Dr. Pierre Etcheto Profile

Dr. Pierre Etcheto

Optical Engineer at Ctr National d'Etudes Spatiales

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Author

Publications (27)

Proceedings Article | 12 July 2023 Open Access

New silicon carbide with light scattering reduction

M. Ferrato, M. Zerrad, M. Fouchier, P. Etcheto, M. Tatat, J. Lavenac

Proceedings Volume 12777, 127772Z (2023) https://doi.org/10.1117/12.2690320

KEYWORDS: Astronomical imaging, Silicon carbide, Light scattering, Scattering

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Proceedings Article | 12 July 2023 Open Access

SUAVE: a disruptive off-axis SiC far UV lyman-alpha solar telescope for long term observations

Luc Damé, Eleanore Fringhian rupert, Patrick Lacroix, Pierre Gilbert, Nicolas Caignard, Mustapha Meftah, Nicolas Rouanet, Pierre Etcheto, Jacques Berthon

Proceedings Volume 12777, 1277702 (2023) https://doi.org/10.1117/12.2688480

KEYWORDS: Mirrors, Silicon carbide, Telescopes, Ultraviolet radiation, Design and modelling, Tunable filters, Astronomical imaging, Windows, Ultraviolet telescopes, Solar telescopes

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Proceedings Article | 29 August 2022 Poster

SUAVE: A disruptive far UV solar telescope for long lasting observation performances in Space

Luc Damé, Mustapha Meftah, Eleanore Fringhian-Rupert, Nicolas Rouanet, Pierre Gilbert, Patrick Lacroix, Pierre Etcheto, Jacques Berthon

Proceedings Volume 12181, 121813F (2022) https://doi.org/10.1117/12.2631949

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Proceedings Article | 14 December 2020 Presentation

SUAVE, a disruptive far UV telescope designed for long lasting performances in space

Luc Damé, Mustapha Meftah, Nicolas Rouanet, Pierre Gilbert, Pierre Etcheto, Jacques Berthon

Proceedings Volume 11444, 114440D (2020) https://doi.org/10.1117/12.2563375

KEYWORDS: Ultraviolet telescopes, Optical instrument design, Ultraviolet radiation, Silicon carbide, Mirrors, Off axis mirrors, Aerospace engineering, Space operations, Solar telescopes, Telescopes

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Proceedings Article | 12 July 2019 Open Access

PILOT optical alignment

B. Mot, G. Roudil, Y. Longval, P. Ade, Y. André, J. Aumont, L. Baustista, J. -P. Bernard, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A. Caillat, M. Charra, M. Chaigneau, B. Crane, J. -P. Crussaire, F. Douchin, E. Doumayrou, J. -P. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B. Leriche, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, J. Narbonne, J. -P. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J. -P. Torre, C. Tucker

Proceedings Volume 11180, 111806Z (2019) https://doi.org/10.1117/12.2536170

KEYWORDS: Mirrors, Optical alignment, Telescopes, Thermal modeling, Galactic astronomy, Polarization, Off axis mirrors, Image quality, Photometry, Point spread functions

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Proceedings Article | 10 July 2018 Presentation

An innovative far UV telescope for space weather and solar variability studies (Conference Presentation)

Luc Damé, Mustapha Meftah, Nicolas Rouanet, Pierre Gilbert, Pierre Etcheto, Jacques Berthon

Proceedings Volume 10699, 106990I (2018) https://doi.org/10.1117/12.2312291

KEYWORDS: Ultraviolet telescopes, Space telescopes, Ultraviolet radiation, Off axis mirrors, Mirrors, Solar telescopes, Optical instrument design, Telescopes, Silicon carbide, Aerospace engineering

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Proceedings Article | 15 June 2018 Paper

Characterization of gratings for space applications

Sakina Achour, Quentin Kuperman-Le Bihan, Pierre Etcheto

Proceedings Volume 10692, 1069219 (2018) https://doi.org/10.1117/12.2312059

KEYWORDS: Light scattering, Scattering, Diffraction gratings, Scatter measurement, Diffraction, Visible radiation, Bidirectional reflectance transmission function, Ultraviolet radiation, Stray light, Infrared signatures

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Control stray light is very important in space industry. Indeed, it is one of the main factors in the decreasing of the signal-to-noise and the contrast. Stray light is generally caused by scattered light and ghost images. The Bidirectional Scatter Distribution function (BSDF) measurements allow the quantification of the scattered light by an optical element and becomes an important data to take into consideration when designing telescopes. Standard BSDF measurement goniophotometers often have a resolution of about 0.1° and are mainly working in or close to the visible spectrum. This resolution is far too loose to characterize ultra-polished surfaces. Besides, wavelength range of BSDF measurements for space projects needs to be done far from visible range. How can we measure BSDF of ultra-polished surfaces and diffraction gratings in the UV and IR range with high resolution? We worked on developing a new goniophometer bench in order to be able to characterize scattering of ultra-polished surfaces and diffraction gratings used in everyday space applications. This ten meters long bench was developed using a collimated beam approach as opposed to goniophotometer using focused beam. Sources used for IR characterization were CO₂ (10.6μm) and Helium Neon (3.39μm) lasers. Regarding UV sources, a collimated and spatially filtered UV LED was used. The detection was ensure by a photomultiplier coupled with synchronous detection as well as a MCT InSb detector. The so-built BSDF measurement instrument allowed us to measure BSDF of ultra-polished surfaces as well as diffraction gratings with an angular resolution of 0.02° and a dynamic of 1013 in the visible range. In IR as well as in UV we manage to get 10⁹ with same angular resolution of 0.02°. The 1m arm and translation stages allows us to measure samples up to 200mm. Thanks to such a device allowing ultra-polished materials as well as diffraction gratings scattering characterization, it is possible to implement those BSDF measurements into simulation software and predict stray light issues. This is a big help for space industry engineers to apprehend stray light due to surface finishes and to delete those effects before the whole project is done. We are now thinking of possible improvement on our optical bench to try to get dynamic in IR and UV similar to what we have in visible range (e.g. 10¹³).

Proceedings Article | 3 April 2018 Open Access

Presentation du banc de diffusiometrie optique CNES

Bernard Cousin, Pierre Etcheto

Proceedings Volume 10570, 1057025 (2018) https://doi.org/10.1117/12.2326631

KEYWORDS: Diffusion, Argon ion lasers, Reflection, Bidirectional reflectance transmission function, Lanthanum, Polarization, Physics, Signal detection, Contamination, Information operations

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Proceedings Article | 3 April 2018 Open Access

Microfabrication of high performance optical diaphragm by plasma ion beam etching technology

Agnes Mestreau, Henri Bernardet, Guy Dancoing, Xavier Godechot, Christian Pezant, Vincent Stenger, Bernard Cousin, Pierre Etcheto, Georges Otrio

Proceedings Volume 10570, 1057023 (2018) https://doi.org/10.1117/12.2326629

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Proceedings Article | 3 April 2018 Open Access

Maquette fonctlonnelle optique développée dans le cadre du développement exploratoire nouveau télescope

Vincent Albouys, Jacques Berthon, Thierry Bret-Dibat, Pierre Etcheto, David Laubier, Karine Mercier, Didier Nadalin, Lionel Perret

Proceedings Volume 10570, 105700C (2018) https://doi.org/10.1117/12.2326443

KEYWORDS: Astronomical imaging

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Proceedings Article | 3 April 2018 Open Access

Fond de ciel stratosphérique mesure par le senseur stellaire de PRONAOS

Pierre Etcheto

Proceedings Volume 10570, 105701N (2018) https://doi.org/10.1117/12.2326561

KEYWORDS: Diffusion, Lanthanum, Cerium, Telescopes, Aerosols, Gold, Charge-coupled devices, Stratosphere, Sensors, Liquid crystals

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Proceedings Article | 21 November 2017 Open Access

Probing the hermean exosphere by ultraviolet spectroscopy (PHEBUS): optical simulation of an ultraviolet spectrometer

Nicolas Rouanet, Carole Gouvret, Christian Buil, Pierre Etcheto, Jean-Luc Maria, Jean-Jacques Correia, Jean-Pierre Goutail, François Leblanc, Eric Quémerais, Philippe-Jean Hébert, Eric Chassefiere

Proceedings Volume 10567, 105671S (2017) https://doi.org/10.1117/12.2308071

KEYWORDS: Sensors, Nickel, Aluminum, Iron, Extreme ultraviolet, Spectroscopy, Exosphere, Calcium, Ultraviolet radiation, Mercury (planet)

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Proceedings Article | 21 November 2017 Open Access

Stray light in Picard telescope

Pierre Etcheto, Anne Macaire

Proceedings Volume 10569, 105691N (2017) https://doi.org/10.1117/12.2307923

KEYWORDS: Sun, Image filtering, Sensors, Optical filters, Mirrors, Stray light, Reflectivity, Bidirectional reflectance transmission function, Ultraviolet radiation, Coating

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Proceedings Article | 21 November 2017 Open Access

Development of black scattering coatings for space application (etude de traitements noirs diffusants pour application spatiale)

Agnes Mestreau-GARREAU, Christian Pezant, Bernard Cousin, Pierre Etcheto, Georges Otrio

Proceedings Volume 10569, 105690D (2017) https://doi.org/10.1117/12.2307943

KEYWORDS: Scattering, Optical coatings, Copper, Aluminum, Oxidation, Nickel, Oxides, Polishing, Optical testing, Optical inspection

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Proceedings Article | 21 November 2017 Open Access

Highly light-weighted ZERODUR mirrors

Stéphanie Behar-Lafenetre, Thierry Lasic, Roger Viale, Jean-Claude Mathieu, Eric Ruch, Michel Tarreau, Pierre Etcheto

Proceedings Volume 10566, 105660O (2017) https://doi.org/10.1117/12.2308286

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Proceedings Article | 20 November 2017 Open Access

Technological development of multispectral filter assemblies for micro bolometer

Roland Le Goff, François Tanguy, Philippe Fuss, Pierre Etcheto

Proceedings Volume 10564, 105640P (2017) https://doi.org/10.1117/12.2309068

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Proceedings Article | 17 November 2017 Open Access

Absorbing coating in magnetron sputtering for parasitic light reduction

C. Grèzes-Besset, H. Krol, G. Chauveau, D. Stojcevski, C. Bondet de la Bernardie, M. Zerrad, S. Liukaityte, M. Lequime, C. Amra, P. Etcheto, I. Savin De Larclause, M. Tatat

Proceedings Volume 10563, 1056307 (2017) https://doi.org/10.1117/12.2304201

KEYWORDS: Coating, Scattering, Light scattering, Multilayers, Refractive index, Sputter deposition, Astronomical imaging, Aluminum, Reflectivity, Transmittance

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Proceedings Article | 25 September 2017 Open Access

Characterization of diffraction gratings scattering in uv and ir for space applications

Sakina Achour, Quentin Kuperman-Le Bihan, Pierre Etcheto

Proceedings Volume 10562, 1056205 (2017) https://doi.org/10.1117/12.2296091

KEYWORDS: Scattering, Diffraction gratings, Ultraviolet radiation, Light scattering, Bidirectional reflectance transmission function, Autoregressive models, Sensors, Reflectivity, Visible radiation, Astronomical imaging

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The use of Bidirectional Scatter Distribution Function (BSDF) in space industry and especially when designing telescopes is a key feature. Indeed when speaking about space industry, one can immediately think about stray light issues. Those important phenomena are directly linked to light scattering. Standard BSDF measurement goniophotometers often have a resolution of about 0.1° and are mainly working in or close to the visible spectrum. This resolution is far too loose to characterize ultra-polished surfaces. Besides, wavelength range of BSDF measurements for space projects needs to be done far from visible range. How can we measure BSDF of ultra-polished surfaces and diffraction gratings in the UV and IR range with high resolution? We worked on developing a new goniophometer bench in order to be able to characterize scattering of ultra-polished surfaces and diffraction gratings used in everyday space applications. This ten meters long bench was developed using a collimated beam approach as opposed to goniophotometer using focused beam. Sources used for IR characterization were CO2 (10.6?m) and Helium Neon (3.39?m) lasers. Regarding UV sources, a collimated and spatially filtered UV LED was used. The detection was ensure by a photomultiplier coupled with synchronous detection as well as a MCT InSb detector. The so-built BSDF measurement instrument allowed us to measure BSDF of ultra-polished surfaces as well as diffraction gratings with an angular resolution of 0.02° and a dynamic of 1013 in the visible range. In IR as well as in UV we manage to get 109 with same angular resolution of 0.02°. The 1m arm and translation stages allows us to measure samples up to 200mm. Thanks to such a device allowing ultra-polished materials as well as diffraction gratings scattering characterization, it is possible to implement those BSDF measurements into simulation software and predict stray light issues. This is a big help for space industry engineers to apprehend stray light due to surface finishes and to delete those effects before the whole project is done. We are now thinking of possible improvement on our optical bench to try to get dynamic in IR and UV similar to what we have in visible range (e.g. 1013).

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Proceedings Article | 25 September 2017 Open Access

Pilot optical alignment and its in flight performances

B. Mot, Y. Longval, P. Ade, Y. André, J. Aumont, L. Baustista, J.-Ph. Bernard, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A Caillat, M. Charra, M. Chaigneau, C. Coudournac, B. Crane, J.-P. Crussaire, F. Douchin, E. Doumayrou, J. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B Leriche, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, J. Narbonne, J.-M. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J.-P. Torre, C. Tucker, G. Versepuech

Proceedings Volume 10562, 105624C (2017) https://doi.org/10.1117/12.2297590

KEYWORDS: Mirrors, Telescopes, Space telescopes, Optical alignment, Photometry, Astronomical imaging, Point spread functions, Thermography, Image quality, Thermal modeling

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Proceedings Article | 15 May 2017 Presentation + Paper

Study of performance loss of Lyman alpha filters due to chemical contamination

Delphine Faye, Xueyan Zhang, Pierre Etcheto, Frédéric Auchère

Proceedings Volume 10236, 102360F (2017) https://doi.org/10.1117/12.2265864

KEYWORDS: Contamination, Vacuum ultraviolet, Ultraviolet radiation, Imaging systems, Chemical analysis, Extreme ultraviolet, Sun, Absorption, Magnesium fluoride, Optical components, Optical filters, Solar processes, Diagnostics, Stars, Space telescopes

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Proceedings Article | 29 July 2016 Paper

PILOT optical alignment

Y. Longval, B. Mot, P. Ade, Y. André, J. Aumont, L. Baustista, J.-Ph. Bernard, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A. Caillat, M. Charra, M. Chaigneau, B. Crane, J.-P. Crussaire, F. Douchin, E. Doumayrou, J.-P. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P.. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B. Leriche, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, J. Narbonne, J-M. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J.-P. Torre, C. Tucker

Proceedings Volume 9904, 990458 (2016) https://doi.org/10.1117/12.2232892

KEYWORDS: Optical alignment, 3D metrology, Space telescopes, Mirrors, Photometry, Telescopes, Thermography, Spherical lenses, Thermal modeling, Point spread functions

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Proceedings Article | 19 July 2016 Paper

Inflight performance of the PILOT balloon-borne experiment

J.-Ph. Bernard, P. Ade, Y. André, J. Aumont, L. Bautista, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A. Caillat, M. Charra, M. Chaigneau, B. Crane, J.-P. Crussaire, F. Douchin, E. Doumayrou, J. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B. Leriche, Y. Longval, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, B. Mot, J. Narbonne, J-M. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J.-P. Torre, C. Tucker

Proceedings Volume 9914, 99140W (2016) https://doi.org/10.1117/12.2231872

KEYWORDS: Polarization, Astronomy, Sensors, Calibration, Staring arrays, Point spread functions, Bolometers, Saturn, Sun, Signal detection

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Proceedings Article | 3 October 2011 Paper

Recent developments of multispectral filter assemblies for CCD, CMOS and bolometer

Roland Le Goff, Bruno Badoil, Philippe Fuss, François Tanguy, Pierre Etcheto

Proceedings Volume 8176, 817618 (2011) https://doi.org/10.1117/12.898971

KEYWORDS: Optical filters, Sensors, Bolometers, Image filtering, Thin film coatings, Semiconducting wafers, Manufacturing, Charge-coupled devices, Opacity, Infrared radiation

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Proceedings Article | 13 September 2011 Paper

Stray light in PICARD SODISM instrument: design, check, flight results, and alignment issues

P. Etcheto, M. Meftah, M. Meissonnier, A. Irbah, P. Assus, G. Thuillier

Proceedings Volume 8131, 81310K (2011) https://doi.org/10.1117/12.896434

KEYWORDS: Sun, Sensors, Mirrors, Coating, Optical filters, Image filtering, Tolerancing, Electronic filtering, Reflectivity, Attenuators

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Proceedings Article | 18 February 2004 Paper

Coherent modeling and stray light in a static Fourier transform spectrometer

Pierre Etcheto, Alain Rosak, Philippe Parant, Odile Vigier

Proceedings Volume 5249, (2004) https://doi.org/10.1117/12.512826

KEYWORDS: Mirrors, Sensors, Stray light, Interferometers, Modeling, Spectroscopy, Ray tracing, Spectral resolution, Fourier transforms, Absorption

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Proceedings Article | 28 December 1999 Paper

Tests of a high-resolution three-mirror anastigmat telescope

Thierry Bret-Dibat, Vincent Albouys, Jacques Berthon, N. Bouzou, Pierre Etcheto, David Laubier, K. Mercier

Proceedings Volume 3870, (1999) https://doi.org/10.1117/12.373170

KEYWORDS: Mirrors, Telescopes, Sensors, Space telescopes, Modulation transfer functions, Finite element methods, Interfaces, Manufacturing, Optical alignment, Image quality

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Proceedings Article | 13 September 1994 Paper

Cold box subsystem for the infrared atmospheric sounding interferometer instrument (IASI): payload for the METOP-1 ESA polar platform

Michel Royer, Bruno Fauquier, Jean Feuvrier, Pierre Froissart, Pierre Etcheto, Christian Buil

Proceedings Volume 2209, (1994) https://doi.org/10.1117/12.185258

KEYWORDS: Sensors, Optics manufacturing, Microlens, Objectives, Manufacturing, Mercury cadmium telluride, Infrared radiation, Interferometers, Tolerancing, Packaging

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