23 13:00:00 |
| Presentation Time | 120 minutes |
| Registration for | US |
| Paper # | US2017-85 |
| Volume (vol) | vol.117 |
| Number (no) | no.398 |
| Page | pp.17-21 |
| #Pages | 5 |
| Date of Issue | 2018-01-16 (US) |
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