{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,18]],"date-time":"2025-10-18T15:13:40Z","timestamp":1760800420961,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2020,11,29]],"date-time":"2020-11-29T00:00:00Z","timestamp":1606608000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004837","name":"MICINN","doi-asserted-by":"publisher","award":["RTI2018-100792-B-I00","BES-2016-07713"],"award-info":[{"award-number":["RTI2018-100792-B-I00","BES-2016-07713"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003359","name":"Generalitat Valenciana","doi-asserted-by":"publisher","award":["AICO\/2020\/139"],"award-info":[{"award-number":["AICO\/2020\/139"]}],"id":[{"id":"10.13039\/501100003359","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100012934","name":"Tomsk Polytechnic University","doi-asserted-by":"publisher","award":["VIU-MNOL NK 187\/2020"],"award-info":[{"award-number":["VIU-MNOL NK 187\/2020"]}],"id":[{"id":"10.13039\/100012934","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Russian Government","award":["FSWW-2020-0014"],"award-info":[{"award-number":["FSWW-2020-0014"]}]},{"DOI":"10.13039\/501100004233","name":"Universitat Polit\u00e8cnica de Val\u00e8ncia","doi-asserted-by":"publisher","award":["PAID-01-18"],"award-info":[{"award-number":["PAID-01-18"]}],"id":[{"id":"10.13039\/501100004233","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Fresnel Zone Plates are planar lenses that can be used to focus ultrasound beams. This kind of acoustic lenses can play a key role in the resolution of ultrasonic NDT systems. In this type of pulse-echo applications, the pulse duration is an important parameter that specifies the axial resolution, and thus, shorter ultrasound pulses provide higher resolutions. However, acoustic lenses exhibit a transient response that should be considered when setting the pulse duration, as pulses shorter than the transient state duration result in degradation in the response of acoustic lenses in terms of focal intensity, focal displacement, and lateral and axial resolutions. In this work, a thorough analysis of the transient response of Fresnel Zone Plates is discussed, demonstrating that the transient state should be considered in order to achieve optimal focusing performance. Theoretical and numerical results are presented, showing very good agreement.<\/jats:p>","DOI":"10.3390\/s20236824","type":"journal-article","created":{"date-parts":[[2020,11,29]],"date-time":"2020-11-29T21:00:57Z","timestamp":1606683657000},"page":"6824","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Transient Analysis of Fresnel Zone Plates for Ultrasound Focusing Applications"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9689-455X","authenticated-orcid":false,"given":"Sergio","family":"P\u00e9rez-L\u00f3pez","sequence":"first","affiliation":[{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Universitat Polit\u00e8cnica de Val\u00e8ncia, 46022 Val\u00e8ncia, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9986-0884","authenticated-orcid":false,"given":"Daniel","family":"Tarraz\u00f3-Serrano","sequence":"additional","affiliation":[{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Universitat Polit\u00e8cnica de Val\u00e8ncia, 46022 Val\u00e8ncia, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1789-1519","authenticated-orcid":false,"given":"Dimitry O.","family":"Dolmatov","sequence":"additional","affiliation":[{"name":"National Research Tomsk Polytechnic University, Tomsk 634050, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4395-7473","authenticated-orcid":false,"given":"Constanza","family":"Rubio","sequence":"additional","affiliation":[{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Universitat Polit\u00e8cnica de Val\u00e8ncia, 46022 Val\u00e8ncia, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9924-7673","authenticated-orcid":false,"given":"Pilar","family":"Candelas","sequence":"additional","affiliation":[{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Universitat Polit\u00e8cnica de Val\u00e8ncia, 46022 Val\u00e8ncia, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1016\/j.ultsonch.2004.01.015","article-title":"Potential for the use of ultrasound in the extraction of antioxidants from Rosmarinus officinalis for the food and pharmaceutical industry","volume":"11","author":"Albu","year":"2004","journal-title":"Ultrason. 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