oaioai:doaj.org/article:e0a68c88894d4287a46cf9d721e30021

Analysis of Fresnel Zone Plates Focusing Dependence on Operating Frequency

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Publication date
1 December 2017
Publisher
'MDPI AG'
Doi

    Abstract

    The focusing properties of Fresnel Zone Plates (FZPs) against frequency are analyzed in this work. It is shown that the FZP focal length depends almost linearly on the operating frequency. Focal depth and focal distortion are also considered, establishing a limit on the frequency span at which the operating frequency can be shifted. An underwater FZP ultrasound focusing system is demonstrated, and experimental results agree with the theoretical analysis and simulations

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    Last time updated on 07/12/2017

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