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of 70
pro vyhledávání: '"Roze, Claude"'
A Statistic Vectorial Complex Ray Model (SVCRM) is proposed for the scattering of a plane wave by a non-spherical dielectric particle in three dimensions. This method counts the complex amplitudes of all rays arriving in a tiny box in the observation
Externí odkaz:
http://arxiv.org/abs/2403.13119
Autor:
Touil, Mohamed, Idlahcen, Saïd, Becheker, Rezki, Lebrun, Denis, Rozé, Claude, Hideur, Ammar, Godin, Thomas
Driven by many applications in a wide span of scientific fields, a myriad of advanced ultrafastimaging techniques have emerged in the last decade, featuring record-high imaging speeds abovea trillion-frame-per-second with long sequence depths. Althou
Externí odkaz:
http://arxiv.org/abs/2110.07013
Autor:
Purwar, Harsh, Idlahcen, Saïd, Méès, Loïc, Rozé, Claude, Blaisot, Jean-Bernard, Michard, Marc, Maligne, David
We present an extensive experimental study focused on understanding the impact of cavitation in a high-pressure diesel nozzle on the macroscopic properties of fuel spray. Several high-speed videos of the liquid flow through a transparent, asymmetric
Externí odkaz:
http://arxiv.org/abs/1609.03853
Autor:
Purwar, Harsh, Lounnaci, Kamel, Idlahcen, Saïd, Roze, Claude, Blaisot, Jean-Bernard, Meès, Loïc, Michard, Marc
The entire process of atomization of the fuel in an internal combustion engine plays a very important role in determining the overall efficiency of these engines. A good atomization process could help the fuel to mix with the air properly leading to
Externí odkaz:
http://arxiv.org/abs/1601.06843
We propose a collinear optical Kerr effect (OKE) based time-gate configuration with low coherence illumination source, derived from the supercontinuum (SC) generated by focusing the femtosecond laser pulses inside water. At first the spectral broaden
Externí odkaz:
http://arxiv.org/abs/1502.07255
Publikováno v:
Optics Express 22, 15778-15790 (2014)
Imaging with ultrashort exposure times is generally achieved with a crossed-beam geometry. In the usual arrangement, an off-axis gating pulse induces birefringence in a medium exhibiting a strong Kerr response (commonly carbon disulfide) which is fol
Externí odkaz:
http://arxiv.org/abs/1502.03350
A novel setup is presented for ballistic imaging using an efficient ultrafast Kerr effect based optical time-gate with gating times of the order of ~0.8 picoseconds. At first, the major drawbacks of the classical non-collinear optical setup are discu
Externí odkaz:
http://arxiv.org/abs/1502.03330
We present an optical Kerr effect based time-gate with the collinear incidence of the pump and probe beams at the Kerr medium, liquid carbon disulfide, for ballistic imaging of the high-pressure fuel sprays. The probe pulse used to illuminate the obj
Externí odkaz:
http://arxiv.org/abs/1502.03321
Autor:
Purwar, Harsh, Lounnaci, Kamel, Idlahcen, Saïd, Rozé, Claude, Blaisot, Jean-Bernard, Ménard, Thibault
We present a quantitative comparison between the high-pressure fuel spray images obtained experimentally using classical imaging with coherent and incoherent ultrafast illuminations recorded using a compatible CMOS camera. The ultrafast, incoherent i
Externí odkaz:
http://arxiv.org/abs/1502.03335
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