[EN] In this work, we report the focusing effect of a 2D sonic crystal cuboid. The proposed sonic composite lens is vertically extended from a 2-D flat Phononic Crystal Structure, but it is found to be able to focus waves ...
Dolmatov, Dmitry O.; Tarrazó-Serrano, Daniel; Filippov, German A.; Minin, Igor V.; Minin, Oleg V.; Sednev, Dmitry A.(MDPI AG, 2019-12)
[EN] Currently, phased arrays have found wide application in ultrasonic nondestructive testing. Volumetric results provided by the inspections with linear phased arrays have low lateral resolution in the elevation direction ...
[EN] In this study, we report the characteristics of acoustic jets obtained through a mesoscale (radius less than 5 wavelengths) ABS cylinder made with a 3D printer. We have analyzed the influence of cylinder size on the ...
[EN] The image performance of acoustic and ultrasound sensors depends on several fundamental parameters such as depth of focus or lateral resolution. There are currently two different types of acoustic diffractive lenses: ...
[EN] In this letter, the improvement in focus by the use of a pupil mask produced in an acoustic mesoscale cuboid particle ¿lled with CO2 is reported. Thereby, the result shows that the pupil mask increases the sound ...
[EN] Herein, a simple terahertz (THz) receiver that uses subwavelength focusing of the THz beam on the detector area is proposed. As a proof of concept, a THz detection system with an original optical coupling scheme is ...
[EN] The manipulation of focal patterns of acoustic underwater Soret Zone Plate lens in far fields, such as manipulation (optimization) of Sidelobe Level and the design of long depth of focus by selecting the simple free ...
[EN] A method of detecting dielectric objects hidden behind an opaque barrier located on a
reflective background, based on the distortion of interference fringes, is proposed in this article.
Experiments conducted in the ...
[EN] The capability of focusing of a novel acoustic lens based on a mesoscale acoustic cuboid particle filled with CO2 gas is analysed. This flat lens is able to focus sound in the same way that conventional curved acoustic ...
Rubio Michavila, Constanza; Minin, Igor V.; Minin, Oleg V.; Uris Martínez, Antonio(Acoustical Society of America, 2019-09-06)
We predict acoustic super resonance modes with a field-intensity enhancement several tens of thousands
of times higher (order of magnitude: 104 -10 5) with the support of dielectric mesoscale spheres submerged
in water, ...
[EN] In acoustical lenses both resolution and depth of focus are determined by diffraction and the smaller the lens aperture the worse the resolution and the greater the depth of focus. Diffraction-limited resolution has ...
[EN] 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 ...