Results 51 to 60 of about 13,377,581 (358)

Single laser pulse generates dual photoacoustic signals for differential contrast photoacoustic imaging

Scientific Reports, 2017
Photoacoustic sensing and imaging techniques have been studied widely to explore optical absorption contrast based on nanosecond laser illumination. In this paper, we report a long laser pulse induced dual photoacoustic (LDPA) nonlinear effect, which ...
Fei Gao, Xiaohua Feng, Ruochong Zhang, Siyu Liu, Ran Ding, Rahul Kishor, Yuanjin Zheng   +6 more
doaj   +1 more source

Displacement fields of a Cuboid crystal in a Photoacoustic Cell: Mathematical aspects

Қарағанды университетінің хабаршысы. Физика сериясы, 2021
Photo acoustic effect is popular due to a minimal sample preparation during execution, the ability to examine scattering and opaque sample along with the capability to access depth profile.
А.П. Сароде, О.Х. Махаджан   +1 more
doaj   +1 more source

Sound generation using photoacoustic effect [PDF]

Proceedings of Meetings on Acoustics, 2013
It is highly important to generate sound sources in mid air for several applications such as virtual realty and rigorous acoustic measurement. One possible solution for generating sound sources in mid air is photoacoustic effect that generates sounds from the alternate-current component of air expansion due to the heat generated by light absorption of ...
Yasuhiro Oikawa, Kaoru Yamabe, Yoshio Yamasaki   +2 more
openaire   +2 more sources

Photoacoustic effect in a stratified atmosphere

Physical Review E, 2018
The photoacoustic effect is usually studied in an isotropic medium on a laboratory scale. However, it is possible to use optical sources to launch pressure perturbations in the atmosphere consisting of both acoustic and gravity waves. Here photoacoustic theory is extended to incorporate the effects of a stratified atmosphere and a gravitational field ...
Gerald J. Diebold, Wenyu Bai
openaire   +3 more sources

Thermal diffusivity of periderm from tomatoes of different maturity stages as determined by the concept of the frequency-domain open photoacoustic cell [PDF]

, 2011
The frequency-domain open photoacoustic cell (OPC) approach was used to determine room temperature thermal diffusivity of skins (pericarps) from the raw tomatoes (Lycopersicon esculetum Mill.) characterized by the three different stages of ripeness (from
Baesso Mauro, L., Bento, A.C., Bicanic, D.D., Hooft, J.J.J., van der, Koehorst, R.B.M., Medina Neto, A., Velasco Soares, D.   +6 more
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Effects of optical attenuation, heat diffusion and acoustic coherence in photoacoustic signals produced by nanoparticles

, 2018
Behavior of the photoacoustic signal produced by nanoparticles as a function of their concentration was studied in detail. As the concentration of nanoparticles is increased in a sample, the peak-to-peak photoacoustic amplitude increases linearly up to a
Alba-Rosales, J. E., Escamilla-Herrera, L. F., Gutiérrez-Juárez, G., Polo-Parada, L., Ramos-Ortiz, G., Reyes-Ramírez, B.   +5 more
core   +1 more source

Photoacoustic Image Analysis of Dental Tissue Using Two Wavelengths: A Comparative Study

Photonics
This work compares photoacoustic images of a tooth by analyzing the signals generated with wavelengths 532 and 355 nm. This comparison addresses the differences in the optical properties of dental tissue for these wavelengths that affect the resulting ...
Marco P. Colín-García, Misael Ruiz-Veloz, Luis Polo-Parada, Rosalba Castañeda-Guzmán, Gerardo Gutiérrez-Juárez, Argelia Pérez-Pacheco, Roberto G. Ramírez-Chavarría   +6 more
doaj   +1 more source

Photoacoustic generation of focused quasi-unipolar pressure pulses [PDF]

, 2010
The photoacoustic effect was employed to generate short-duration quasi-unipolar acoustic pressure pulses in both planar and spherically focused geometries.
Maslov, Konstantin, Wang, Lihong V., Zhang, Hao F.   +2 more
core   +1 more source

Resolution Enhancement Strategies in Photoacoustic Microscopy: A Comprehensive Review

Micromachines
Photoacoustic imaging has emerged as a promising modality for medical imaging since its introduction. Photoacoustic microscopy (PAM), which is based on the photoacoustic effect, combines the advantages of both optical and acoustic imaging modalities. PAM
Jinying Zhang, Yifan Shi, Yexiaotong Zhang, Haoran Liu, Shihao Li, Linglu Liu   +5 more
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Photoacoustic and fluorescence lifetime imaging of diatoms

Photoacoustics, 2020
Photoacoustic and fluorescent methods are used intensely in biology and medicine. These approaches can also be used to investigate unicellular diatom algae that are extremely important for Earth’s ecology.
Julijana Cvjetinovic, Alexey I. Salimon, Marina V. Novoselova, Philipp V. Sapozhnikov, Evgeny A. Shirshin, Alexey M. Yashchenok, Olga Yu. Kalinina, Alexander M. Korsunsky, Dmitry A. Gorin   +8 more
doaj   +1 more source