Výsledky vyhledávání - "Michel Lequime"

Elektronická kniha

De l'Optique électromagnétique à l'Interférométrie : Concepts et illustrations

Autor: Michel Lequime, Claude Amra

Ce livre, rédigé par des enseignants de Centrale Marseille, propose une approche unifiée des concepts qui fondent l'Optique physique, ce domaine clef de la Photonique qui va de l'Optique électromagnétique à l'Interférométrie en passant par la

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Blazed gratings on convex substrates for high throughput spectrographs

Autor: Frédéric Zamkotsian, Roger Krähenbühl, Patrick Lanzoni, Guillaume Basset, Michel Lequime, Myriam Zerrad, Claude Amra, Vincent Costes, Jacques Loesel

Publikováno v: Proceedings of the SPIE
Proceedings of the SPIE, 0000, à renseigner, Unknown Region. ⟨10.1117/12.2630045⟩

International audience; In next generation space and ground-based instrumentation for Earth and Universe Observation, new instrument concepts include often non planar gratings. Their realization is complex and costly. We propose a new technology for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4798b5fb04a37fa53acbd46f20278923
https://hal.science/hal-03948224

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Low coherence interferometric detection of the spectral dependence of the retro-reflection coefficient of an anti-reflective coated interface

Autor: Michel Lequime, Imran Khan, Myriam Zerrad, Claude Amra

The measurement of very low reflection coefficients of anti-reflective coated interfaces has become a key issue for the realization of precision instruments such as the giant interferometers used for the detection of gravitational waves. We propose i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbeac4a172bb2d6a4ee7bf0ecf51569b
http://arxiv.org/abs/2211.16013

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Immediate and one-point roughness measurements using spectrally shaped light

Autor: Xavier Buet, Myriam Zerrad, Michel Lequime, Gabriel Soriano, Jean-Jacques Godeme, Jalal Fadili, Claude Amra

Publikováno v: OIC 2022
OIC 2022, Jun 2022, Whistler, Canada
Optics Express
Optics Express, 2022, 30 (10), pp.16078-16093. ⟨10.1364/OE.450790⟩

Capitalizing on a previous theoretical paper, we propose a novel approach, to our knowledge, that is different from the usual scattering measurements, one that is free of any mechanical movement or scanning. Scattering is measured along a single dire

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::023b8e3f142250955349895a6fe49022
https://pubmed.ncbi.nlm.nih.gov/36221460

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Analysis of the multilayer organization of a sunflower leaf during dehydration with terahertz time-domain spectroscopy

Autor: Yannick Abautret, Dominique Coquillat, Michel Lequime, Myriam Zerrad, Claude Amra

Publikováno v: Optics Express
Optics Express, 2022, 30 (21), pp.37971. ⟨10.1364/oe.463228⟩
Optics Express, Optical Society of America-OSA Publishing, 2022, 30 (21), pp.37971. ⟨10.1364/OE.463228⟩

International audience; We apply reverse engineering techniques (RET) to analyze the dehydration process of a sunflower leaf with terahertz time-domain spectroscopy. The multilayer structure of the leaf is extracted with accuracy during the entire pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cf030e56471113bd4e3869d19ee78bd
https://hal.science/hal-03869090/document

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A new spatially and angularly resolved scatterometer

Autor: Adrien Bolliand, Edith Hartmann, Michel Lequime, Myriam Zerrad, Claude Amra

Publikováno v: Optical Interference Coatings
Optical Interference Coatings, Jun 2022, Vancouver, Canada. pp.ThB.7, ⟨10.1364/OIC.2022.ThB.7⟩

International audience; We present the main improvements to a scatterometer developed at the Fresnel Institute allowing the spatially resolved recording (up to 1 million elementary pixels) of the light transmitted or scattered by a plane sample.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02a197c95e0530c30378d44ddb753a84
https://hal.science/hal-03829164

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Automatic spectral calibration of a wavelength and angle resolved scatterometer

Autor: Marin Fouchier, Myriam Zerrad, Michel Lequime, Claude Amra

Publikováno v: Optical Interference Coatings Conference (OIC) 2022.

We describe the latest improvements of our spectral and angular light scattering characterization apparatus (SALSA) and in particular its automatic spectral calibration using gas discharge sources.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b98e6b268a5768b2fc08ddda0e3a0f30
https://doi.org/10.1364/oic.2022.thb.9

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Measurement of the spectral dependence of the amplitude and phase properties of laser line antireflection coatings using balanced low coherence interferometry

Autor: Imran Khan, Michel Lequime, Myriam Zerrad, Claude Amra

Publikováno v: Optical Interference Coatings Conference (OIC) 2022.

We show how the use of a balanced low coherence interferometric scheme allows the ultra-low coefficient of reflection of a laser line antireflection coating to be ac-curately measured, together in amplitude and phase.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a843265ae0b8f0df1cc9a3016f1b24f
https://doi.org/10.1364/oic.2022.thb.8

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Micro-cavity optimization for ultra-sensitive all-dielectric optical sensors

Autor: Paul Rouquette, Claude Amra, Myriam Zerrad, Michel Lequime

Publikováno v: Optics Express
Optics Express, 2022, 30 (9), pp.15344-15364. ⟨10.1364/OE.457061⟩
OIC 2022
OIC 2022, Jun 2022, Whistler, Canada. pp.TA.2, ⟨10.1364/OIC.2022.TA.2⟩

International audience; We present an analytical method for the optimization of luminescent micro-cavities to create a substrate that is extremely sensitive to contamination. Giant optical enhancement can thus be controlled arbitrarily and simultaneo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::905ff8c33e78b22d69e310690b7e8034
https://hal.science/hal-03720515/document

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Instantaneous measurement of surface roughness spectra using white-light scattering projected on a spectrometer

Autor: Xavier Buet, Myriam Zerrad, Michel Lequime, Gabriel Soriano, Jean-Jacques Godeme, Jalal Fadili, Claude Amra

Publikováno v: OSA Applied Optics--Information Processing
OSA Applied Optics--Information Processing, In press, 62 (7), pp.B164-B169. ⟨10.1364/AO.477196⟩

Following on from previous studies on motionless scatterometers based on the use of white light, we propose a new, to the best of our knowledge, experiment of white-light scattering that should overtake the previous ones in most situations. The setup

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ae0746cee8ed098e3ba6fd7e7c2aa43
https://doi.org/10.1364/ao.477196

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