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Article
Spherically focused capacitive-film, air-coupled ultrasonic transducer
Journal of the Acoustical Society of America
  • Junho Song, Iowa State University
  • Dale E. Chimenti, Iowa State University
  • Stephen D. Holland, Iowa State University
Document Type
Article
Disciplines
Publication Date
1-24-2006
DOI
10.1121/1.2152293
Abstract
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.
Comments

This article was originally published in Journal of the Acoustical Society of America 119, no. 2 (2006): EL1–EL6, doi:10.1121/1.2152293.

Copyright Owner
Acoustical Society of America
Language
en
File Format
application/pdf
Citation Information
Junho Song, Dale E. Chimenti and Stephen D. Holland. "Spherically focused capacitive-film, air-coupled ultrasonic transducer" Journal of the Acoustical Society of America Vol. 119 Iss. 2 (2006) p. EL1 - EL6
Available at: http://works.bepress.com/stephen_holland/8/