Wavelength-scale gas-filled cuboid acoustic lens with diffraction limited focusing

Wavelength-scale gas-filled cuboid acoustic lens with diffraction limited focusing

Dettagli Bibliografici
Parent link:Results in Physics
Vol. 12.— 2019.— [P. 1905-1908]
Ente Autore: Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Отделение экспериментальной физики
Altri autori: Rubio C. Constanza, Tarrazo-Serrano D. Daniel, Minin O. V. Oleg Vladilenovich, Uris A. Antonio, Minin I. V. Igor Vladilenovich
Riassunto:Title screen
Per the laws of geometrical optics, a plane-parallel medium does not possess focusing properties. However, in this paper, we demonstrate for the first time that an acoustic cuboid particle filled with CO2 is able to focus sound despite its flat surface. It is worth noting that traditional lenses focus sound through their curved surfaces. We report both numerically and experimentally the acoustic focusing of a cuboid of 2[lambda] side, where [lambda] is the wavelength in air. From these results, it can be derived that its focusing capabilities are close to the diffraction limit: at frequency of 5000 Hz, acoustic beam waist is about 0.5 wavelength and the gain is 8.8 dB. The flat structure lens proposed open new possibilities to design and built new lightweight and low cost acoustic lenses for different applications
Lingua:inglese
Pubblicazione: 2019
Soggetti:
электронный ресурс
труды учёных ТПУ
sound focusing
CO2 acoustic
lens
diffraction limit
фокусировка
линзы
оптика
дифракция
Accesso online:https://doi.org/10.1016/j.rinp.2019.02.011
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664305

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