Spherically focused capacitive-film, air-coupled ultrasonic transducer

被引：6
|
作者：
Song, J [1 ]
Chimenti, AE
Holland, SD
机构：
[1] Iowa State Univ, Ctr Nondestruct Evaluat, Ames, IA 50011 USA
[2] Iowa State Univ, Dept Aerosp Engn, Ames, IA 50011 USA
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2006年 / 119卷 / 02期
基金：
美国国家航空航天局;
关键词：
D O I：
10.1121/1.2152293
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
A spherically focused (no mirrors) capacitive-film, air-coupled ultrasonic transducer, constructed using a spherically deformed backplate and metalized polymer film, has been designed, fabricated, and its performance characterized. A 1 cm diameter device has a center frequency of 805 kHz and a 6 dB bandwidth of 760 kHz. Comparisons of field strength in the focal zone with theoretical calculations for a spherically focused piston show that the device achieves diffraction-limited focusing. The nominal focal point of 25 mm lies within 0.01 mm of the calculated value for this device. (c) 2006 Acoustical Society of America.
引用
收藏
页码：EL1 / EL6
页数：6
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