Effect of half‐wavelength membranes on the axial resolution of real‐time ultrasonic scanners
作者:
Jonathan Ophir,
P. A. Narayana,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1983)
卷期:
Volume 74,
issue 3
页码: 687-690
ISSN:0001-4966
年代: 1983
DOI:10.1121/1.389853
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The effect of interposing a half‐wavelength membrane between the transducer and the load in mechanically sectored ultrasonic scanners was investigated. In particular, the effects of impedance mismatch and detuning on broadband spectra were theoretically and experimentally studied. These studies indicate that for certain common cases, a bandwidth reduction of 20%–30% can be anticipated, resulting in a proportional decrease in the axial resolution.
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