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Proceedings Paper

Characterization of optoacoustic transducers through the analysis of angular-dependent frequency response
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Paper Abstract

Comprehensive characterization of optoacoustic transducers is achieved through the analysis of their frequency response using a procedure of measuring angular dependence of the transducer sensitivity to the ultrawide-band delta pulse. The testing was performed under standard repeatable operating conditions. Back-illumination of a blackened, acoustically matched, planar surface with a short laser pulse creates an acoustic impulse which was used as an ultrawide-band ultrasonic source. The bandwidth of such a source extends well over 10 MHz (6dB point at 16 MHz for illumination with a 16 ns pulse) and the low frequency roll-off is around 300 kHz. Analysis of the angular dependence of the frequency response yields invaluable directivity information about the detector under study, which in turn permits accurate forward and inverse problem models.

Paper Details

Date Published: 25 February 2009
PDF: 8 pages
Proc. SPIE 7177, Photons Plus Ultrasound: Imaging and Sensing 2009, 71770U (25 February 2009); doi: 10.1117/12.812339
Show Author Affiliations
André Conjusteau, Fairway Medical Technologies, Inc. (United States)
Sergey A. Ermilov, Fairway Medical Technologies, Inc. (United States)
Richard Su, Fairway Medical Technologies, Inc. (United States)
Hans-Peter Brecht, Fairway Medical Technologies, Inc. (United States)
Matthew P. Fronheiser, Seno Medical Instruments (United States)
Alexander A. Oraevsky, Fairway Medical Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 7177:
Photons Plus Ultrasound: Imaging and Sensing 2009
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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