Ultrasound sensing using the acousto-optic effect in polymer dispersed liquid crystals
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 air-coupled flexural transducers' resonant modes at 295 kHz and 730 kHz. Results are con...
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| Veröffentlicht in: | Applied physics letters 2015-08, Vol.107 (5) |
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| container_title | Applied physics letters |
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| creator | Trushkevych, O. Eriksson, T. J. R. Ramadas, S. N. Dixon, S. Edwards, R. S. |
| description | 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 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 h for laser vibrometry). Heating effects are carefully monitored using thermal imaging and are found not to be the main cause of PDLC clearing. |
| doi_str_mv | 10.1063/1.4928390 |
| format | Article |
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J. R. ; Ramadas, S. N. ; Dixon, S. ; Edwards, R. S.</creator><creatorcontrib>Trushkevych, O. ; Eriksson, T. J. R. ; Ramadas, S. N. ; Dixon, S. ; Edwards, R. S.</creatorcontrib><description>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 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 h for laser vibrometry). 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Heating effects are carefully monitored using thermal imaging and are found not to be the main cause of PDLC clearing.</description><subject>Acousto-optics</subject><subject>Appliance industry</subject><subject>Applied physics</subject><subject>Coupled modes</subject><subject>Dispersion</subject><subject>High temperature effects</subject><subject>Laser beam heating</subject><subject>Lasers</subject><subject>Liquid crystals</subject><subject>Polymers</subject><subject>Scanning</subject><subject>Thermal imaging</subject><subject>Transducers</subject><subject>Ultrasonic imaging</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNotUEtLAzEYDKJgrR78BwFPHrbmS7KPHKX4goIX6zVkk281ZbvZJtlD_72r9TLDwDAzDCG3wFbAKvEAK6l4IxQ7IwtgdV0IgOacLBhjoqhUCZfkKqXdLEsuxIJ8bvscTQrT4GjCIfnhi05_mL-RGhumlEMRxuwtxa5Dm6kf6Bj64x4jdT6NGBM62vvD5B218Ziy6dM1uehmwpt_XpLt89PH-rXYvL-8rR83heWK50LUqpWNAtOKebaoZGs7qVjbWMBGKcutlCgNis40DttWKGsUq5lzaEVpK7Ekd6fcMYbDhCnrXZjiMFdqDlwCA8nL2XV_ctkYUorY6TH6vYlHDUz_3qZB_98mfgBkpGBS</recordid><startdate>20150803</startdate><enddate>20150803</enddate><creator>Trushkevych, O.</creator><creator>Eriksson, T. 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S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c292t-379b4891ab3492364bcf490b8c1e899c2c44e4ae3fa8debb39ca9070ddec35c63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Acousto-optics</topic><topic>Appliance industry</topic><topic>Applied physics</topic><topic>Coupled modes</topic><topic>Dispersion</topic><topic>High temperature effects</topic><topic>Laser beam heating</topic><topic>Lasers</topic><topic>Liquid crystals</topic><topic>Polymers</topic><topic>Scanning</topic><topic>Thermal imaging</topic><topic>Transducers</topic><topic>Ultrasonic imaging</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Trushkevych, O.</creatorcontrib><creatorcontrib>Eriksson, T. J. R.</creatorcontrib><creatorcontrib>Ramadas, S. N.</creatorcontrib><creatorcontrib>Dixon, S.</creatorcontrib><creatorcontrib>Edwards, R. 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The PDLC films are used to image two displacement profiles of 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 h for laser vibrometry). Heating effects are carefully monitored using thermal imaging and are found not to be the main cause of PDLC clearing.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4928390</doi><orcidid>https://orcid.org/0000-0003-2550-3627</orcidid><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Acousto-optics Appliance industry Applied physics Coupled modes Dispersion High temperature effects Laser beam heating Lasers Liquid crystals Polymers Scanning Thermal imaging Transducers Ultrasonic imaging |
| title | Ultrasound sensing using the acousto-optic effect in polymer dispersed liquid crystals |
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