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Proceedings Paper

Optical full-field holographic detection system for non-contact photoacoustic tomography
Author(s): Jens Horstmann; Ralf Brinkmann
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Paper Abstract

We introduce an innovative detection approach for photoacoustic tomography. The pressure induced surface displacement is obtained in 2D by Electronic Speckle Pattern Interferometry (ESPI) in a repetitive measurement with a variable time delay between excitation- and detection pulses. The detection approach works without any physical contact to the object surface and is very versatile in terms of an adjustable object surface area and an adjustable temporal sampling rate. Furthermore, the approach is potentially very fast by the use of a high speed camera and a high repetition laser excitation and detection. In a proof of concept measurement, transparent silicone cubes with black silicone sphere absorbers are measured. In order to validate the acquired displacement data, the pressure is measured using a lipstick needle hydrophone and correlated to the measured displacement.

Paper Details

Date Published: 3 March 2014
PDF: 6 pages
Proc. SPIE 8943, Photons Plus Ultrasound: Imaging and Sensing 2014, 89431L (3 March 2014); doi: 10.1117/12.2036711
Show Author Affiliations
Jens Horstmann, Medical Laser Ctr. Lübeck (Germany)
Ralf Brinkmann, Medical Laser Ctr. Lübeck (Germany)
Univ. of Lübeck (Germany)


Published in SPIE Proceedings Vol. 8943:
Photons Plus Ultrasound: Imaging and Sensing 2014
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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