Publication Details
Control of Broadband Optically Generated Ultrasound Pulses Using Binary Amplitude Holograms
Jaroš Jiří, doc. Ing., Ph.D. (DCSY FIT BUT)
Cox Ben T. (UCL)
Treeby Bradley E. (UCL)
ultrasound, photoacoustic , spectral methods, k-Wave
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.
@ARTICLE{FITPUB10973,
author = "D. Michael Brown and Ji\v{r}\'{i} Jaro\v{s} and T. Ben Cox and E. Bradley Treeby",
title = "Control of Broadband Optically Generated Ultrasound Pulses Using Binary Amplitude Holograms",
pages = "1637--1647",
journal = "Journal of the Acoustical Society of America",
volume = 139,
number = 4,
year = 2016,
ISSN = "1520-8524",
doi = "10.1121/1.4944758",
language = "english",
url = "https://www.fit.vut.cz/research/publication/10973"
}