Title :
Characterization of Ultrasonic Transducers Using the Schlieren-Technique
Author :
Reichel, Erwin K. ; Schneider, Sebastian C. ; Zagar, Bernhard G.
Author_Institution :
Inst. for Meas. Technol., Johannes Kepler Univ., Linz
Abstract :
Acoustic pulse-waves in water generated by ultrasonic transducers with power levels in the medical diagnostic range are characterized by analyzing the optical diffraction patterns of short laser pulses due to pressure waves. The diffracted laser light is filtered in the Fourier-plane of an optical system and projected onto a CCD-camera. Using this technique it is possible to measure the ultrasound-field in a short time interval, which would otherwise last hours or days using the standard method of measuring the intensity in a large number of points in three dimensions with a hydrophone. Additionally the phase-information of the ultrasonic wave is acquired easily
Keywords :
CCD image sensors; acoustic pulses; schlieren systems; ultrasonic transducers; CCD camera; Fourier plane; Schlieren technique; acoustic pulse-waves; diffracted laser light; hydrophone; optical diffraction patterns; phase information; short time interval; ultrasonic transducers; ultrasound field; Acoustic pulses; Acoustic waves; Biomedical acoustics; Character generation; Optical diffraction; Optical filters; Optical pulse generation; Time measurement; Ultrasonic transducers; Ultrasonic variables measurement; optoacoustic measurement; phase-contrast; schlieren- technique; ultrasonic transducer characterization;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-8879-8
DOI :
10.1109/IMTC.2005.1604513
