Dr. Jerome M. Vaillant Profile

Dr. Jerome M. Vaillant

at CEA-LETI

SPIE Involvement:

Author

Area of Expertise:

CMOS image sensor , Optical simulation , Wavefront sensor , Adaptive Optics

Publications (20)

Proceedings Article | 15 March 2023 Presentation + Paper

Bloch mode analysis of subwavelength polarizing planar optics

R. Mulin, F. Deneuville, O. Jeannin, M. Boffety, J. Vaillant

Proceedings Volume 12432, 1243204 (2023) https://doi.org/10.1117/12.2646194

KEYWORDS: Optical gratings, Silicon, Polarization, Wave propagation, Image processing, Refractive index, Immersion lithography, Data modeling, Semiconducting wafers, CMOS sensors

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Proceedings Article | 14 September 2021 Presentation + Paper

Deep learning applied to quad-pixel plenoptic images

Guillaume Chataignier, Benoit Vandame, Jerome Vaillant

Proceedings Volume 11875, 1187505 (2021) https://doi.org/10.1117/12.2597001

KEYWORDS: Sensors, Diffraction, Microlens, Convolution, Image processing, Image acquisition, Ray tracing, Finite-difference time-domain method

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Proceedings Article | 26 March 2019 Paper

Beyond contrast curve approach: a grayscale model applied to sub-5µm patterns

Pierre Chevalier, Patrick Quéméré, Charlotte Beylier, Sébastien Bérard-Bergery, Nacima Allouti, Marion Paris, Vincent Farys, Jérôme Vaillant

Proceedings Volume 10958, 109581E (2019) https://doi.org/10.1117/12.2514234

KEYWORDS: Photomasks, Chromium, Microlens, 3D modeling, Atomic force microscopy, Grayscale lithography, Lithography, Photoresist processing, Diffraction, Microlens array

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Proceedings Article | 24 May 2018 Presentation + Paper

Color correction matrix for sparse RGB-W image sensor without IR cutoff filter

J. Vaillant, A. Clouet, D. Alleysson

Proceedings Volume 10677, 1067704 (2018) https://doi.org/10.1117/12.2306123

KEYWORDS: Sensors, Signal to noise ratio, Image sensors, Reflectivity, Near infrared, Databases

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Proceedings Article | 24 January 2011 Paper

Characterization of pixel crosstalk and impact of Bayer patterning by quantum efficiency measurement

Jérôme Vaillant, Clémence Mornet, Thomas Decroux, Didier Hérault, Isabelle Schanen

Proceedings Volume 7876, 787613 (2011) https://doi.org/10.1117/12.879603

KEYWORDS: Optical filters, Quantum efficiency, Optical lithography, Transistors, Silicon, Sensors, Image resolution, Optical resolution, Image sensors, Metals

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Proceedings Article | 24 January 2011 Paper

Toward a quantitative visual noise evaluation of sensors and image processing pipes

Clémence Mornet, Donald Baxter, Jérôme Vaillant, Thomas Decroux, Didier Herault, Isabelle Schanen

Proceedings Volume 7876, 78760Q (2011) https://doi.org/10.1117/12.870828

KEYWORDS: Signal to noise ratio, Visualization, Sensors, Image processing, Cameras, RGB color model, Optical resolution, Image resolution, Image sensors, Colorimetry

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Proceedings Article | 24 January 2011 Paper

An image quality evaluation tool simulating image sensors including quantum efficiency off-axis effect

Clémence Mornet, Jérôme Vaillant, Thomas Decroux, Nicolas Virollet, Didier Herault, Isabelle Schanen

Proceedings Volume 7876, 78760M (2011) https://doi.org/10.1117/12.871344

KEYWORDS: Quantum efficiency, Sensors, Image sensors, Image quality, Image processing, Signal to noise ratio, Device simulation, Cameras, Microlens, CMOS sensors

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Proceedings Article | 6 May 2010 Paper

Finite-difference time domain based electro-optical methodologies to improve CMOS image sensor pixels performances

Flavien Hirigoyen, Axel Crocherie, Pierre Boulenc, Jérôme Vaillant, Clément Tavernier, Didier Hérault

Proceedings Volume 7723, 772318 (2010) https://doi.org/10.1117/12.854546

KEYWORDS: Quantum efficiency, Sensors, Silicon, Doping, CMOS sensors, 3D modeling, Electro optics, Optical simulations, Electro optical modeling, Electrons

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Proceedings Article | 30 March 2010 Paper

Grayscale lithography process study applied to zero-gap microlenses for sub-2μm CMOS image sensors

S. Audran, J. Vaillant, V. Farys, F. Hirigoyen, E. Huss, B. Mortini, C. Cowache, L. Berthier, E. Mortini, J. Fantuz, O. Arnaud, L. Depoyan, F. Sundermann, C. Baron, J.-P. Reynard

Proceedings Volume 7639, 763910 (2010) https://doi.org/10.1117/12.846507

KEYWORDS: Microlens, Photomasks, Calibration, Spherical lenses, Atomic force microscopy, Grayscale lithography, Image processing, Photoresist processing, Photoresist materials, Diffusion

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Proceedings Article | 19 January 2010 Paper

Evaluation of color error and noise on simulated images

Clémence Mornet, Jérôme Vaillant, Thomas Decroux, Didier Hérault, Isabelle Schanen

Proceedings Volume 7537, 75370Y (2010) https://doi.org/10.1117/12.853669

KEYWORDS: Signal to noise ratio, Sensors, Reflectivity, Image processing, Image quality, RGB color model, Cameras, Quantum efficiency, Human-machine interfaces, Interference (communication)

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Proceedings Article | 27 September 2008 Paper

Three-dimensional broadband FDTD optical simulations of CMOS image sensor

A. Crocherie, J. Vaillant, F. Hirigoyen

Proceedings Volume 7100, 71002J (2008) https://doi.org/10.1117/12.797417

KEYWORDS: Silicon, Sensors, Photodiodes, Finite-difference time-domain method, CMOS sensors, Microlens, Interfaces, Quantum efficiency, Optical simulations, 3D modeling

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Proceedings Article | 12 March 2008 Paper

Versatile method for optical performances characterization of off-axis CMOS pixels with microlens radial shift

Jérôme Vaillant, Thomas Decroux, Emilie Huss, Frédéric Barbier, Didier Hérault, Flavien Hirigoyen, Nicolas Virollet

Proceedings Volume 6817, 681707 (2008) https://doi.org/10.1117/12.766463

KEYWORDS: Sensors, Microlens, Optical filters, Objectives, Image sensors, Diffusers, Cameras, Vignetting, Light sources, CMOS sensors

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Proceedings Article | 29 February 2008 Paper

FDTD-based optical simulations methodology for CMOS image sensor pixels architecture and process optimization

Flavien Hirigoyen, Axel Crocherie, Jérôme Vaillant, Yvon Cazaux

Proceedings Volume 6816, 681609 (2008) https://doi.org/10.1117/12.766391

KEYWORDS: Finite-difference time-domain method, CMOS sensors, Sensors, Geometrical optics, Optical simulations, Silicon, Radio propagation, Diffraction, Electro optical modeling, 3D modeling

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Proceedings Article | 1 September 2004 Paper

Optical simulation for CMOS imager microlens optimization

Jerome Vaillant, Flavien Hirigoyen

Proceedings Volume 5459, (2004) https://doi.org/10.1117/12.546000

KEYWORDS: Microlens, Optical simulations, Oxides, Computer aided design, Sensors, Computer simulations, 3D modeling, Ray tracing, Vignetting, Solid modeling

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Proceedings Article | 19 February 2004 Paper

Source follower noise limitations in CMOS active pixel sensors

Keith Findlater, Jerome Vaillant, Donald Baxter, Christine Augier, Didier Herault, Robert Henderson, Jed Hurwitz, Lindsay Grant, Jean-Marc Volle

Proceedings Volume 5251, (2004) https://doi.org/10.1117/12.512969

KEYWORDS: Imaging systems, Sensors, Transistors, Cadmium sulfide, Photodiodes, Active sensors, CMOS sensors, Interference (communication), Image sensors, Structural design

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Proceedings Article | 7 February 2003 Paper

Feasibility study of the polychromatic laser guide star

Renaud Foy, Jean-Paul Pique, Veronique Bellanger, Patrick Chevrou, Alain Petit, Claudia Hogemann, Lothar Noethe, Matthias Schock, Julien Girard, Michel Tallon, Eric Thiebaut, Jerome Vaillant, Francoise-C. Foy, Marcos Van Dam

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.460080

KEYWORDS: Telescopes, Sodium, Mesosphere, Laser guide stars, Wavefronts, Modulation, Adaptive optics, Doppler effect, Chemical species, Stars

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Proceedings Article | 17 November 2000 Paper

ELP-OA: measuring the wavefront tilt without a natural guide star

Matthias Schoeck, Jean-Paul Pique, Alain Petit, Patrick Chevrou, Vincent Michau, Gilbert Grynberg, Arnold Migus, Nancy Ageorges, Veronique Bellanger, Francois Biraben, Ruy Deron, Hayden Fews, Francoise-Claude Foy, Claudia Hoegemann, Markus Laubscher, Daniel Mueller, Celine d'Orgeville, Olivier Peillet, Mike Redfern, Renaud Foy, Patricia Segonds, Richard Soden, Michel Tallon, Eric Thiebaut, Andrei Tokovinin, Jerome Vaillant, Jean-Marc Weulersse

Proceedings Volume 4125, (2000) https://doi.org/10.1117/12.409304

KEYWORDS: Telescopes, Stars, Sodium, Wavefronts, Adaptive optics, Modulation, Laser guide stars, Oscillators, Astronomy, Chemical species

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Proceedings Article | 16 August 2000 Paper

Polychromatic guide star: feasibility study

Renaud Foy, Jean-Paul Pique, Alain Petit, Patrick Chevrou, Vincent Michau, Gilbert Grynberg, Arnold Migus, Nancy Ageorges, Veronique Bellanger, Francois Biraben, Ruy Deron, Hayden Fews, Francoise-Claude Foy, Claudia Hoegemann, Markus Laubscher, Daniel Mueller, Celine d'Orgeville, Olivier Peillet, Mike Redfern, Matthias Schoeck, Patricia Segonds, Richard Soden, Michel Tallon, Eric Thiebaut, Andrei Tokovinin, Jerome Vaillant, Jean-Marc Weulersse

Proceedings Volume 4065, (2000) https://doi.org/10.1117/12.407359

KEYWORDS: Telescopes, Sodium, Stars, Oscillators, Adaptive optics, Modulation, Wavefronts, Chemical species, Photons, Laser guide stars

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Adaptive optics at astronomical telescopes aims at correcting in real time the phase corrugations of incoming wavefronts caused by the turbulent atmosphere, as early proposed by Babcock. Measuring the phase errors requires a bright source located within the isoplanatic patch of the program source. The probability that such a reference source exists is a function of the wavelength, of the required image quality (Strehl ratio), of the turbulence optical properties, and of the direction of the observation. It turns out that the sky coverage is disastrously low in particular in the visible wavelength range where, unfortunately, the gain in spatial resolution brought by adaptive optics is the largest. Foy and Labeyrie have proposed to overcome this difficulty by creating an artificial point source in the sky in the direction of the observation relying on the backscattered light due to a laser beam. This laser guide star (hereinafter referred to as LGS) can be bright enough to allow us to accurately measure the wavefront phase errors, except for two modes which are the piston (not relevant in this case) and the tilt. Pilkington has emphasized that the round trip time of the laser beam to the mesosphere, where the LGS is most often formed, is significantly shorter than the typical tilt coherence time; then the inverse-return-of-light principle causes deflections of the outgoing and the ingoing beams to cancel. The apparent direction of the LGS is independent of the tilt. Therefore the tilt cannot be measured only from the LGS. Until now, the way to overcome this difficulty has been to use a natural guide star to sense the tilt. Although the tilt is sensed through the entire telescope pupil, one cannot use a faint source because $APEX 90% of the variance of the phase error is in the tilt. Therefore, correcting the tilt requires a higher accuracy of the measurements than for higher orders of the wavefront. Hence current adaptive optics devices coupled with a LGS face low sky coverage. Several methods have been proposed to get a partial sky coverage for the tilt. The only one providing us with a full sky coverage is the polychromatic LGS (hereafter referred to as PLGS). We present here a progress report of the R&D program Etoile Laser Polychromatique et Optique Adaptative (ELP-OA) carried out in France to develop the PLGS concept. After a short recall of the principles of the PLGS, we will review the goal of ELP-OA and the steps to get over to bring it into play. We finally shortly described the effort in Europe to develop the LGS.

Proceedings Article | 7 July 2000 Paper

ELPOA: toward the tilt measurement from a polychromatic laser guide star

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390401

KEYWORDS: Telescopes, Sodium, Oscillators, Adaptive optics, Modulation, Laser guide stars, Photons, Chemical species, Wavefronts, Atmospheric optics

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Adaptive optics at astronomical telescopes aims at correcting in real time the phase corrugations of incoming wavefronts caused by the turbulent atmosphere, as early proposed by Babcock. Measuring the phase errors requires a bright source, which is located within the isoplanatic patch of the program source. The probability that such a reference source exists is a function of the wavelength of the observation, of the required image quality (Strehl ratio), of the turbulence optical properties, and of the direction of the observation. Several papers have addressed the problem of the sky coverage as a function of these parameters (see e.g.: Le Louarn et al). It turns out that the sky coverage is disastrously low in particular in the short (visible) wavelength range where, unfortunately, the gain in spatial resolution brought by adaptive optics is the largest. Foy and Labeyrie have proposed to overcome this difficulty by creating an artificial point source in the sky in the direction of the observation relying on the backscattered light due to a laser beam. This laser guide star (hereafter referred to as LGS) can be bright enough to allow us to accurately measure the wavefront phase errors, except for two modes which are the piston (which is not relevant in this case) and the tilt. Pilkington has emphasized that the round trip time of the laser beam to the mesosphere, where the LGS is most often formed, is significantly shorter than the typical tilt coherence time; then the inverse-return- of-light principle causes deflections of the outgoing and the ingoing beams to cancel. The apparent direction of the LGS is independent of the tilt. Therefore the tilt cannot be measured only from the LGS. Until now, the way to overcome this difficulty has been to use a natural guide star to sense the tilt. Although the tilt is sensed through the entire telescope pupil, one cannot use a faint source because approximately equals 90% of the variance of the phase error is in the tilt. Therefore, correcting the tilt requires a higher accuracy of the measurements than for higher orders of the wavefront. Hence current adaptive optics devices coupled with a LGS face low sky coverage. Several methods have been proposed to get a partial or total sky coverage for the tilt, such as the dual adaptive optics concept, the elongation perspective method, or the polychromatic LGS (hereafter referred to as PLGS). We present here a progress report of the R&D program Etoile Laser Polychromatique et Optique Adaptative (ELP-OA) carried out in France to develop the PLGS concept. After a short recall of the principles of the PLGS, we will review the goal of ELP-OA and the steps to get over to bring it into play.

Proceedings Article | 7 July 2000 Paper

ELPOA: data processing of chromatic differences of the tilt measured with a polychromatic laser guide star

Jerome Vaillant, Eric Thiebaut, Michel Tallon

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390341

KEYWORDS: Data processing, Laser guide stars, Data modeling, Colorimetry, Charge-coupled devices, Turbulence, Error analysis, Atmospheric propagation, Interference (communication), Image processing

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