Brown, MD;
Jaros, J;
Cox, BT;
Treeby, BE;
(2016)
Control of broadband optically generated ultrasound pulses using binary amplitude holograms.
Journal of the Acoustical Society of America
, 139
(4)
pp. 1637-1647.
10.1121/1.4944758.
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Abstract
In this work, the use of binary amplitude holography is investigated as a mechanism to focus broadband acoustic pulses generated by high peak-power pulsed lasers. Two algorithms are described for the calculation of the binary holograms; one using ray-tracing, and one using an optimization based on direct binary search. It is shown using numerical simulations that when a binary amplitude hologram is excited by a train of laser pulses at its design frequency, the acoustic field can be focused at a pre-determined distribution of points, including single and multiple focal points, and line and square foci. The numerical results are validated by acoustic field measurements from binary amplitude holograms, excited by a high peak-power laser.
| Type: | Article |
|---|---|
| Title: | Control of broadband optically generated ultrasound pulses using binary amplitude holograms |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1121/1.4944758 |
| Publisher version: | http://dx.doi.org/10.1121/1.4944758 |
| Language: | English |
| Additional information: | Copyright © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The published article is available on the journal's website at http://dx.doi.org/10.1121/1.4944758 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1489762 |
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