Mr. Joeleff Fitzsimmons Profile

Joeleff Fitzsimmons

Mechanical Engineer at NRC-Herzberg Astronomy & Astrophysics

SPIE Involvement:

Author

Publications (48)

Proceedings Article | 5 October 2023 Poster + Paper

Poster + Paper

Testing and performance of IFS upgrades for GPI 2.0

Dillon Peng, Jeffrey Chilcote, Quinn Konopacky, Randall Hamper, Joel Burke, Brian Sands, Matthew Engstrom, Abigail Karaszewski, Rebecca Boyle, Mary Anne Limbach, Alexandra Greenbaum, Anand Sivaramakrishnan, Alexa Rizika, Saavidra Perera, Clarissa Do Ó, Jayke Nguyen, Bruce Macintosh, Joeleff Fitzsimmons, Christian Marois, Fredrik Rantakyrö, Arlene Aleman, Jérôme Maire, Robert De Rosa, Emiel Por, Dmitry Savransky, Meiji Nguyen, Marshall Perrin, Remi Soummer, Laurent Pueyo, Bryony Nickson, Eckhart Spalding

Proceedings Volume 12680, 126801Y (2023) https://doi.org/10.1117/12.2677675

KEYWORDS: Prisms, Gemini Planet Imager, Iterated function systems, Optical filters, Spectral resolution, Optical alignment, Gemini Observatory, Design and modelling, Wavefront sensors

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Proceedings Article | 5 October 2023 Presentation + Paper

Presentation + Paper

Upgrading the Gemini planet imager to GPI 2.0

Saavidra Perera, Jeffrey Chilcote, Quinn Konopacky, Joeleff Fitzsimmons, Randall Hamper, Bruce Macintosh, Christian Marois, Dmitry Savransky, Remi Soummer, Jean-Pierre Veran, Guido Agapito, Arlene Aleman, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Joel Burke, Maeve Curliss, Robert De Rosa, Clarissa Do Ó, Jennifer Dunn, Simone Esposito, Guillaume Filion, Dan Kerley, Jean-Thomas Landry, Olivier Lardiere, Daniel Levinstein, Duan Li, Mary Anne Limbach, Alex Madurowicz, Jérôme Maire, Maxwell Millar-Blanchaer, Bryony Nickson, Eric Nielsen, Jayke Nguyen, Meiji Nguyen, Dillon Peng, Marshall Perrin, Emiel Por, Lisa Poyneer, Laurent Pueyo, Fredrik Rantakyrö, Brian Sands, Eckhart Spalding, Kaitlyn Summey

Proceedings Volume 12680, 1268001 (2023) https://doi.org/10.1117/12.2676960

KEYWORDS: Gemini Planet Imager, Wavefront sensors, Planets, Gemini Observatory, Equipment, Adaptive optics, Prisms, Cameras, Stars, Exoplanets

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

Blinking the fringes: initial development and results of the Ultra-Low Speed Optical Chopper for the Self-Coherent Camera

Adam Johnson, Christian Marois, Darryl Gamroth, Joeleff Fitzsimmons, Olivier Lardière, William Thompson, Garima Singh, Colin Bradley

Proceedings Volume 12185, 1218575 (2022) https://doi.org/10.1117/12.2630406

KEYWORDS: Stars, Imaging systems, Sensors, Optical choppers, Mechanical engineering, Cameras, Prototyping, Control systems, Optical instrument design, Wavefronts, Exoplanets

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Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

Deployment of focal plane WFS technologies on 8-m telescopes: from the Subaru SPIDERS pathfinder, to the facility-class GPI 2.0 CAL2 system

Christian Marois, Olivier Lardière, William Thompson, Garima Singh, Adam Johnson, Tim Hardy, Joeleff Fitzsimmons, Benjamin Gerard, Suresh Sivanandam, Simon Thibault, Dmitry Savransky, Colin Bradley, Rebecca Jensen-Clem, Mathieu Demers, Qiang Fu, Wolfgang Heidrich, Mamadou N'Diaye

Proceedings Volume 12185, 121851Y (2022) https://doi.org/10.1117/12.2630564

KEYWORDS: Telescopes, Exoplanets, Wavefront sensors, Stars, Wavefronts, Gemini Planet Imager, Speckle, Imaging systems, Cameras, Adaptive optics

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

Optical design of SPIDERS, a Subaru Pathfinder Instrument for Detecting Exoplanets and Retrieving Spectra

Olivier Lardière, Christian Marois, William Thompson, Garima Singh, Adam Johnson, Joeleff Fitzsimmons, Tim Hardy, Mamadou N'diaye, Wolfgang Heidrich, Qiang Fu, Denis Brousseau, Simon Thibault

Proceedings Volume 12185, 1218547 (2022) https://doi.org/10.1117/12.2629644

KEYWORDS: Cameras, Mirrors, Telescopes, Adaptive optics, Optical design, Wavefront sensors, Exoplanets, Coherence imaging

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

HEART: Gemini Planet Imager upgrade (GPI2.0) Real-Time Controller (RTC) using the Herzberg Extensible Adaptive Real-time Toolkit (HEART)

Dan Kerley, Jennifer Dunn, Jean-Pierre Véran, Lianne Muller, Edward Chapin, Malcolm Smith, Jonathan Stocks, Darryl Gamroth, B. Macintosh, Christian Marois, Olivier Lardière, Dmitry Savransky, ‪Joeleff Fitzsimmons, Quinn Konopacky, Jeffrey Chilcote

Proceedings Volume 12185, 121856H (2022) https://doi.org/10.1117/12.2630705

KEYWORDS: Heart, Real-time computing, Adaptive optics, Gemini Planet Imager, Gemini Observatory, Wavefronts, Wavefront sensors, Telescopes, Control systems, Calibration

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

GPI 2.0: pyramid wavefront sensor status

Saavidra Perera, Jérôme Maire, Clarissa Do Ó, Jayke Nguyen, Daniel Levinstein, Quinn Konopacky, Jeffrey Chilcote, Joeleff Fitzsimmons, Randall Hamper, Dan Kerley, Bruce Macintosh, Christian Marois, Fredrik Rantakyrö, Dmitry Savransky, Jean-Pierre Veran, Guido Agapito, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Jennifer Dunn, Simone Esposito, Guillaume Filion, Jean Thomas Landry, Olivier Lardiere, Duan Li, Daren Dillon, Alex Madurowicz, Dillon Peng, Lisa Poyneer, Eckhart Spalding

Proceedings Volume 12185, 121854C (2022) https://doi.org/10.1117/12.2629062

KEYWORDS: Mirrors, Gemini Planet Imager, Wavefront sensors, Electron multiplying charge coupled devices, Adaptive optics, Modulation, Optics manufacturing, Gemini Observatory, Optical components, Cameras

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

GPI 2.0: performance of upgrades to the Gemini Planet Imager CAL and IFS

Dillon Peng, Maeve Curliss, Mary Anne Limbach, Jeffrey Chilcote, Randall Hamper, Quinn Konopacky, Joeleff Fitzsimmons, Bruce Macintosh, Christian Marois, Fredrik Rantakyrö, Arlene Aleman, Jérôme Maire, Robert De Rosa, Emiel Por, Dmitry Savransky, Brian Sands, Marshall Perrin, Remi Soummer, Isabel Kain, Laurent Pueyo, Bryony Nickson, Meiji Nguyen, Clarissa Do Ó, Saavidra Perera, Eckhart Spalding

Proceedings Volume 12184, 1218443 (2022) https://doi.org/10.1117/12.2630329

KEYWORDS: Gemini Planet Imager, Sensors, Cameras, Prisms, Microlens array, Wavefront sensors, Spectral resolution, Gemini Observatory

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

GPI 2.0: upgrade status of the Gemini Planet Imager

Jeffrey Chilcote, Quinn Konopacky, Joeleff Fitzsimmons, Randall Hamper, Bruce Macintosh, Christian Marois, Dmitry Savransky, Remi Soummer, Jean-Pierre Véran, Guido Agapito, Arlene Aleman, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Maeve Curliss, Robert De Rosa, Clarissa Do Ó, Jennifer Dunn, Simone Esposito, Guillaume Filion, Dan Kerley, Jean-Thomas Landry, Olivier Lardiere, Daniel Levinstein, Duan Li, Mary Anne Limbach, Alex Madurowicz, Jérôme Maire, Max Millar-Blanchaer, Bryony Nickson, Eric Nielsen, Jayke Nguyen, Meiji Nguyen, Dillon Peng, Saavidra Perera, Marshall Perrin, Emiel Por, Lisa Poyneer, Laurent Pueyo, Fredrik Rantakyrö, Brian Sands, Eckhart Spalding, Kaitlyn Summey

Proceedings Volume 12184, 121841T (2022) https://doi.org/10.1117/12.2630159

KEYWORDS: Gemini Planet Imager, Planets, Stars, Gemini Observatory, Adaptive optics, Prisms, Exoplanets, Iterated function systems, Wavefront sensors, Spectral resolution

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Proceedings Article | 29 August 2022 Poster

Poster

GPI 2.0: End-to-end simulations of the AO-coronagraph system

Jayke Nguyen, Jérôme Maire, Saavidra Perera, Daniel Levinstein, Clarissa Do Ó, Quinn Konopacky, Jeffrey Chilcote, Joeleff Fitzsimmons, Randall Hamper, Dan Kerley, Bruce Macintosh, Christian Marois, Fredrik Rantakyrö, Dmitry Savransky, Jean-Pierre Véran, Guido Agapito, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Jennifer Dunn, Simone Esposito, Guillaume Filion, Jean-Thomas Landry, Olivier Lardière, Duan Li, Alex Madurowicz, Meiji Nguyen, Bryony Nickson, Dillon Peng, Emiel Por, Lisa Poyneer,

Proceedings Volume 12185, 121853M (2022) https://doi.org/10.1117/12.2630446

KEYWORDS: Gemini Planet Imager, Adaptive optics, Imaging systems, Device simulation, Wavefront sensors, Telescopes, Systems modeling, Performance modeling, Gemini Observatory, Exoplanets

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Proceedings Article | 29 August 2022 Poster

Poster

GPI 2.0: performance evaluation of the wavefront sensor’s EMCCD

Clarissa Do Ó, Saavidra Perera, Jérôme Maire, Jayke Nguyen, Daniel Levinstein, Quinn Konopacky, Jeffrey Chilcote, Joeleff Fitzsimmons, Randall Hamper, Dan Kerley, Bruce Macintosh, Christian Marois, Fredrik Rantakyrö, Dmitry Savransky, Jean-Pierre Véran, Guido Agapito, S. Mark Ammons, Marco Bonaglia, Marc-André Boucher, Jennifer Dunn, Simone Esposito, Guillaume Filion, Jean-Thomas Landry, Olivier Lardière, Duan Li, Alex Madurowicz, Dillon Peng, Lisa Poyneer, Eckhart Spalding

Proceedings Volume 12185, 1218579 (2022) https://doi.org/10.1117/12.2629094

KEYWORDS: Gemini Planet Imager, Electron multiplying charge coupled devices, Sensors, Wavefronts, Wavefront sensors, Cameras, Adaptive optics, Charge-coupled devices, Telescopes, Stars

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

GPI 2.0: upgrading the Gemini Planet Imager

Jeffrey Chilcote, Quinn Konopacky, Robert De Rosa, Randall Hamper, Bruce Macintosh, Christian Marois, Marshall Perrin, Dmitry Savransky, Rémi Soummer, Jean-Pierre Véran, Guido Agapito, Arlene Aleman, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Maeve Curliss, Jennifer Dunn, Simone Esposito, Guillaume Filion, Joeleff Fitzsimmons, Isabel Kain, Dan Kerley, Jean-Thomas Landry, Olivier Lardiere, Marie Lemoine-Busserolle, Duan Li, Mary Anne Limbach, Alex Madurowicz, Jerome Maire, Mamadou N'Diaye, Eric Nielsen, Lisa Poyneer, Laurent Pueyo, Kaitlyn Summey, Coleman Thomas

Proceedings Volume 11447, 114471S (2020) https://doi.org/10.1117/12.2562578

KEYWORDS: Gemini Planet Imager, Gemini Observatory, Jupiter, Exoplanets, Observatories, Planets, Telescopes, Wavefront sensors, Spectral resolution, Prisms

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

The InfraRed Imaging Spectrograph (IRIS) for TMT: support structure final design

Brian Hoff, Joeleff Fitzsimmons, Gordon Lacy, Jennifer Dunn, Glen Herriot, Jeffrey Crane, Peter Byrnes, Dean Chalmers, David Andersen, Jenny Atwood, Tim Hardy

Proceedings Volume 11451, 114511Z (2020) https://doi.org/10.1117/12.2560757

KEYWORDS: IRIS Consortium, Thirty Meter Telescope, Infrared Imaging Spectrograph, Optical instrument design, Structural design, Optical alignment, Polymers, Metals, Interfaces, Infrared imaging

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

The Herzberg Astronomy and Astrophysics Research Centre's vibration measurement capabilities with applications to astronomical instrumentation

Peter W. Byrnes, Adam Densmore, Joeleff Fitzsimmons, Glen Herriot

Proceedings Volume 11445, 114456U (2020) https://doi.org/10.1117/12.2562758

KEYWORDS: Vibrometry, Astronomy, Astrophysics, Astronomical instrumentation, Radio telescopes, Observatories, Deformable mirrors, Gemini Observatory, Adaptive optics

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

CO2-based refrigeration system for the NFIRAOS optics enclosure

Adam Densmore, Glen Herriot, Joeleff Fitzsimmons, Peter W. Byrnes, Ian Welle, Jarod Holma, Megan Tiedje, Jay Burbee, Calvin Winter

Proceedings Volume 11447, 1144739 (2020) https://doi.org/10.1117/12.2563141

KEYWORDS: Carbon dioxide, Cooling systems, Adaptive optics, Prototyping, Light emitting diodes, Climate change, Observatories, Foam, Aluminum, Skin

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

GPI 2.0: design of the pyramid wave front sensor upgrade for GPI

Joeleff Fitzsimmons, Guido Agapito, Marco Bonaglia, Marc-André Boucher, Jeffrey Chilcote, Jennifer Dunn, Simone Esposito, Guillaume Filion, Dan Kerley, Quinn Konopacky, Jean-Thomas Landry, Olivier Lardiere, Bruce Macintosh, Alex Madurowicz, Jerome Maire, Christian Marois, Lisa Poyneer, Dmitry Savransky, Jean-Pierre Veran

Proceedings Volume 11448, 114486J (2020) https://doi.org/10.1117/12.2563150

KEYWORDS: Gemini Planet Imager, Wavefront sensors, Gemini Observatory, Electron multiplying charge coupled devices, Sensors, Adaptive optics, Optomechanical design, Computer architecture, Tolerancing

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Proceedings Article | 17 July 2018 Paper

Paper

NFIRAOS adaptive optics for the Thirty Meter Telescope

Jeffrey Crane, Glen Herriot, David Andersen, Jenny Atwood, Peter Byrnes, Adam Densmore, Jennifer Dunn, Joeleff Fitzsimmons, Tim Hardy, Brian Hoff, Kate Jackson, Dan Kerley, Olivier Lardière, Malcolm Smith, Jonathan Stocks, Jean-Pierre Véran, Corinne Boyer, Lianqi Wang, Gelys Trancho, Melissa Trubey

Proceedings Volume 10703, 107033V (2018) https://doi.org/10.1117/12.2314341

KEYWORDS: Mirrors, Thirty Meter Telescope, Adaptive optics, Beam splitters, Telescopes, Stars, Calibration, Interfaces, Wavefront sensors, Sensors

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Proceedings Article | 29 August 2017 Paper

Paper

Design and optimization of silicon carbide mirrors for the Canadian Large Optical Telescope (LOT)

Joeleff Fitzsimmons

Proceedings Volume 10313, 103130Y (2017) https://doi.org/10.1117/12.2283830

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Proceedings Article | 23 August 2017 Paper

Paper

Optomechanical design of TMT NFIRAOS Subsystems at INO

Frédéric Lamontagne, Nichola Desnoyers, Martin Grenier, Pierre Cottin, Mélanie Leclerc, Olivier Martin, Louis Buteau-Vaillancourt, Marc-André Boucher, Reston Nash, Olivier Lardière, David Andersen, Jenny Atwood, Alexis Hill, Peter Byrnes, Glen Herriot, Joeleff Fitzsimmons, Jean-Pierre Véran

Proceedings Volume 10371, 103710N (2017) https://doi.org/10.1117/12.2276954

KEYWORDS: Large telescopes, Mirror mounts, Optical mounts, Optomechanical design, Telescopes, Integrated optics, Adaptive optics, Finite element methods, Infrared imaging, Mirrors

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Proceedings Article | 9 August 2016 Paper

Paper

Design and analysis of the NFIRAOS thermal optics enclosure

Joeleff Fitzsimmons, David Andersen, Jenny Atwood, Peter Byrnes, Glen Herriot, Alexis Hill, Kei Szeto

Proceedings Volume 9908, 9908A5 (2016) https://doi.org/10.1117/12.2233633

KEYWORDS: Finite element methods, Thermography, Infrared telescopes, Adaptive optics, Thirty Meter Telescope, Thermography, Aluminum, Skin, Cladding, Astronomy, Optomechanical components

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The Narrow Field InfraRed Adaptive Optics System (NFIRAOS) will be the first-light facility adaptive optics system for the Thirty Meter Telescope (TMT). In order to meet the optical performance and stability specifications essential to leveraging the extraordinary capabilities of the TMT, all of the optical components within NFIRAOS will be protected within a large thermally-controlled optics enclosure (ENCL). Among the many functions performed by the ENCL, the most critical functions include providing a highly stable, light-tight, cold, dry environment maintained at 243±0.5 K for the NFIRAOS opto-mechanical sub-systems and supporting TABL structure. Although the performance of the ENCL during the science operation of NFIRAOS is critical, the maximum thermal loading will be defined by the cooldown/ warm-up cycle which must be accomplished within a time-frame that will minimize the on-sky operational impact due to daytime maintenance work. This study describes the thermal/mechanical design development and supporting analyses (analytical and finite element analyses (FEA)) completed during the preliminary design phase and through the current progression of the ENCL final design phase. The walls of the ENCL consist of interlocking, multilayered, thermally insulated panels, which are supported by an externally located structural framework which attaches to the NFIRAOS Instrument Support Structure. The regulation of the interior ENCL wall surface temperature to within ±0.5 K requires that the heat flux into the interior of NFIRAOS be eliminated by cooling a thermal conduction plate embedded between multiple layers of insulation. The thermal design of the enclosure was evaluated for both steady-state (SS) performance and transient performance (cool-down and warm-up cycles). The transient analysis utilizes a hybrid of a one-dimensional thermal network approach combined with three-dimensional conjugate heat transfer analyses of explicit opto-mechanical components within the ENCL. Many design-parameter combinations were evaluated to determine the performance impact of cooling power and transient temperature profiles. The results derived from the analyses of these design iterations indicate the multi-layer enclosure wall design will meet all thermal requirements. During SS operation, the interior temperature variation is within ±0.5 K of the target operational temperature, while the heat influx from the exterior TMT environment is 1528 W (extracted by the embedded cold plate). The transient cool-down cycle will take approximately 15 hours to complete and requires the in-situ air handling units to deliver 14KW of cooling power (derated for the TMT site conditions) throughout the interior space of the NFIRAOS ENCL.

Proceedings Article | 27 July 2016 Paper

Paper

NFIRAOS in 2015: engineering for future integration of complex subsystems

Jenny Atwood, David Andersen, Peter Byrnes, Adam Densmore, Joeleff Fitzsimmons, Glen Herriot, Alexis Hill

Proceedings Volume 9909, 990934 (2016) https://doi.org/10.1117/12.2231813

KEYWORDS: Adaptive optics, Interfaces, Optical alignment, Thirty Meter Telescope, Mirrors, Calibration, Wavefront sensors, Error analysis, Tolerancing, Image resolution

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Proceedings Article | 22 July 2016 Paper

Paper

A prototype of the NFIRAOS to instrument thermo-mechanical interface

Alexis Hill, Peter Byrnes, Joeleff Fitzsimmons, Glen Herriot, Vlad Reshetov, Kei Szeto, Calvin Winter, Yan Pennec, Sam Lambert, Evan Poulton, Jeffrey Doyle

Proceedings Volume 9912, 991202 (2016) https://doi.org/10.1117/12.2232848

KEYWORDS: Thirty Meter Telescope, Domes, Prototyping, Interfaces, Adaptive optics, IRIS Consortium, Skin, Aluminum, Tissue optics, Liquids

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Proceedings Article | 28 July 2014 Paper

Paper

Design and analysis of a large-diameter precision optical mount for NFIRAOS

Joeleff Fitzsimmons, Alexis Hill

Proceedings Volume 9147, 91478U (2014) https://doi.org/10.1117/12.2057213

KEYWORDS: Actuators, Finite element methods, Near field optics, Optical mounts, Mirrors, Infrared telescopes, Adaptive optics, Adhesives, Interfaces, Thirty Meter Telescope

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Proceedings Article | 21 July 2014 Paper

Paper

Present opto-mechanical design status of NFIRAOS

Peter W. Byrnes, Jenny Atwood, Marc-André Boucher, Joeleff Fitzsimmons, Alexis Hill, Glen Herriot, Paolo Spanò, Kei Szeto, Ivan Wevers

Proceedings Volume 9148, 914837 (2014) https://doi.org/10.1117/12.2056941

KEYWORDS: Mirrors, Telescopes, Finite element methods, Adaptive optics, Beam splitters, Interfaces, Wavefront sensors, Computer aided design, Solid modeling, Cameras

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Proceedings Article | 13 September 2012 Paper

Paper

TMT NFIRAOS: adaptive optics system for the Thirty Meter Telescope

Glen Herriot, David Andersen, Jenny Atwood, Peter Byrnes, Marc-André Boucher, Corinne Boyer, Kris Caputa, Carlos Correia, Jennifer Dunn, Brent Ellerbroek, Joeleff Fitzsimmons, Luc Gilles, Paul Hickson, Alexis Hill, Dan Kerley, John Pazder, Vlad Reshetov, Scott Roberts, Malcolm Smith, Jean-Pierre Véran, Lianqi Wang, Ivan Wevers

Proceedings Volume 8447, 84471M (2012) https://doi.org/10.1117/12.925087

KEYWORDS: Adaptive optics, Telescopes, Wavefront sensors, Field programmable gate arrays, Mirrors, Calibration, Laser guide stars, Actuators, Space telescopes, Thirty Meter Telescope

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Proceedings Article | 13 September 2012 Paper

Paper

TMT adaptive optics program status report

Brent Ellerbroek, Sean Adkins, David Andersen, Jenny Atwood, Arnaud Bastard, Yong Bo, Marc-Andre Boucher, Corinne Boyer, Peter W. Byrnes, Kris Caputa, Shanqiu Chen, Carlos Correia, Raphael Cousty, Joeleff Fitzsimmons, Luc Gilles, James Gregory, Glen Herriot, Paul Hickson, Alexis Hill, John Pazder, Hubert Pagès, Thomas Pfrommer, Vladimir Reshetov, Scott Roberts, Jean-Christophe Sinquin, Matthias Schoeck, Malcolm Smith, Jean-Pierre Véran, Lianqi Wang, Kai Wei, Ivan Wevers

Proceedings Volume 8447, 84471J (2012) https://doi.org/10.1117/12.927046

KEYWORDS: Adaptive optics, Laser guide stars, Telescopes, Prototyping, Sensors, Wavefronts, Electronics, Sodium, Laser systems engineering, Thirty Meter Telescope

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Proceedings Article | 13 July 2010 Paper

Paper

First light adaptive optics systems and components for the Thirty Meter Telescope

Brent Ellerbroek, Sean Adkins, David Andersen, Jennifer Atwood, Steve Browne, Corinne Boyer, Peter Byrnes, Kris Caputa, Rodolphe Conan, Raphael Cousty, Daren Erikson, Joeleff Fitzsimmons, Frederick Gamache, Luc Gilles, Glen Herriot, Paul Hickson, Olivier Lardier, Pierre Morin, John Pazder, Thomas Pfrommer, David Quinn, Vladimir Reshetov, Scott Roberts, Jean-Christophe Sinquin, Matthias Schoeck, Malcolm Smith, Glenn Tyler, Jeff Vaughn, Jean-Pierre Veran, Curt Vogel, Lianqi Wang, Ivan Wevers

Proceedings Volume 7736, 773604 (2010) https://doi.org/10.1117/12.856503

KEYWORDS: Adaptive optics, Laser guide stars, Telescopes, Sensors, Distortion, Wavefront sensors, Space telescopes, Stars, Sodium, Wavefronts

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Proceedings Article | 13 July 2010 Paper

Paper

NFIRAOS: TMT's facility adaptive optics system

Glen Herriot, David Andersen, Jennifer Atwood, Corinne Boyer, Annie Beauvillier, Peter Byrnes, Rod Conan, Brent Ellerbroek, Joeleff Fitzsimmons, Luc Gilles, Paul Hickson, Alexis Hill, Kate Jackson, Olivier Lardière, John Pazder, Thomas Pfrommer, Vlad Reshetov, Scott Roberts, Jean-Pierre Véran, Lianqi Wang, Ivan Wevers

Proceedings Volume 7736, 77360B (2010) https://doi.org/10.1117/12.857662

KEYWORDS: Telescopes, Adaptive optics, Stars, Calibration, Wavefront sensors, Mirrors, Beam splitters, Visible radiation, Sensors, Sodium

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Proceedings Article | 23 July 2008 Paper

Paper

Stable flexure mounting of a MEMS deformable mirror for the GPI Planet Imager

Alexis Hill, Darren Erickson, Joeleff Fitzsimmons, Paul Bierden, Steven Cornelissen, Dave Palmer

Proceedings Volume 7018, 70181F (2008) https://doi.org/10.1117/12.789408

KEYWORDS: Microelectromechanical systems, Gemini Planet Imager, Adaptive optics, Humidity, Actuators, Deformable mirrors, Mirrors, Planets, Gemini Observatory, Optical mounts

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Proceedings Article | 23 July 2008 Paper

Paper

Design of high-resolution variable size spatial filter for Gemini Planet Imager using flexure elements

Vlad Reshetov, Joeleff Fitzsimmons

Proceedings Volume 7018, 701856 (2008) https://doi.org/10.1117/12.789515

KEYWORDS: Actuators, Spatial filters, Wavefront sensors, Gemini Planet Imager, Aluminum, Temperature metrology, Wavefronts, Calibration, Adaptive optics, Tungsten

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Proceedings Article | 23 July 2008 Paper

Paper

Design and analysis of flexure mounts for precision optics

Joeleff Fitzsimmons, Darren Erickson, Alexis Hill, Randall Bartos, James Wallace

Proceedings Volume 7018, 70181K (2008) https://doi.org/10.1117/12.790046

KEYWORDS: Mirrors, Gemini Planet Imager, Adhesives, Distortion, Precision optics, Optical mounts, Finite element methods, Optics manufacturing, Mirror mounts, Telescopes

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Proceedings Article | 23 June 2006 Paper

Paper

Conceptual design of enclosure for Thirty Meter Telescope

N. Loewen, W. Brzezik, J. Fitzsimmons, D. Halliday, S. Sun, A. Vasiljevic

Proceedings Volume 6267, 62672I (2006) https://doi.org/10.1117/12.671867

KEYWORDS: Camera shutters, Telescopes, Optical instrument design, Interfaces, Spherical lenses, Skin, Control systems, Structural design, Tolerancing, Thirty Meter Telescope

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Proceedings Article | 23 August 2005 Paper

Paper

Validation and verification of integrated model simulations of a thirty meter telescope

Dan Kerley, Scott Roberts, Jennifer Dunn, Nathan Stretch, Malcolm Smith, Simon Sun, John Pazder, Joeleff Fitzsimmons

Proceedings Volume 5867, 58670Q (2005) https://doi.org/10.1117/12.618557

KEYWORDS: Data modeling, Mirrors, Zemax, Telescopes, Integrated modeling, Device simulation, Interfaces, Laminated object manufacturing, Transform theory, Systems modeling

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Proceedings Article | 16 November 2004 Paper

Paper

TMT/VLOT integrated modeling

Jennifer Dunn, Scott Roberts, Dan Kerley, Joeleff Fitzsimmons, John Pazder, Glen Herriot, Malcolm Smith

Proceedings Volume 5579, (2004) https://doi.org/10.1117/12.567555

KEYWORDS: Telescopes, Mirrors, Adaptive optics, Integrated modeling, Space telescopes, Device simulation, Optical instrument design, Geometrical optics, Control systems, Thirty Meter Telescope

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Proceedings Article | 16 September 2004 Paper

Paper

Very Large Optical Telescope (VLOT) integrated model enhancements

Jennifer Dunn, Scott Roberts, Joeleff Fitzsimmons, John Pazder, Jean-Pierre Veran, Glen Herriot, Malcolm Smith

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552315

KEYWORDS: Adaptive optics, Integrated modeling, Telescopes, Mirrors, Space telescopes, Device simulation, Systems modeling, Data modeling, Ray tracing, Finite element methods

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Proceedings Article | 16 September 2004 Paper

Paper

Parametric modeling and control of telescope wind-induced vibration

Douglas MacMynowski, George Angeli, Konstantinos Vogiatzis, Joeleff Fitzsimmons, Stephen Padin

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552282

KEYWORDS: Mirrors, Telescopes, Turbulence, Space telescopes, Optical instrument design, Systems modeling, Performance modeling, Secondary tip-tilt mirrors, Wind measurement, Control systems

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Proceedings Article | 16 September 2004 Paper

Paper

Modeling tools to estimate the performance of the Thirty Meter Telescope: an integrated approach

George Angeli, Jennifer Dunn, Scott Roberts, Douglas MacMynowski, Anna Segurson, Konstantinos Vogiatzis, Joeleff Fitzsimmons

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552523

KEYWORDS: Telescopes, Mirrors, Integrated modeling, Device simulation, Sensors, Integrated optics, Actuators, Optical instrument design, Astronomy, Thirty Meter Telescope

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Proceedings Article | 16 September 2004 Paper

Paper

Predicting the aerodynamic performance of the Canadian Very Large Optical Telescope

Joeleff Fitzsimmons, Jennifer Dunn, Glen Herriot, Laurent Jolissaint, Scott Roberts, Kevin Cooper, Mahmoud Mamou

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552317

KEYWORDS: Mirrors, Aerodynamics, Telescopes, CFD analysis, Optical telescopes, Integrated modeling, Data modeling, Wind measurement, Performance modeling, Thirty Meter Telescope

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Proceedings Article | 7 July 2004 Paper

Paper

Integrated modeling of the Canadian Very Large Optical Telescope

Scott Roberts, John Pazder, Joeleff Fitzsimmons, Glen Herriot, Nathan Loewen, Malcolm Smith, Jennifer Dunn, Leslie Saddlemyer

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566206

KEYWORDS: Mirrors, Telescopes, Integrated modeling, Systems modeling, Actuators, Structural dynamics, Device simulation, Integrated optics, Geometrical optics, Interfaces

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Proceedings Article | 7 July 2004 Paper

Paper

Aerodynamic modeling of the Canadian Very Large Optical Telescope

Joeleff Fitzsimmons, Glen Herriot, Laurent Jolissaint, Scott Roberts, Kevin Cooper, Mahmoud Mamou

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566246

KEYWORDS: Mirrors, CFD analysis, Aerodynamics, Telescopes, Actuators, Integrated modeling, Data modeling, Optical telescopes, MATLAB, Wind measurement

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Proceedings Article | 7 July 2004 Paper

Paper

VLOT: a modest Canadian 20-m telescope

Dennis Crabtree, Scott Roberts, Joeleff Fitzsimmons, John Pazder, Glen Herriot, Malcolm Smith, Jennifer Dunn, Leslie Saddlemyer

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566114

KEYWORDS: Telescopes, Mirrors, Optical instrument design, Adaptive optics, Imaging spectroscopy, Space telescopes, Integrated modeling, Spectroscopy, Manufacturing, Domes

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Proceedings Article | 17 February 2003 Paper

Paper

HARP-B: a 350-GHz 16-element focal plane array for the James Clerk Maxwell Telescope

Henry Smith, Richard Hills, Stafford Withington, Johnathan Richer, Jamie Leech, Ross Williamson, Hugh Gibson, Roger Dace, P. Ananthasubramanian, Robert Barker, Robert Baldwin, Howard Stevenson, Peter Doherty, Dennis Molloy, Victor Quy, Chris Lush, Sally Hales, William Dent, Ian Pain, Robert Wall, Peter Hastings, Brenda Graham, Thomas Baillie, Ken Laidlaw, Richard Bennett, Ian Laidlaw, William Duncan, Maureen Ellis, Russell Redman, Robert Wooff, Keith Yeung, Joeleff Fitzsimmons, Lorne Avery, Dennis Derdall, Dean Josephson, Andre Anthony, Raj Atwal, Tomas Chylek, Dean Shutt, Per Friberg, Nicholas Rees, Robin Philips, Matthias Kroug, Teun Klapwijk, Tony Zijlstra

Proceedings Volume 4855, (2003) https://doi.org/10.1117/12.459674

KEYWORDS: Control systems, Receivers, Calibration, Imaging systems, Mirrors, Telescopes, Staring arrays, Astrophysics, Connectors, Single sideband modulation

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Proceedings Article | 30 January 2003 Paper

Paper

Canadian very large optical telescope technical studies

Scott Roberts, Christopher Morbey, Dennis Crabtree, Ray Carlberg, David Crampton, Timothy Davidge, Joeleff Fitzsimmons, Michael Gedig, David Halliday, James Hesser, Glen Herriot, J. Beverly Oke, John Pazder, Kei Szeto, Jean-Pierre Veran

Proceedings Volume 4840, (2003) https://doi.org/10.1117/12.459088

KEYWORDS: Telescopes, Mirrors, Adaptive optics, Space telescopes, Optical instrument design, Point spread functions, Silicon carbide, Sensors, Stars, Control systems

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Proceedings Article | 16 August 2000 Paper

Paper

Manufacturing and heat-treatment procedure for the ALTAIR optical bench

Joeleff Fitzsimmons, Scott Roberts, Kei Szeto, Jerry Sebesta

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395409

KEYWORDS: Aluminum, Optical benches, Manufacturing, Optics manufacturing, Optical components, Telescopes, Finite element methods, Gemini Observatory, Optical design, Heat treatments

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Proceedings Article | 16 August 2000 Paper

Paper

Design of a convex and camera mirror support system for Altair, the Gemini-North adaptive optics system

Kei Szeto, Scott Roberts, Andre Anthony, Joeleff Fitzsimmons, Robert Gaunt, Jerry Sebesta, Jean-Pierre Veran

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395416

KEYWORDS: Mirrors, Cameras, Temperature metrology, Mirror mounts, Assembly tolerances, Off axis mirrors, Optical benches, Telescopes, Image quality, Tolerancing

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Proceedings Article | 16 August 2000 Paper

Paper

Mechanical design of Altair, the Gemini-North adaptive optics system

Scott Roberts, Joeleff Fitzsimmons, Kei Szeto, Andre Anthony, Greg Siddall, Robert Gaunt, Philip Shott, Jerry Sebesta, Karen Taylor, Dave Duncan

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395418

KEYWORDS: Mirrors, Optical benches, Telescopes, Electronics, Space telescopes, Aluminum, Adaptive optics, Beam splitters, Off axis mirrors, Cameras

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Proceedings Article | 3 July 2000 Paper

Paper

The large adaptive reflector: a 200-m diameter wideband centimeter- to meter-wave radio telescope

Brent Carlson, Luc Bauwens, Leonid Belostotski, Elizabeth Cannon, Ya-Ying Chang, Xiaohui Deng, Peter Dewdney, Joeleff Fitzsimmons, David Halliday, Kai Kuerschner, Gerard Lachapelle, David Lo, Pedram Mousavi, Meyer Nahon, Lot Shafai, Sigfried Stiemer, Russell Taylor, Bruce Veidt

Proceedings Volume 4015, (2000) https://doi.org/10.1117/12.390431

KEYWORDS: Reflectors, Actuators, Distance measurement, Telescopes, Receivers, Antennas, Radio telescopes, Cameras, Mirrors, Control systems

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Proceedings Article | 3 July 2000 Paper

Paper

Steady-state analysis of the multi-tethered aerostat platform for the Large Adaptive Reflector telescope

Joeleff Fitzsimmons, Bruce Veidt, Peter Dewdney

Proceedings Volume 4015, (2000) https://doi.org/10.1117/12.390441

KEYWORDS: Spherical lenses, Reflectors, Aerodynamics, Radio telescopes, Receivers, Reflector telescopes, Safety, 3D modeling, Observatories, Astrophysics

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Showing 5 of 48 publications

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