Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Y. Guern"'
Publikováno v:
Journal of Physics D: Applied Physics. 34:1122-1130
We have experimentally assessed the efficiency of a new underwater-target detection scheme, called modulated lidar. The technique used is based on a remarkable physical property of the propagating medium; sea-water has a low-pass transfer function in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6aa8f8ca3f054103c75564d666086574
https://doi.org/10.1088/0022-3727/34/7/315
https://doi.org/10.1088/0022-3727/34/7/315
Publikováno v:
Journal of Physics D: Applied Physics. 33:349-354
The temporal frequency response of water supplemented with scattering particles was deduced from the measurement of the optical backscattering of a short (100 ps) blue-green (532 nm) optical pulse given by a frequency-doubled Nd:YAG laser. Indeed, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc93635892852ff0e9dfb274571dbd7f
https://doi.org/10.1088/0022-3727/33/4/306
https://doi.org/10.1088/0022-3727/33/4/306
Publikováno v:
Waves in Random Media. 9:489-499
This paper discusses the experimental validity of a frequently assumed fact: in a highly anisotropic scattering medium considered as infinite, a collimated intensity-modulated beam source can be modelled by a point-like source located on the emissive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3c2d32e0472a80481512f5c3de253c3
https://doi.org/10.1088/0959-7174/9/4/303
https://doi.org/10.1088/0959-7174/9/4/303
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy
Spectrochimica Acta Part B: Atomic Spectroscopy, Elsevier, 1998, 53, pp.1347--1353. ⟨10.1016/S0584-8547(98)00178-5⟩
Spectrochimica Acta Part B: Atomic Spectroscopy, Elsevier, 1998, 53, pp.1347--1353. ⟨10.1016/S0584-8547(98)00178-5⟩
International audience; This paper reports on activation energies measured during copper and manganese atomization in a graphite furnace in the presence of large amounts of nitrate and sulfate matrices. It also deals with activation energies correspo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45f1c1d8850763c37ff270b6bfac5101
https://doi.org/10.1016/s0584-8547(98)00178-5
https://doi.org/10.1016/s0584-8547(98)00178-5
Publikováno v:
Journal of Optics. 28:218-224
The present paper discusses the possibility of using a coherent beat-modulated source in a frequency domain approach to probe the characteristics of a highly scattering medium with low absorption. The theoretical approach is based on the diffusion ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ce2ec457c95d39ae1b12e21a5c42d42
https://doi.org/10.1088/0150-536x/28/5/008
https://doi.org/10.1088/0150-536x/28/5/008
De l'installation d'un simple chauffe-eau solaire au système de chauffage avec eau chaude sanitaire, cet ouvrage pose les fondamentaux pour comprendre et s'approprier les connaissances techniques nécessaires à la réalisation d'une installation so
Publikováno v:
Journal of Physics D: Applied Physics. 34:L49-L51
We show the effect of multiple scattering on the shape of the pulse returned by a modulated lidar for bathymetry studies. Multiple scattering lengthens the tracks of individual photons, and consequently broadens pulse shape destroying the modulation.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dcd9daee23678b19a658d4b4101aa90
https://doi.org/10.1088/0022-3727/34/11/101
https://doi.org/10.1088/0022-3727/34/11/101
Publikováno v:
Applied optics. 15(11)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e4eb81b83a1ea516464158aeb37d524
https://pubmed.ncbi.nlm.nih.gov/20165459
https://pubmed.ncbi.nlm.nih.gov/20165459
Publikováno v:
SPIE Proceedings.
The investigation of the speckle fields obtained from biological fluids or tissues, can be used in medical applications, as an experimental non invasive method to get informations using low cost and low energy lasers. We give a few examples concernin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5249fb5759aafb6b869c660573bb478b
https://doi.org/10.1117/12.695257
https://doi.org/10.1117/12.695257
Autor:
Bernard Le Jeune, Jean Francois Abgrall, Jack Cariou, Maria Therese Blouch, Y. Piederrière, Y. Guern, Guy Le Brun, J Lotrian
Publikováno v:
Journal of biomedical optics. 9(2)
Analysis of speckle dynamics is frequently used to study themotion of scattered objects or liquids. By assessing the increase incontrast on the speckle field produced by a blood plasma sample,illuminated by a laser during a coagulation test, as well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e707db14dcc33e9885f5fd7830227257
https://pubmed.ncbi.nlm.nih.gov/15065909
https://pubmed.ncbi.nlm.nih.gov/15065909