Title :
Evaluation of transducers with near-field scanning of their surfaces
Author :
Jian-yu Lu ; Greenleaf, James F.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
Recently, near-field imaging has bean studied in microwaves, optics, and acoustics. In this paper, we study the near-field imaging of wave sources and thus the structure of transducers in high resolution. In addition, we report the near-field imaging of array transducers that were driven with alternating phases on adjacent elements. This produces high contrast images of the array structures. Results suggest that these methods may be useful for transducer manufacturers, designers, and researchers
Keywords :
acoustic transducers; hydrophones; ultrasonic imaging; ultrasonic transducer arrays; 0.75 MHz; 1.5 MHz; 2 MHz; active structure imaging; air-backed piston transducers; alternating phase driving; annular array transducer; array transducers; high contrast images; high resolution; hydrophones; linear array transducer; near-field imaging; near-field surface scanning; transducer manufacture; transducer structure; wave sources; Acoustic arrays; Acoustic imaging/mapping; Acoustic transducers; Hydrophones;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401793
