Synthetic acoustic holograms realized via optoacoustic methods

Stefan Gspan; Alex Meyer; Stefan Bernet; Monika Ritsch-Marte

doi:10.1117/12.606207

25 April 2005 Synthetic acoustic holograms realized via optoacoustic methods

Stefan Gspan, Alex Meyer, Stefan Bernet, Monika Ritsch-Marte

Proceedings Volume 5697, Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; (2005) https://doi.org/10.1117/12.606207
Event: SPIE BiOS, 2005, San Jose, CA, United States

Abstract

Optoacoustic binary holography is applied to gain complete spatio-temporal control over ultrasonic beams. For flexible temporal intensity modulation of the sound-inducing laser light, an electro-optic modulator is used. Furthermore, in order to generate the desired spatial intensity distributions of the ultrasound, a spatial light modulator impresses synthetic binary holograms on the modulated light beam. At a light absorbing surface the optoacoustic effect converts the modulated light wave into an ultrasonic beam that propagates into water in the holographically predetermined way. With this approach we have successfully generated amplitude distributions that are difficult to realize with traditional piezo-electric techniques.

Citation Download Citation

Stefan Gspan, Alex Meyer, Stefan Bernet, and Monika Ritsch-Marte "Synthetic acoustic holograms realized via optoacoustic methods", Proc. SPIE 5697, Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, (25 April 2005); https://doi.org/10.1117/12.606207

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