Title :
Ultrasonic air-coupled metrology of material surfaces
Author :
Gomez-Ullate, Y. ; De Espinosa, F. Montero
Author_Institution :
Inst. de Acustica, CSIC, Madrid, Spain
Abstract :
This paper describes a new design of air-coupled transducers based on a 1-3 piezocomposite that can be shaped with different focal geometries. Flat and focused transducers up to 4 MHz have been developed and characterized. Surface information of soft and hard materials has been obtained showing the big potential of air-coupled ultrasound to perform profilometry of material surfaces where traditional optical and contact methods are inadequate.
Keywords :
piezoelectric transducers; ultrasonic imaging; ultrasonic materials testing; ultrasonic measurement; ultrasonic transducers; 1-3 piezocomposite; NDE imaging; air-coupled transducers; air-coupled ultrasound; flat transducers; focal geometries; focused transducers; hard materials; material surfaces; profilometry; soft materials; surface information; ultrasonic air-coupled metrology; Frequency; Metrology; Optical surface waves; Piezoelectric transducers; Polymers; Rough surfaces; Surface roughness; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418300
