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2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121)
A 2D optical ultrasound receive array has been investigated. The transduction mechanism is based upon the detection of acoustically-induced changes in the optical thickness of a thin polymer film acting as a Fabry Perot interferometer (FPI). A sensor head employing a medium finesse polymer film FPI has been fabricated and characterised. By illuminating the interferometer with a large diameter (12mm) laser beam and raster scanning a photodiode across the reflected output beam, a 2D ultrasounddoi:10.1109/ultsym.2000.921534 fatcat:tk5d6un5onh5betj6clnjhkjpq