Dr. Luis Miguel Gaspar Venancio Profile

Dr. Luis Miguel Gaspar Venancio

Optical Payload Study Lead at ESTEC

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 12 July 2023 Open Access

An account of the Euclid payload module test results

Luis Gaspar Venancio, René Laureijs, Giuseppe Racca, Elena Maiorano, Alex Short, Tobias Boenke, Paolo Strada, Magdalena Szafraniec, Roland Vavrek

Proceedings Volume 12777, 127776H (2023) https://doi.org/10.1117/12.2691130

KEYWORDS: Telescopes, Equipment, Point spread functions, Astronomical imaging, Thermal stability, Collimators, Thermography, Optical alignment, Mirrors, Image quality

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 12 July 2023 Open Access

Setup for high-precision wavefront measurements: design and technical limitations

Chris Britze, Michael Vergöhl, Thomas Melzig, Stefan Bruns, Philipp Henning, Hans-Ulrich Kricheldorf, Luis Miguel Gaspar Venancio

Proceedings Volume 12777, 1277765 (2023) https://doi.org/10.1117/12.2691116

KEYWORDS: Wavefront errors, Wavefronts, Sensors, Beam splitters, Wavefront sensors, Reflection, Polarizers, Mirrors, Design and modelling, Point spread functions

Read Abstract +

In broadband dielectric coatings, the wavefront of the reflected wave can change dramatically in a resonance-like manner as a function of wavelength. These wavefront errors can be a significant issue in high precision instruments. In the last years, effort has been undertaken to design and produce coatings to reduce these resonances. However, today there is still limited capability to characterize by measurement the spectral dependence of the wavefront error with high spectral resolution and accuracy. The goal of this paper is to present and analyze a design for a setup to measure the reflected wavefront from a coated flat component with high accuracy as a function of the wavelength. The proposed design is based on a passive system using high-precision off-axis parabolic mirrors. For sensing the wavefront error a Shack-Hartmann sensor is proposed, whose microlens array design is to be modified. According to error analysis and tolerance studies, the setup is capable of measuring wavefront distortion with sub-2 nm RMS accuracy within 510 nm to 950 nm. The angle of incidence and the polarization can also be varied without a loss of accuracy. In order to determine the point spread function (PSF) with high accuracy in addition to the wavefront measurement, the wavefront error of the setup itself needs to be below 50 nm RMS. The tolerancing performed in this study included the light source, shape errors of the mirrors, beam splitter, polarizers, and the sensors. Shape irregularities of the single elements were simulated by Zernike polynomials, and the residual wavefront error of the setup is estimated by Monte Carlo simulations, including uncertainties of the mechanical positioning. From these simulations, specifications for the mirrors have been worked out based on the goal of a system wavefront error lower than 50 nm RMS. The intended broad spectral range makes it challenging to identify a suitable Shack-Hartmann wavefront sensor. Different sensor configurations are evaluated experimentally, and a reproducible wavefront measurement can be achieved by adjusting the focal length of the microlens array. Thereby, the repeatability in wavefront measurements could be reduced from 3 nm to less than 1 nm RMS by modifying the microlens array parameters. Tilting the polarizer and beam splitter by 2° prevents ghost images and multiple reflections in the setup. Finally, considerations about the realization of a suitable reference measurement with an optical flat of sufficient surface quality are presented.

DOWNLOAD PAPER

Proceedings Article | 27 August 2022 Poster + Paper

Measurement and modelling of the chromatic dependence of a reflected wavefront on the Euclid space telescope dichroic mirror

M. Baron, B. Sassolas, P.-A. Frugier, L. Gaspar Venancio, J. Amiaux, M. Castelnau, F. Keller, G. Dovillaire, P. Treimany, R. Juvénal, L. Miller, L. Pinard, A. Ealet

Proceedings Volume 12180, 121804V (2022) https://doi.org/10.1117/12.2630072

KEYWORDS: Point spread functions, Optical coatings, Mirrors, Phase shifts, Polarization, Wavefronts, Reflectivity, Metrology, Thin films, Wavefront aberrations, Space telescopes, Dichroic splitting

Read Abstract +

Proceedings Article | 15 December 2020 Paper

Status of the performance of the Euclid spacecraft

Luis Gaspar Venancio, Lionel Carminati, Jérôme Amiaux, Luciana Bonino, Giuseppe Racca, Roland Vavrek, René Laureijs, Alex Short, Tobias Boenke, Paolo Strada

Proceedings Volume 11443, 114430G (2020) https://doi.org/10.1117/12.2562490

KEYWORDS: Space operations, Galactic astronomy, Baryon acoustic oscillations, Image quality, Image segmentation, Acoustics, Distortion, Image quality standards, Imaging systems, Optical imaging

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

Euclid mission status after mission critical design

R. Laureijs, G. Racca, Y. Mellier, P. Musi, L. Brouard, T. Böenke, L. Gaspar Venancio, E. Maiorano, A. Short, P. Strada, B. Altieri, G. Buenadicha, X. Dupac, P. Gomez Alvarez, J. Hoar, R. Kohley, R. Vavrek, A. Rudolph, M. Schmidt, J. Amiaux, H. Aussel, M. Berthé, M. Cropper, J.-C. Cuillandre, C. Dabin, J. Dinis, R. Nakajima, T. Maciaszek, R. Scaramella, A. da Silva, I. Tereno, O. Williams, A. Zacchei, R. Azzollini, F. Bernardeau, J. Brinchmann, C. Brockley-Blatt, F. Castander, A. Cimatti, C. Conselice, A. Ealet, P. Fosalba, W. Gillard, L. Guzzo, H. Hoekstra, P. Hudelot, K. Jahnke, T. Kitching, L. Miller, J. Mohr, W. Percival, V. Pettorino, J. Rhodes, A. Sanchez, M. Sauvage, S. Serrano, R. Teyssier, J. Weller, J. Zoubian

Proceedings Volume 11443, 114430F (2020) https://doi.org/10.1117/12.2563145

KEYWORDS: Image segmentation, Galactic astronomy, Data acquisition, Aerospace engineering, Space operations, Telescopes, Image quality, Point spread functions, Calibration, Photometry

Read Abstract +

Proceedings Article | 11 January 2018 Open Access

The SPICA Telescope: design evolution and expected performance

L. Gaspar Venancio, D. Doyle, K. Isaak, T. Onaka, H. Kaneda, T. Nakagawa, H. Matsuhara, N. Takahashi, T. Yamawaki

Proceedings Volume 10565, 1056555 (2018) https://doi.org/10.1117/12.2309162

KEYWORDS: Mirrors, Computer aided design, Space telescopes, Telescopes, Optical instrument design, Optical design, Point spread functions, Astronomical imaging, Diffraction, Optics manufacturing

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 21 November 2017 Open Access

Dynamic diffraction gratings and a spectrometer demonstrator

Ville-Veikko Aallos, Rami Mannila, Heikki Saari, Kai Viherkanto, Luis Venancio

Proceedings Volume 10566, 1056606 (2017) https://doi.org/10.1117/12.2308295

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 21 November 2017 Open Access

Programmable spectrometer using MOEMs devices for space applications

Thierry Viard, Christophe Buisset, Xavier Rejeaunier, Frédéric Zamkotsian, Luis Venancio

Proceedings Volume 10566, 105662A (2017) https://doi.org/10.1117/12.2308280

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 November 2017 Open Access

Investigation on high efficiency volume Bragg gratings performances for spectrometry in space environment

Jérôme Loicq, Y. Stockman, Marc Georges, Luis Gaspar Venancio

Proceedings Volume 10564, 105642T (2017) https://doi.org/10.1117/12.2309051

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 November 2017 Open Access

SWIFTS: on-chip very high spectral resolution spectrometer

E. le Coarer, L. Venancio, P. Kern, J. Ferrand, P. Puget, M. Ayraud, C. Bonneville, B. Demonte, A. Morand, J. Boussey, D. Barbier, S. Blaize, T. Gonthiez

Proceedings Volume 10565, 105651B (2017) https://doi.org/10.1117/12.2309259

KEYWORDS: Waveguides, Spectroscopy, Spectral resolution, Sensors, Fourier transforms, Visible radiation, Mirrors, Astronomical imaging, Earth's atmosphere, Atmospheric sensing

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 17 November 2017 Open Access

Design, realization and characterization of the dichroic for Euclid

F. Belli, C. Cicciarelli, P. Laganà, G. Taglioni, L. M. G. Venancio, Bernd Harnisch

Proceedings Volume 10563, 105634X (2017) https://doi.org/10.1117/12.2304071

KEYWORDS: Coating, Reflection, Optical filters, Astronomical imaging, Temperature metrology, Near infrared, Antireflective coatings, Silica, Space telescopes, Cryogenics

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 18 August 2016 Paper

Model-based system engineering approach for the Euclid mission to manage scientific and technical complexity

Jose Lorenzo Alvarez, Harold Metselaar, Jerome Amiaux, Gonzalo Saavedra Criado, Luis Gaspar Venancio, Jean-Christophe Salvignol, René Laureijs, Roland Vavrek

Proceedings Volume 9911, 99110C (2016) https://doi.org/10.1117/12.2231373

KEYWORDS: Systems engineering, Systems modeling, Space operations, Modeling, Galactic astronomy, Control systems, Systems engineering, Systems modeling, Data modeling, Data processing, Atrial fibrillation, Visualization

Read Abstract +

Proceedings Article | 16 August 2016 Paper

Mission-level performance verification approach for the Euclid space mission

Roland Vavrek, René Laureijs, Jose Lorenzo Alvarez, Jérôme Amiaux, Yannick Mellier, Ruyman Azzollini, Guillermo Buenadicha, Gonzalo Saavedra Criado, Mark Cropper, Christophe Dabin, Anne Ealet, Bianca Garilli, Anna Gregorio, Henk Hoekstra, Knud Jahnke, Martin Kilbinger, Tom Kitching, John Hoar, Will Percival, Giuseppe Racca, Jean-Christophe Salvignol, Marc Sauvage, Roberto Scaramella, Luis Gaspar Venancio, Yun Wang, Andrea Zacchei, Stefanie Wachter

Proceedings Volume 9911, 991105 (2016) https://doi.org/10.1117/12.2233015

KEYWORDS: Space operations, Galactic astronomy, Spectroscopy, Systems modeling, Databases, Point spread functions, Seaborgium, Data processing, Calibration, Telescopes

Read Abstract +

Proceedings Article | 29 July 2016 Paper

Coating induced phase shift and impact on Euclid imaging performance

Luis Gaspar Venancio, Lionel Carminati, Jose Lorenzo Alvarez, Jérôme Amiaux, Luciana Bonino, Jean-Christophe Salvignol, Roland Vavrek, René Laureijs, Alex Short, Tobias Boenke, Paulo Strada

Proceedings Volume 9904, 99040V (2016) https://doi.org/10.1117/12.2232842

KEYWORDS: Space telescopes, Phase shifts, Image quality, Coating, Telescopes, Mathematical modeling, Reflectivity, Point spread functions, Reflection, Design for manufacturability

Read Abstract +

Proceedings Article | 19 July 2016 Paper

The Euclid mission design

Giuseppe Racca, René Laureijs, Luca Stagnaro, Jean-Christophe Salvignol, José Lorenzo Alvarez, Gonzalo Saavedra Criado, Luis Gaspar Venancio, Alex Short, Paolo Strada, Tobias Bönke, Cyril Colombo, Adriano Calvi, Elena Maiorano, Osvaldo Piersanti, Sylvain Prezelus, Pierluigi Rosato, Jacques Pinel, Hans Rozemeijer, Valentina Lesna, Paolo Musi, Marco Sias, Alberto Anselmi, Vincent Cazaubiel, Ludovic Vaillon, Yannick Mellier, Jérôme Amiaux, Michel Berthé, Marc Sauvage, Ruyman Azzollini, Mark Cropper, Sabrina Pottinger, Knud Jahnke, Anne Ealet, Thierry Maciaszek, Fabio Pasian, Andrea Zacchei, Roberto Scaramella, John Hoar, Ralf Kohley, Roland Vavrek, Andreas Rudolph, Micha Schmidt

Proceedings Volume 9904, 99040O (2016) https://doi.org/10.1117/12.2230762

KEYWORDS: Data processing, Galactic astronomy, Space operations, Telescopes, Point spread functions, K band, Sensors, Image quality, Data archive systems, Calibration

Read Abstract +

Proceedings Article | 19 July 2016 Paper

Euclid end-to-end straylight performance assessment

Luis M. Gaspar Venancio, Charlotte Pachot, Lionel Carminati, Jose Lorenzo Alvarez, Jérôme Amiaux, Eric Prieto, Luciana Bonino, Jean-Christophe Salvignol, Alex Short, Tobias Boenke, Paulo Strada, Rene Laureijs

Proceedings Volume 9904, 99040P (2016) https://doi.org/10.1117/12.2232916

KEYWORDS: Space telescopes, Telescopes, Contamination, Mirrors, Sensors, Scattering, Optical components, Photometry, Contamination control, Picture Archiving and Communication System

Read Abstract +

Proceedings Article | 2 August 2014 Paper

Euclid payload module: telescope characteristics and technical challenges

Luis Gaspar Venancio, René Laureijs, Jose Lorenzo, J. Salvignol, Alex Short, Paolo Strada, Roland Vavrek, Ludovic Vaillon, Corrado Gennaro, Jerome Amiaux, Éric Prieto

Proceedings Volume 9143, 91430I (2014) https://doi.org/10.1117/12.2054768

KEYWORDS: Telescopes, Space telescopes, Galactic astronomy, Point spread functions, Mirrors, Image quality, Coating, Baryon acoustic oscillations, Reflection, Imaging spectroscopy

Read Abstract +

Proceedings Article | 2 August 2014 Paper

Euclid mission status

R. Laureijs, G. Racca, L. Stagnaro, J.-C. Salvignol, J. Lorenzo Alvarez, G. Saavedra Criado, L. Gaspar Venancio, A. Short, P. Strada, C. Colombo, G. Buenadicha, J. Hoar, R. Kohley, R. Vavrek, Y. Mellier, M. Berthe, J. Amiaux, M. Cropper, S. Niemi, S. Pottinger, A. Ealet, K. Jahnke, T. Maciaszek, F. Pasian, M. Sauvage, S. Wachter, U. Israelsson, W. Holmes, M. Seiffert, V. Cazaubiel, A. Anselmi, P. Musi

Proceedings Volume 9143, 91430H (2014) https://doi.org/10.1117/12.2054883

KEYWORDS: Space operations, Space telescopes, Telescopes, Galactic astronomy, Sensors, Calibration, Seaborgium, Mirrors, Data processing, Imaging spectroscopy

Read Abstract +

Proceedings Article | 23 July 2014 Paper

The Euclid VIS CCD detector design, development, and programme status

A. Short, D. Barry, M. Berthe, N. Boudin, O. Boulade, R. Cole, M. Cropper, L. Duvet, J. Endicott, L. Gaspar Venancio, J. Gow, P. Guttridge, D. Hall, A. Holland, H. Israel, R. Kohley, R. Laureijs, J. Lorenzo Alvarez, J. Martignac, J. Maskell, R. Massey, N. Murray, S.-M. Niemi, P. Pool, S. Pottinger, T. Prod'homme, G. Racca, J-C Salvignol, W. Suske, M. Szafraniec, P. Verhoeve, D. Walton, R. Wheeler

Proceedings Volume 9154, 91540R (2014) https://doi.org/10.1117/12.2057587

KEYWORDS: Charge-coupled devices, Clocks, Electrons, Modulation transfer functions, Silicon carbide, Quantum efficiency, Sensors, Galactic astronomy, CCD image sensors, Calibration

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Status of the assessment phase of the ESA M3 mission candidate EChO

L. Puig, K. Isaak, M. Linder, I. Escudero, Didier Martin, P.-E. Crouzet, L. Gaspar Venancio, A. Zuccaro Marchi

Proceedings Volume 8442, 844206 (2012) https://doi.org/10.1117/12.925368

KEYWORDS: Telescopes, Planets, Space telescopes, Exoplanets, Stars, Mirrors, Spectroscopy, Optical instrument design, Space operations, Atmospheric modeling

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Investigation on the high efficiency volume Bragg gratings performances for spectrometry in space environment: preliminary results

Jérôme Loicq, Luis Miguel Gaspar Venancio, Marc Georges

Proceedings Volume 8442, 84424Z (2012) https://doi.org/10.1117/12.925409

KEYWORDS: Diffraction gratings, Diffraction, Polarization, Spectroscopy, Scattering, Fiber Bragg gratings, Light scattering, Glasses, Laser scattering, Near infrared

Read Abstract +

Proceedings Article | 1 May 2012 Paper

Polarization scrambling with metallic meander structures for space applications

Philipp Schau, Liwei Fu, Karsten Frenner, Heinz Schweizer, Martin Schäferling, Thomas Weiss, Harald Giessen, Luis Miguel Gaspar Venancio, Sandro Hannemann, Wolfgang Osten

Proceedings Volume 8423, 842314 (2012) https://doi.org/10.1117/12.924051

KEYWORDS: Polarization, Terahertz radiation, Transmittance, Plasmonics, Optical components, Aerospace engineering, Metamaterials, Metals, Phase shifts, Linear polarizers

Read Abstract +

Proceedings Article | 15 September 2011 Paper

Metamaterials for optical and photonic applications for space: preliminary results

L. M. Gaspar Venancio, S. Hannemann, G. Lubkowski, M. Suhrke, H. Schweizer, L. Fu, H. Giessen, P. Schau, K. Frenner, W. Osten

Proceedings Volume 8146, 81460E (2011) https://doi.org/10.1117/12.893110

KEYWORDS: Metamaterials, Polarization, Absorption, Aerospace engineering, Optical filters, Polarization control, Manufacturing, Space telescopes, Beam splitters, Antireflective coatings

Read Abstract +

Proceedings Article | 18 February 2011 Paper

MOEMS for prospective space applications

Thierry Viard, Christophe Buisset, Frederic Zamkotsian, Vincent Costes, Luis Venancio

Proceedings Volume 7928, 79280I (2011) https://doi.org/10.1117/12.874665

KEYWORDS: Microopto electromechanical systems, Spectroscopy, Convolution, Sensors, Optical filters, Digital micromirror devices, Mirrors, Optical design, CCD cameras, Micromirrors

Read Abstract +

Proceedings Article | 12 July 2008 Paper

Programmable spectrometer using MOEMS devices for space applications

Thierry Viard, Christophe Buisset, Xavier Rejeaunier, Frédéric Zamkotsian, Luis M. G. Venancio

Proceedings Volume 7010, 701048 (2008) https://doi.org/10.1117/12.789255

KEYWORDS: Spectroscopy, Sensors, Microopto electromechanical systems, Point spread functions, Mirrors, Diffraction gratings, Diffraction, Spectrometer engineering, Spectral resolution, Infrared spectroscopy

Read Abstract +

Proceedings Article | 15 September 2006 Paper

Interferogram stitching applied to the surface metrology of millimeter-wave and micrometer-wave reflectors

S. Roose, Y. Houbrechts, A. Mazzoli, Y. Stockman, N. Ninane, R. Daddato, V. Kirschner, L. Venancio, D. de Chambure

Proceedings Volume 6341, 63412W (2006) https://doi.org/10.1117/12.695995

KEYWORDS: Reflectors, Interferometers, Cameras, Interferometry, Sensors, Cryogenics, Metrology, Temperature metrology, Microwave radiation, Manufacturing

Read Abstract +

Showing 5 of 26 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years