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Ultrasound sensing using the acousto-optic effect in polymer dispersed liquid crystals
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Trushkevych, Oksana, Eriksson, Tobias J. R., Ramadas, Sivaram Nishal, Dixon, Steve M. and Edwards, R. S. (Rachel S.) (2015) Ultrasound sensing using the acousto-optic effect in polymer dispersed liquid crystals. Applied physics letters, 107 (5). 054102 . doi:10.1063/1.4928390
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Official URL: http://dx.doi.org/10.1063/1.4928390
Abstract
Acousto-optic effects are demonstrated in polymer dispersed liquid crystal (PDLC) films, showing promise for applications in ultrasound sensing. The PDLC films are used to image two displacement profiles of an air-coupled flexural transducers resonant modes at 295 kHz and 730 kHz. Results are confirmed using laser vibrometry. The regions on the transducers with the largest displacements are clearly imaged by the PDLC films, with the resolution agreeing well with laser vibrometry scanning. Imaging takes significantly less time than a scanning system (switching time of a few seconds, as compared to 8 hours for laser vibrometry). Heating effects are carefully monitored using thermal imaging, and are found not to be the main cause of PDLC clearing.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Polymer liquid crystals, Acoustooptics, Ultrasonic imaging | ||||||||
| Journal or Publication Title: | Applied physics letters | ||||||||
| Publisher: | American Institute of Physics | ||||||||
| ISSN: | 0003-6951 | ||||||||
| Official Date: | 6 August 2015 | ||||||||
| Dates: |
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| Volume: | 107 | ||||||||
| Number: | 5 | ||||||||
| Article Number: | 054102 | ||||||||
| DOI: | 10.1063/1.4928390 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | University of Warwick, Merck & Co. |
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