Zobrazeno 1 - 10
of 251
pro vyhledávání: '"Boccara, A. C."'
Spatio-Temporal Imaging of Light Transport in Highly Scattering Media under White Light Illumination
Autor:
Badon, Amaury, Li, Dayan, Lerosey, Geoffroy, Boccara, Albert C., Fink, Mathias, Aubry, Alexandre
Publikováno v:
Optica 3, 1160-1166 (2016)
Imaging the propagation of light in time and space is crucial in optics, notably for the study of complex media. We here demonstrate the passive measurement of time-dependent Green's functions between every point at the surface of a strongly scatteri
Externí odkaz:
http://arxiv.org/abs/1606.06046
Publikováno v:
Phys. Rev. Lett. 114, 023901, 2015
We report on the passive measurement of time-dependent Green's functions in the optical frequency domain with low-coherence interferometry. Inspired by previous studies in acoustics and seismology, we show how the correlations of a broadband and inco
Externí odkaz:
http://arxiv.org/abs/1407.0852
Publikováno v:
Nature Photonics 8, 58 (2014)
Optical wavefront-shaping has emerged as a powerful tool to manipulate light in strongly scattering media. It enables diffraction-limited focusing and imaging at depths where conventional microscopy techniques fail. However, while most wavefront-shap
Externí odkaz:
http://arxiv.org/abs/1305.6246
We experimentally measure the monochromatic transmission matrix (TM) of an optical multiple scattering medium using a spatial light modulator together with a phase-shifting interferometry measurement method. The TM contains all information needed to
Externí odkaz:
http://arxiv.org/abs/1107.5285
Publikováno v:
Journal of the Optical Society of America A 28, 7 (2011) 1436--1444
Acousto-Optical Coherence Tomography (AOCT) is variant of Acousto Optic Imaging (called also ultrasonic modulation imaging) that makes possible to get z resolution with acoustic and optic Continuous Wave (CW) beams. We describe here theoretically the
Externí odkaz:
http://arxiv.org/abs/1106.4890
Publikováno v:
Nat. Commun. 1:81(2010)
Optical imaging relies on the ability to illuminate an object, collect and analyze the light it scatters or transmits. Propagation through complex media such as biological tissues was so far believed to degrade the attainable depth as well as the res
Externí odkaz:
http://arxiv.org/abs/1005.0532
Publikováno v:
Phys. Rev. Lett. 104, 100601 (2010)
We introduce a method to experimentally measure the monochromatic transmission matrix of a complex medium in optics. This method is based on a spatial phase modulator together with a full-field interferometric measurement on a camera. We determine th
Externí odkaz:
http://arxiv.org/abs/0910.5436
Publikováno v:
Opt. Lett. 34, 1576-1578 (2009)
We report experimental evidence and correction of defocus in full-field OCT of biological samples due to mismatch of the refractive index of biological tissues and water. Via a metric based on the image quality, we demonstrate that we are able to com
Externí odkaz:
http://arxiv.org/abs/0901.2793
Publikováno v:
Journal de Physique III,7: (2) 303-310, (1997)
We use thermal imaging of Joule heating to see for the first time electrical conducting paths created by the so-called Branly effect in a two-dimensional metallic granular medium (aluminium). Multiple breakdowns are shown to occur when the medium is
Externí odkaz:
http://arxiv.org/abs/cond-mat/9807012
Autor:
Badon, Amaury, Barolle, Victor, Irsch, Kristina, Boccara, Albert C., Fink, Mathias, Aubry, Alexandre
33 pages, 8 figures; In optical imaging, light propagation is affected by the inhomogeneities of the medium. Sample-induced aberrations and multiple scattering can strongly degrade the image resolution and contrast. Based on a dynamic correction of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3fbb764d95d36422805a89bb64534319
https://hal.archives-ouvertes.fr/hal-02413352/document
https://hal.archives-ouvertes.fr/hal-02413352/document