Olivier Daigle - Academia.edu (original) (raw)
Papers by Olivier Daigle
The GHASP survey was originally selected to be a subsample complementing the radio survey Westerb... more The GHASP survey was originally selected to be a subsample complementing the radio survey Westerbork survey of HI in SPirals galaxies (WHISP) providing HI distribution and velocity maps for about 400 galaxies (http://www.astro.rug.nl/whisp). The first set of GHASP galaxies was selected from the first WHISP website list but some of them have never been observed by WHISP. (4 data files).
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High Energy, Optical, and Infrared Detectors for Astronomy VI, 2014
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Photonics North 2013, 2013
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Scientific detectors for astronomy 2005
... Philippe Balard1, Philippe Amram1, Olivier Boissin1, Jacques Boulesteix1, Olivier Daigle2, Je... more ... Philippe Balard1, Philippe Amram1, Olivier Boissin1, Jacques Boulesteix1, Olivier Daigle2, Jean-Luc Gach1, Olivia Garrido1, Olivier Hernandez1,2, Michel Marcelin1 1Observatoire de Marseille, 2Laboratoire d ... Photometry, ed. P. Crane & K. Kjär (Garching, ESO), 119. ...
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Biomedical Optics 2014, 2014
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High Energy, Optical, and Infrared Detectors for Astronomy V, 2012
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Observatoire d’Astrophysique de l’Université de Ouagadougou, BP 7021, Ouagadougou 03,
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EAS Publications Series, 2009
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Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 2018
We present the progress in characterization of a Nuv¨ u Cam ¨ eras CCD Controller for Counting Ph... more We present the progress in characterization of a Nuv¨ u Cam ¨ eras CCD Controller for Counting Photons ¯ (CCCP) designed for extreme low light imaging in space environment with the 1024×1024 Teledyne-e2V EMCCD detector (the CCD201-20). The EMCCD controller was designed using space qualified parts before being extensively tested in thermal vacuum. The performance test results include the readout noise, clock-induced charges, dark current, dynamic range and EM gain. We also discuss the CCCP’s integration in the coronagraph of the High-Contrast Imaging Balloon System project: a fine-pointing and optical payload for a future Canadian stratospheric balloon mission. This first space qualified EMCCD controller, named CCCPs, will enhance sensitivity of the future low-light imaging instruments for space applications such as the detection, characterization and imaging of exoplanets, search and monitoring of asteroids and space debris, UV imaging, and satellite tracking.
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Adaptive Optics Systems VI, 2018
HiCIBaS-LOWFS is a spatially modulated pyramid wavefront sensor to be used on the HiCIBaS project... more HiCIBaS-LOWFS is a spatially modulated pyramid wavefront sensor to be used on the HiCIBaS project, a high-contrast imaging balloon borne telescope, as a fine pointing and atmospheric turbulence sensor. Since the project will be using a relatively small telescope on a limited budget, creative solutions must be developed to respond to the requirements for such systems. For example, we need a linear response to large error in order to be able to correct for pointing error in a photon-limited regime caused by the telescope small size. Most solutions aren't well suited for the optical design in HiCIBaS since the high-contrast coronagraph and the Low-Order Wavefront Sensor (LOWFS) both run as separate instruments. The design is centered around the modification of existing pyramid wavefront sensor by adding static, spatial modulation to an otherwise unmodulated system. The spatial modulation is achieved by adding an axicon (a conical optical element) at an imaged telescope pupil plane. This has for effect to add a very large non- common path aberration between the imaging plane and the wavefront sensor. This has for effect to shape the point-spread function incident on the pyramid to a ring shape, which minimize diffraction effect on the apex of imperfect pyramids. We present the first lab results involving the wavefront sensor and its performances for wavefront reconstruction and pointing accuracy. We also discuss the first on-sky results that were recorded with the 1.6-m telescope at the Observatoire du Mont-Megantic in Qubec, Canada using Universite Lavals optical AO test-bench. These results pave the way to the design and integration of the wavefront sensor in the context of the HiCIBaS project.
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Scientific EMCCD cameras are the detector of choice for extreme low-light conditions. With photon... more Scientific EMCCD cameras are the detector of choice for extreme low-light conditions. With photon counting capabilities, sub-electron readout noise and low dark current, EMCCDs can detect very faint signals. Traditionally, EMCCD are operated in frame-transfer mode where the image is integrated in the light-sensitive region of the sensor and then quickly transferred to a storage array before being read out. Time-Delay Integration (TDI) is a specialized readout mode optimized to image fast moving objects while preserving light sensitivity. By shifting the photoelectrons simultaneously to the movement of the object, TDI effectively increases the integration time available to collect light. The newest version of Nüvü Caméras’ CCD Controller for Counting Photons (CCCP) will allow operating EMCCD detectors using TDI readout mode with either internal or external trigger sources at more than 100k lines per second. The combination of TDI and EMCCD technologies represents a new leap for extre...
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Electron multiplying charged coupled devices (EMCCD’s) can provide significantly greater signal t... more Electron multiplying charged coupled devices (EMCCD’s) can provide significantly greater signal to noise ratios in low light conditions and/or for higher speed readout than traditional CCDs. Due to the electron multiplication before readout, the effective readout noise can be at the sub-electron level, enabling single photon counting. Traditional far UV (150 – 200 nm) imaging detectors have utilized micro-channel plates to detect usually scarce UV photons at low efficiency, amplify them into electron showers which strike a phosphor, allowing a silicon detector array to perform the final detection of the resulting visible light pulse. The typical efficiencies of UV photo detection with MCP systems ranges from a low of a few percent to as high as 25%. Given that the theoretical probability of absorption of UV photons in silicon is at least 30% in this wavelength range, then it should be possible to make use of a photon counting EMCCD to directly detect UV photons that is competitive w...
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Journal of Astronomical Telescopes, Instruments, and Systems, 2020
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High Energy, Optical, and Infrared Detectors for Astronomy VII, 2016
We report on the proton radiation effects on a 1k x 1k e2v EMCCD utilized in the Nüvü EM N2 1024 ... more We report on the proton radiation effects on a 1k x 1k e2v EMCCD utilized in the Nüvü EM N2 1024 camera. Radiation testing was performed at the TRIUMF Proton Irradiation Facility in Canada, where the e2v CCD201-20 EMCCD received a 105 MeV proton fluence up to 5.2x109 protons/cm2, emulating a 1 year’s radiation dose of solar protons in low earth orbit with nominal shielding that would be expected from a small or microsatellite. The primary space-based application is for Space Situational Awareness (SSA), where a small telescope images faint orbiting Resident Space Objects (RSOs) on the EMCCD, resulting in faint streaks at the photon level of signal in the images. Of particular concern is the effect of proton radiation on low level CTE, where very low level signals could be severely impaired if not lost. Although other groups have reported on the characteristics of irradiated EMCCDs, their CTE results are not portable to this application. To understand the real impact of proton irradiation the device must be tested under realistic operating conditions with representative backgrounds, clock periods, and signal levels. Testing was performed both in the laboratory and under a night sky on the ground in order to emulate a complex star background environment containing RSOs. The degradation is presented and mitigation techniques are proposed. As compared to conventional CCDs, the EMCCD with high gain allows faint and moving RSOs to be detected with a relatively small telescope aperture, at improved signal to noise ratio at high frame rates. This allows the satellite platform to take sharp images immediately upon slewing to the target without the need for complex and relatively slow attitude stabilization systems.
Bookmarks Related papers MentionsView impact
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Biomedical optics express, 2015
In glioma surgery, Protoporphyrin IX (PpIX) fluorescence may identify residual tumor that could b... more In glioma surgery, Protoporphyrin IX (PpIX) fluorescence may identify residual tumor that could be resected while minimizing damage to normal brain. We demonstrate that improved sensitivity for wide-field spectroscopic fluorescence imaging is achieved with minimal disruption to the neurosurgical workflow using an electron-multiplying charge-coupled device (EMCCD) relative to a state-of-the-art CMOS system. In phantom experiments the EMCCD system can detect at least two orders-of-magnitude lower PpIX. Ex vivo tissue imaging on a rat glioma model demonstrates improved fluorescence contrast compared with neurosurgical fluorescence microscope technology, and the fluorescence detection is confirmed with measurements from a clinically-validated spectroscopic probe. Greater PpIX sensitivity in wide-field fluorescence imaging may improve the residual tumor detection during surgery with consequent impact on survival.
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![Research paper thumbnail of Optimisation des observations et des données cinématiques H[alpha] de l'échantillon de galaxies proches SINGS /](https://attachments.academia-assets.com/88097879/thumbnails/1.jpg)
]("Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de ... more "Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de Maître ès sciences (M.Sc.) en Physique option Astrophysique" Thèse (M. Sc.)--Université de Montréal, 2005.
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Un nouveau contrôleur de EMCCD (Electron multiplying Charge Coupled Device) est présenté. Il perm... more Un nouveau contrôleur de EMCCD (Electron multiplying Charge Coupled Device) est présenté. Il permet de diminuer significativement le bruit qui domine lorsque la puce EMCCD est utilisé pour du comptage de photons: le bruit d'injection de charge. À l'aide de ce contrôleur, une caméra EMCCD scientifique a été construite, caractérisée en laboratoire et testée à l'observatoire du mont Mégantic. Cette nouvelle caméra permet, entre autres, de réaliser des observations de la cinématique des galaxies par spectroscopie de champ intégral par interférométrie de Fabry-Perot en lumière Ha beaucoup plus rapidement, ou de galaxies de plus faible luminosité, que les caméras à comptage de photon basées sur des tubes amplificateurs. Le temps d'intégration nécessaire à l'obtention d'un rapport signal sur bruit donné est environ 4 fois moindre qu'avec les anciennes caméras. Les applications d'un tel appareil d'imagerie sont nombreuses: photométrie rapide et faible flu...
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Biophysical Journal, 2014
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Publications of the Astronomical Society of the Pacific, 2009
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The GHASP survey was originally selected to be a subsample complementing the radio survey Westerb... more The GHASP survey was originally selected to be a subsample complementing the radio survey Westerbork survey of HI in SPirals galaxies (WHISP) providing HI distribution and velocity maps for about 400 galaxies (http://www.astro.rug.nl/whisp). The first set of GHASP galaxies was selected from the first WHISP website list but some of them have never been observed by WHISP. (4 data files).
Bookmarks Related papers MentionsView impact
High Energy, Optical, and Infrared Detectors for Astronomy VI, 2014
Bookmarks Related papers MentionsView impact
Photonics North 2013, 2013
Bookmarks Related papers MentionsView impact
Scientific detectors for astronomy 2005
... Philippe Balard1, Philippe Amram1, Olivier Boissin1, Jacques Boulesteix1, Olivier Daigle2, Je... more ... Philippe Balard1, Philippe Amram1, Olivier Boissin1, Jacques Boulesteix1, Olivier Daigle2, Jean-Luc Gach1, Olivia Garrido1, Olivier Hernandez1,2, Michel Marcelin1 1Observatoire de Marseille, 2Laboratoire d ... Photometry, ed. P. Crane & K. Kjär (Garching, ESO), 119. ...
Bookmarks Related papers MentionsView impact
Biomedical Optics 2014, 2014
Bookmarks Related papers MentionsView impact
High Energy, Optical, and Infrared Detectors for Astronomy V, 2012
Bookmarks Related papers MentionsView impact
Observatoire d’Astrophysique de l’Université de Ouagadougou, BP 7021, Ouagadougou 03,
Bookmarks Related papers MentionsView impact
EAS Publications Series, 2009
Bookmarks Related papers MentionsView impact
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 2018
We present the progress in characterization of a Nuv¨ u Cam ¨ eras CCD Controller for Counting Ph... more We present the progress in characterization of a Nuv¨ u Cam ¨ eras CCD Controller for Counting Photons ¯ (CCCP) designed for extreme low light imaging in space environment with the 1024×1024 Teledyne-e2V EMCCD detector (the CCD201-20). The EMCCD controller was designed using space qualified parts before being extensively tested in thermal vacuum. The performance test results include the readout noise, clock-induced charges, dark current, dynamic range and EM gain. We also discuss the CCCP’s integration in the coronagraph of the High-Contrast Imaging Balloon System project: a fine-pointing and optical payload for a future Canadian stratospheric balloon mission. This first space qualified EMCCD controller, named CCCPs, will enhance sensitivity of the future low-light imaging instruments for space applications such as the detection, characterization and imaging of exoplanets, search and monitoring of asteroids and space debris, UV imaging, and satellite tracking.
Bookmarks Related papers MentionsView impact
Adaptive Optics Systems VI, 2018
HiCIBaS-LOWFS is a spatially modulated pyramid wavefront sensor to be used on the HiCIBaS project... more HiCIBaS-LOWFS is a spatially modulated pyramid wavefront sensor to be used on the HiCIBaS project, a high-contrast imaging balloon borne telescope, as a fine pointing and atmospheric turbulence sensor. Since the project will be using a relatively small telescope on a limited budget, creative solutions must be developed to respond to the requirements for such systems. For example, we need a linear response to large error in order to be able to correct for pointing error in a photon-limited regime caused by the telescope small size. Most solutions aren't well suited for the optical design in HiCIBaS since the high-contrast coronagraph and the Low-Order Wavefront Sensor (LOWFS) both run as separate instruments. The design is centered around the modification of existing pyramid wavefront sensor by adding static, spatial modulation to an otherwise unmodulated system. The spatial modulation is achieved by adding an axicon (a conical optical element) at an imaged telescope pupil plane. This has for effect to add a very large non- common path aberration between the imaging plane and the wavefront sensor. This has for effect to shape the point-spread function incident on the pyramid to a ring shape, which minimize diffraction effect on the apex of imperfect pyramids. We present the first lab results involving the wavefront sensor and its performances for wavefront reconstruction and pointing accuracy. We also discuss the first on-sky results that were recorded with the 1.6-m telescope at the Observatoire du Mont-Megantic in Qubec, Canada using Universite Lavals optical AO test-bench. These results pave the way to the design and integration of the wavefront sensor in the context of the HiCIBaS project.
Bookmarks Related papers MentionsView impact
Scientific EMCCD cameras are the detector of choice for extreme low-light conditions. With photon... more Scientific EMCCD cameras are the detector of choice for extreme low-light conditions. With photon counting capabilities, sub-electron readout noise and low dark current, EMCCDs can detect very faint signals. Traditionally, EMCCD are operated in frame-transfer mode where the image is integrated in the light-sensitive region of the sensor and then quickly transferred to a storage array before being read out. Time-Delay Integration (TDI) is a specialized readout mode optimized to image fast moving objects while preserving light sensitivity. By shifting the photoelectrons simultaneously to the movement of the object, TDI effectively increases the integration time available to collect light. The newest version of Nüvü Caméras’ CCD Controller for Counting Photons (CCCP) will allow operating EMCCD detectors using TDI readout mode with either internal or external trigger sources at more than 100k lines per second. The combination of TDI and EMCCD technologies represents a new leap for extre...
Bookmarks Related papers MentionsView impact
Electron multiplying charged coupled devices (EMCCD’s) can provide significantly greater signal t... more Electron multiplying charged coupled devices (EMCCD’s) can provide significantly greater signal to noise ratios in low light conditions and/or for higher speed readout than traditional CCDs. Due to the electron multiplication before readout, the effective readout noise can be at the sub-electron level, enabling single photon counting. Traditional far UV (150 – 200 nm) imaging detectors have utilized micro-channel plates to detect usually scarce UV photons at low efficiency, amplify them into electron showers which strike a phosphor, allowing a silicon detector array to perform the final detection of the resulting visible light pulse. The typical efficiencies of UV photo detection with MCP systems ranges from a low of a few percent to as high as 25%. Given that the theoretical probability of absorption of UV photons in silicon is at least 30% in this wavelength range, then it should be possible to make use of a photon counting EMCCD to directly detect UV photons that is competitive w...
Bookmarks Related papers MentionsView impact
Journal of Astronomical Telescopes, Instruments, and Systems, 2020
Bookmarks Related papers MentionsView impact
High Energy, Optical, and Infrared Detectors for Astronomy VII, 2016
We report on the proton radiation effects on a 1k x 1k e2v EMCCD utilized in the Nüvü EM N2 1024 ... more We report on the proton radiation effects on a 1k x 1k e2v EMCCD utilized in the Nüvü EM N2 1024 camera. Radiation testing was performed at the TRIUMF Proton Irradiation Facility in Canada, where the e2v CCD201-20 EMCCD received a 105 MeV proton fluence up to 5.2x109 protons/cm2, emulating a 1 year’s radiation dose of solar protons in low earth orbit with nominal shielding that would be expected from a small or microsatellite. The primary space-based application is for Space Situational Awareness (SSA), where a small telescope images faint orbiting Resident Space Objects (RSOs) on the EMCCD, resulting in faint streaks at the photon level of signal in the images. Of particular concern is the effect of proton radiation on low level CTE, where very low level signals could be severely impaired if not lost. Although other groups have reported on the characteristics of irradiated EMCCDs, their CTE results are not portable to this application. To understand the real impact of proton irradiation the device must be tested under realistic operating conditions with representative backgrounds, clock periods, and signal levels. Testing was performed both in the laboratory and under a night sky on the ground in order to emulate a complex star background environment containing RSOs. The degradation is presented and mitigation techniques are proposed. As compared to conventional CCDs, the EMCCD with high gain allows faint and moving RSOs to be detected with a relatively small telescope aperture, at improved signal to noise ratio at high frame rates. This allows the satellite platform to take sharp images immediately upon slewing to the target without the need for complex and relatively slow attitude stabilization systems.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Biomedical optics express, 2015
In glioma surgery, Protoporphyrin IX (PpIX) fluorescence may identify residual tumor that could b... more In glioma surgery, Protoporphyrin IX (PpIX) fluorescence may identify residual tumor that could be resected while minimizing damage to normal brain. We demonstrate that improved sensitivity for wide-field spectroscopic fluorescence imaging is achieved with minimal disruption to the neurosurgical workflow using an electron-multiplying charge-coupled device (EMCCD) relative to a state-of-the-art CMOS system. In phantom experiments the EMCCD system can detect at least two orders-of-magnitude lower PpIX. Ex vivo tissue imaging on a rat glioma model demonstrates improved fluorescence contrast compared with neurosurgical fluorescence microscope technology, and the fluorescence detection is confirmed with measurements from a clinically-validated spectroscopic probe. Greater PpIX sensitivity in wide-field fluorescence imaging may improve the residual tumor detection during surgery with consequent impact on survival.
Bookmarks Related papers MentionsView impact
"Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de ... more "Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de Maître ès sciences (M.Sc.) en Physique option Astrophysique" Thèse (M. Sc.)--Université de Montréal, 2005.
Bookmarks Related papers MentionsView impact
Un nouveau contrôleur de EMCCD (Electron multiplying Charge Coupled Device) est présenté. Il perm... more Un nouveau contrôleur de EMCCD (Electron multiplying Charge Coupled Device) est présenté. Il permet de diminuer significativement le bruit qui domine lorsque la puce EMCCD est utilisé pour du comptage de photons: le bruit d'injection de charge. À l'aide de ce contrôleur, une caméra EMCCD scientifique a été construite, caractérisée en laboratoire et testée à l'observatoire du mont Mégantic. Cette nouvelle caméra permet, entre autres, de réaliser des observations de la cinématique des galaxies par spectroscopie de champ intégral par interférométrie de Fabry-Perot en lumière Ha beaucoup plus rapidement, ou de galaxies de plus faible luminosité, que les caméras à comptage de photon basées sur des tubes amplificateurs. Le temps d'intégration nécessaire à l'obtention d'un rapport signal sur bruit donné est environ 4 fois moindre qu'avec les anciennes caméras. Les applications d'un tel appareil d'imagerie sont nombreuses: photométrie rapide et faible flu...
Bookmarks Related papers MentionsView impact
Biophysical Journal, 2014
Bookmarks Related papers MentionsView impact
Publications of the Astronomical Society of the Pacific, 2009
Bookmarks Related papers MentionsView impact