Results 51 to 60 of about 13,611 (164)
Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency
Advances in Condensed Matter Physics, 2018 An acoustic metasurface made of a composite structure of cavity and membrane is proposed and numerically investigated. The target frequency is in the low frequency regime (570 Hz).
Huaijun Chen
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Cataractogenesis after Repeat Laser in situ Keratomileusis
Case Reports in Ophthalmology, 2012 There has been the unsubstantiated clinical impression that laser refractive surgery accelerates cataract development along with solid experimental data about the cataractogenic effects of excimer laser treatment.
Ahmad M. Mansour, Marwan Ghabra
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Opto-acoustic feasibility design of a conical acoustic lens [PDF]
IEEE Journal of Oceanic Engineering, 1978 The opto-acoustic design of a liquid-filled conical acoustic lens is discussed. An approximate model of stacked cylindrical elements is used to estimate the focal line. Final optimization is to be achieved experimentally. Diffraction enables point hydrophones to cover a vertical range of 60\deg .
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Subsurface imaging of samples with SAM
Archives of Acoustics, 2014 The paper presents unique abilities of the acoustic microscope to penetrate and visualize an interior of materials which are opaque to the light. The construction of an acoustic lens optimized for subsurface imaging is described.
J. LITNIEWSKI
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Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces
AIP Advances, 2016 Acoustic metasurface (AMS) is a good candidate to manipulate acoustic waves due to special acoustic performs that cannot be realized by traditional materials. In this paper, we design the AMS by using circular-holed cubic arrays.
Xiao-Peng Wang +4 more
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IEEE AccessThe ability to reconstruct acoustic field is essential for applications such as particle manipulation, medical therapy, and ultrasonic imaging. Conventional acoustic field reconstruction algorithms are limited in both speed and accuracy when generating ...
Minjie Ma +3 more
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Mesoscale Acoustical Cylindrical Superlens
MATEC Web of Conferences, 2018 We demonstrate experimentally for the first time the acoustojet (acoustic jets) formed from acoustic plane wave scattering by a penetrable cylindrical particle with dimensions of several wavelengths. It acts as a superlens with subwavelength localization
Minin Igor, Minin Oleg
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Ring-Focusing Fresnel Acoustic Lens for Long Depth-of-Focus Focused Ultrasound with Multiple Trapping Zones. [PDF]
J Microelectromech Syst, 2020 Tang Y, Kim ES.
europepmc +1 more source
Multi-functional programmable active acoustic meta-device: acoustic switch, lens, and barrier
Scientific ReportsActive acoustic metamaterials (AAMM) have garnered special attention because of their potential as multi-function devices. In this direction, the present article demonstrates a novel AAMM that can be programmed as a multi-functional Active Acoustic Meta ...
Anil Pundir, Arpan Gupta, Sarthak Nag
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Steerable High‐Resolution Ultrasound Focusing via Phase‐Array‐Activated Acoustic Meta‐Lenses
Advanced Physics ResearchHigh‐precision dynamic manipulation of 3D acoustic fields is a challenge in acoustics, crucial for applications from high‐resolution imaging to targeted therapy.
Xin‐Yu Cui +7 more
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