Results 41 to 50 of about 13,611 (164)

An Acoustic Lens for Underwater Sound [PDF]

The Journal of the Acoustical Society of America, 1947
In order to meet a demand for plane or converging waves in underwater acoustic measurements an acoustic lens has been developed. The lens employs carbon tetrachloride contained in a metal form. The curved surfaces of the lens are spun to the desired curvature from 0.026-in. aluminum sheet, and these are assembled with a brass frame.
openaire   +1 more source

Axial Signal Analysis and Image Reconstruction in Acoustic Lens Photoacoustic Imaging System

IEEE Access, 2017
The lateral imaging characteristic of an acoustic lens is similar to the well-known object-image relationship of an optical lens. In this paper, axial signal analysis is carried on and reconstruction methods for a sample's axial photoacoustic (PA) image ...
Yu Zhang, Zhilie Tang, Yongbo Wu, F. D. Jiantong Zhang   +3 more
doaj   +1 more source

Non-conventional ultrasound transducer geometry facilitates remote light control within samples

JPhys Photonics
Light control inside a sample is central in areas as relevant as life sciences and material sciences. Traditionally, this is achieved by using external devices, which can be limited by a short working distance, scattering-limited focusing depth, and ...
Jordi Torres-Durall, Martí Duocastella
doaj   +1 more source

Direct and real-time sub-wavelength resolution photoacoustic imaging method based on acoustic lens with negative refractive index

Journal of Measurement Science and Instrumentation, 2016
The signal processing technology based on material with negative refractive index provides researchers with the latest ideas.As a new nondestructive bio-photonic technology,photoacoustic tomography is a kind of imaging method based on the differences of ...
HAN Jian-ning, GUI Zhi-guo, WEN Ting-dun, TIAN Er-ming, YANG Peng, ZHANG Quan   +5 more
doaj  

Multiview spatial compounding using lens-based photoacoustic imaging system

Photoacoustics, 2019
Recently, an acoustic lens has been proposed for volumetric focusing as an alternative to conventional reconstruction algorithms in Photoacoustic (PA) Imaging.
Kalloor Joseph Francis, Bhargava Chinni, Sumohana S. Channappayya, Rajalakshmi Pachamuthu, Vikram S. Dogra, Navalgund Rao   +5 more
doaj   +1 more source

Drug delivery by sonosensitive liposome and microbubble with acoustic-lens attached ultrasound: an in vivo feasibility study in a murine melanoma model. [PDF]

Sci Rep, 2023
Park JH, Lee BC, Seo YC, Kim JH, Kim DJ, Lee HJ, Moon H, Lee S.   +7 more
europepmc   +1 more source

Interactions in an Acoustic World: Dumb Hole

Advances in High Energy Physics, 2018
The present paper aims to complete an earlier paper where the acoustic world was introduced. This is accomplished by analyzing the interactions which occur between the inhomogeneities of the acoustic medium, which are induced by the acoustic vibrations ...
Ion Simaciu, Gheorghe Dumitrescu, Zoltan Borsos, Mariana Brădac   +3 more
doaj   +1 more source

Simultaneously imaging and quantifying in vivo mechanical properties of crystalline lens and cornea using optical coherence elastography with acoustic radiation force excitation

APL Photonics, 2019
The crystalline lens and cornea comprise the eye’s optical system for focusing light in human vision. The changes in biomechanical properties of the lens and cornea are closely associated with common diseases, including presbyopia and cataract. Currently,
Yan Li, Jiang Zhu, Jason J. Chen, Junxiao Yu, Zi Jin, Yusi Miao, Andrew W. Browne, Qifa Zhou, Zhongping Chen   +8 more
doaj   +1 more source

Underwater double vortex generation using 3D printed acoustic lens and field multiplexing

APL Materials
The generation of acoustic vortex beams has attracted an increasing amount of research attention in recent years, offering a range of functions, including acoustic communication, particle manipulation, and biomedical ultrasound.
Chadi Ellouzi, Ali Zabihi, Farhood Aghdasi, Aidan Kayes, Milton Rivera, Jiaxin Zhong, Amir Miri, Chen Shen   +7 more
doaj   +1 more source

Tunable Acoustic Tweezer System for Precise Three-Dimensional Particle Manipulation

Micromachines
This study introduces a tunable acoustic tweezer system designed for precise three-dimensional particle trapping and manipulation. The system utilizes a dual-liquid-layer acoustic lens, which enables the dynamic control of the focal length through the ...
Jiyun Nan, Hiep Xuan Cao, Jong-Oh Park, Eunpyo Choi, Byungjeon Kang   +4 more
doaj   +1 more source