Mr. Scott C. Roberts Profile

Scott C. Roberts

Director - Astronomy Technology at National Research Council Canada

SPIE Involvement:

Conference Chair | Editor | Author

Publications (56)

Proceedings Article | 5 August 2024 Presentation + Paper

Presentation + Paper

The final design of the Gemini Infrared Multi-Object Spectrograph: Gemini’s new adaptive optics facility instrument

Suresh Sivanandam, Scott Chapman, Adam Muzzin, Scott Christie, Paul Hickson, Alan McConnachie, Simon Thibault, Jenny Atwood, André Anthony, Marcin Sawicki, Jennifer Dunn, Jae-Joon Lee, Kim Venn, Ruben Diaz, Stephen Goodsell, Shawn Barbod, Martin Tschimmel, Mark Barnet, Gavin Hay, Scott Roberts, Gaetano Sivo, Masen Lamb, Shaojie Chen, Saugata Dutt, Patrick Nkwari, Olivier Lardière, Uriel Conod, Sarik Jeram, Julia Scharwächter

Proceedings Volume 13096, 130960K (2024) https://doi.org/10.1117/12.3020305

KEYWORDS: Spectrographs, Adaptive optics, Imaging systems, Design, Galactic astronomy, Gemini Observatory, Mirrors, Telescopes, Stars, Cryostats, Infrared Imaging Spectrograph, Extragalactic astronomy

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Proceedings Article | 25 August 2022 Presentation + Paper

Presentation + Paper

Reliability estimate for the Thirty Meter Telescope

John Rogers, Bart Fordham, Gelys Trancho, Hessam Khodabakhsh, Frank Thede, Scott Roberts

Proceedings Volume 12187, 121870M (2022) https://doi.org/10.1117/12.2630613

KEYWORDS: Reliability, Observatories, Telescopes, Telecommunications, Systems modeling, Imaging systems, Adaptive optics, Thirty Meter Telescope, Mirrors, Data modeling

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Proceedings Article | 25 August 2022 Presentation + Paper

Presentation + Paper

TMT systems engineering evolution in the last decade

Gelys Trancho, George Angeli, Josh Church, Jamie Dodge, Bart Fordham, Sarah Gajadhar, Nancy Han, Kayla Hardie, Doug McMartin, John Miles, Scott Roberts, John Rogers, Fernando Santoro, Hugh Thompson, Konstantinos Vogiatzis

Proceedings Volume 12187, 121870L (2022) https://doi.org/10.1117/12.2631603

KEYWORDS: Systems engineering, Interfaces, Computer aided design, Observatories, Systems modeling, Standards development, Safety, Reliability, Databases, Control systems

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Inclusion in an international training program for early-career engineers and scientists in the Thirty Meter Telescope partnership

Nicholas McConnell, Austin Barnes, Warren Skidmore, Renate Kupke, Jessica Lu, Scott Roberts, Ravinder Bhatia, Sandra Dawson, Gary Sanders, Lisa Hunter

Proceedings Volume 11449, 114491O (2020) https://doi.org/10.1117/12.2575654

KEYWORDS: Thirty Meter Telescope, Reflectivity, Large telescopes

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Are we there yet? Science-based roadmaps for astronomy technology research and development

Scott Roberts, Alan McConnachie, Dean Chalmers

Proceedings Volume 11450, 1145014 (2020) https://doi.org/10.1117/12.2575982

KEYWORDS: Astronomy, Astrophysics, Radio astronomy, Data analysis, Observatories

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Gemini Infrared Multi-Object Spectrograph: preliminary design overview

Suresh Sivanandam, Scott Chapman, Darren Erickson, Paul Hickson, Simon Thibault, Marcin Sawicki, Adam Muzzin, Jennifer Dunn, Alison Peck, Scott Roberts, Kim Venn, Gaetano Sivo, Martin Tschimmel, David Henderson, Masen Lamb, Shaojie Chen, Saugata Dutt, Olivier Lardière, André Anthony, Alexis Hill, Denis Brousseau, Tristan Chabot

Proceedings Volume 11447, 114471A (2020) https://doi.org/10.1117/12.2561607

KEYWORDS: Spectrographs, Astronomical imaging, Gemini Observatory, Infrared imaging, Infrared spectroscopy, Infrared radiation, Adaptive optics, Imaging systems, Spatial resolution, Spectral resolution

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

On the precision of aero-thermal simulations for TMT: revisited

Konstantinos Vogiatzis, Hugh Thompson, Scott Roberts

Proceedings Volume 10705, 1070504 (2018) https://doi.org/10.1117/12.2312865

KEYWORDS: Spatial resolution, Computer simulations, Turbulence, Thirty Meter Telescope, Observatories, Image quality, Spectral resolution

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Proceedings Article | 10 July 2018 Paper

Paper

Ground layer studies for the alternate TMT site

Konstantinos Vogiatzis, Hugh Thompson, Scott Roberts, Christophe Dumas

Proceedings Volume 10705, 107051N (2018) https://doi.org/10.1117/12.2313039

KEYWORDS: Observatories, Thirty Meter Telescope, Optical turbulence, Computational fluid dynamics, Telescopes, Turbulence

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Optical performance prediction of the Thirty Meter Telescope after initial alignment using optical modeling

Byoung-Joon Seo, Carl Nissly, Mark Colavita, Mitchell Troy, Scott Roberts, John Rogers

Proceedings Volume 10705, 107050T (2018) https://doi.org/10.1117/12.2314351

KEYWORDS: Telescopes, Distortion, Optical alignment, Error analysis, Thirty Meter Telescope, Performance modeling

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Proceedings Article | 8 August 2016 Paper

Paper

A database for TMT interface control documents

Kim Gillies, Scott Roberts, Allan Brighton, John Rogers

Proceedings Volume 9911, 99112Q (2016) https://doi.org/10.1117/12.2234325

KEYWORDS: Human-machine interfaces, Databases, Control systems, Process control, Systems modeling, Data modeling, Systems engineering, Telescopes, Sensors, Interfaces

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Proceedings Article | 4 August 2014 Paper

Paper

Wavefront sensing and control performance modeling of the Thirty Meter telescope for systematic trade analyses

Carl Nissly, Byoung-Joon Seo, Mitchell Troy, Gary Chanan, Scott Roberts, John Rogers

Proceedings Volume 9150, 91500S (2014) https://doi.org/10.1117/12.2057157

KEYWORDS: Telescopes, Wavefronts, Adaptive optics, Wavefront sensors, Space telescopes, Performance modeling, Mirrors, Error analysis, Calibration, Thirty Meter Telescope

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Proceedings Article | 4 August 2014 Paper

Paper

Systems engineering of the Thirty Meter Telescope for the construction phase

Scott Roberts, John Rogers, Hugh Thompson, Konstantinos Vogiatzis, Douglas MacMartin, Eric Wilde, Mitchell Troy, Byoung-Joon Seo, Carl Nissly

Proceedings Volume 9150, 91500V (2014) https://doi.org/10.1117/12.2056870

KEYWORDS: Systems engineering, Observatories, Computer aided design, Control systems, Data modeling, Systems modeling, Performance modeling, Databases, Interfaces, Thirty Meter Telescope

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Proceedings Article | 4 August 2014 Paper

Paper

TMT telescope structure thermal model

Konstantinos Vogiatzis, Amir Sadjadpour, Scott Roberts

Proceedings Volume 9150, 915011 (2014) https://doi.org/10.1117/12.2056582

KEYWORDS: Telescopes, Systems modeling, Thermal modeling, Solid modeling, Mirrors, 3D modeling, Calibration, Electronics, Solids, Thirty Meter Telescope

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Proceedings Article | 22 July 2014 Paper

Paper

Preliminary design study of the TMT Telescope structure system: overview

Tomonori Usuda, Yutaka Ezaki, Noboru Kawaguchi, Kazuhiro Nagae, Atsushi Kato, Junji Takaki, Masaki Hirano, Tomoya Hattori, Masaki Tabata, Yasushi Horiuchi, Yusuke Saruta, Satoru Sofuku, Noboru Itoh, Takeharu Oshima, Takashi Takanezawa, Makoto Endo, Junji Inatani, Masanori Iye, Amir Sadjadpour, Mark Sirota, Scott Roberts, Larry Stepp

Proceedings Volume 9145, 91452F (2014) https://doi.org/10.1117/12.2055767

KEYWORDS: Telescopes, Optical instrument design, Computer aided design, Mirrors, Electroluminescence, Control systems design, Control systems, Earthquakes, Safety, Thirty Meter Telescope

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We present an overview of the preliminary design of the Telescope Structure System (STR) of Thirty Meter Telescope (TMT). NAOJ was given responsibility for the TMT STR in early 2012 and engaged Mitsubishi Electric Corporation (MELCO) to take over the preliminary design work. MELCO performed a comprehensive preliminary design study in 2012 and 2013 and the design successfully passed its Preliminary Design Review (PDR) in November 2013 and April 2014. Design optimizations were pursued to better meet the design requirements and improvements were made in the designs of many of the telescope subsystems as follows: 1. 6-legged Top End configuration to support secondary mirror (M2) in order to reduce deformation of the Top End and to keep the same 4% blockage of the full aperture as the previous STR design. 2. “Double Lower Tube” of the elevation (EL) structure to reduce the required stroke of the primary mirror (M1) actuators to compensate the primary mirror cell (M1 Cell) deformation caused during the EL angle change in accordance with the requirements. 3. M1 Segment Handling System (SHS) to be able to make removing and installing 10 Mirror Segment Assemblies per day safely and with ease over M1 area where access of personnel is extremely difficult. This requires semi-automatic sequence operation and a robotic Segment Lifting Fixture (SLF) designed based on the Compliance Control System, developed for controlling industrial robots, with a mechanism to enable precise control within the six degrees of freedom of position control. 4. CO₂ snow cleaning system to clean M1 every few weeks that is similar to the mechanical system that has been used at Subaru Telescope. 5. Seismic isolation and restraint systems with respect to safety; the maximum acceleration allowed for M1, M2, tertiary mirror (M3), LGSF, and science instruments in 1,000 year return period earthquakes are defined in the requirements. The Seismic requirements apply to any EL angle, regardless of the operational status of Hydro Static Bearing (HSB) system and stow lock pins. In order to find a practical solution, design optimization study for seismic risk mitigation was carried out extensively, including the performing of dynamic response analyses of the STR system under the time dependent acceleration profile of seven major earthquakes. The work is now moving to the final design phase from April 2014 for two years.

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 | 10 November 2011 Paper

Paper

NRCIM integrated opto-mechanical analysis toolset for the Thirty Meter Telescope

Scott Roberts

Proceedings Volume 8336, 83360A (2011) https://doi.org/10.1117/12.914555

KEYWORDS: Zemax, Telescopes, Interfaces, Mirrors, MATLAB, Data modeling, Adaptive optics, Motion models, Systems modeling, Thirty Meter Telescope

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Proceedings Article | 5 August 2010 Paper

Paper

Systems engineering of the Thirty Meter Telescope through integrated opto-mechanical analysis

Scott Roberts

Proceedings Volume 7738, 773818 (2010) https://doi.org/10.1117/12.857661

KEYWORDS: Telescopes, Actuators, Zemax, Systems modeling, Mirrors, Interfaces, Motion models, Data modeling, MATLAB, Transform theory

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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 | 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 | 10 July 2008 Paper

Paper

TMT telescope structure system: design and development progress report

Kei Szeto, Scott Roberts, Mike Gedig, Glenn Austin, Christie Lagally, Steven Patrick, Dominic Tsang, Doug MacMynowski, Mark Sirota, Larry Stepp, Peter Thompson

Proceedings Volume 7012, 70122G (2008) https://doi.org/10.1117/12.787002

KEYWORDS: Telescopes, Optical instrument design, Control systems, Structural design, Safety, Control systems design, Finite element methods, Space telescopes, Earthquakes, Thirty Meter Telescope

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Proceedings Article | 9 July 2008 Paper

Paper

Integrated modeling for the GPi flexure sensitive structure

Darren Erickson, Scott Roberts, John Pazder, J. Murray Fletcher

Proceedings Volume 7017, 701711 (2008) https://doi.org/10.1117/12.788449

KEYWORDS: Zemax, Adaptive optics, Data modeling, Systems modeling, Gemini Planet Imager, Motion models, Finite element methods, MATLAB, Integrated modeling, Interfaces

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Proceedings Article | 7 July 2008 Paper

Paper

Systems engineering for the preliminary design of the Thirty Meter Telescope

George Angeli, Scott Roberts, Konstantinos Vogiatzis

Proceedings Volume 7017, 701704 (2008) https://doi.org/10.1117/12.787220

KEYWORDS: Optical transfer functions, Point spread functions, Telescopes, Observatories, Error analysis, Mirrors, Systems engineering, Atmospheric optics, Image quality, Thirty Meter Telescope

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Proceedings Article | 29 June 2006 Paper

Paper

WFOS: a wide field optical spectrograph for the Thirty Meter Telescope

John Pazder, Scott Roberts, Roberto Abraham, Andre Anthony, Murray Fletcher, Tim Hardy, David Loop, Simon Sun

Proceedings Volume 6269, 62691X (2006) https://doi.org/10.1117/12.672712

KEYWORDS: Cameras, Telescopes, Spectrographs, Sensors, Diffraction gratings, Mirrors, Spectral resolution, Optical design, Imaging spectroscopy, Thirty Meter Telescope

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Proceedings Article | 28 June 2006 Paper

Paper

Evaluation of ground layer adaptive optics for the wide field optical spectrograph on the TMT

Jeff Stoesz, Jean-Pierre Véran, Scott Roberts, Brent Ellerbroek, Matthew Britton

Proceedings Volume 6272, 62724N (2006) https://doi.org/10.1117/12.672578

KEYWORDS: Adaptive optics, Monochromatic aberrations, Mirrors, Point spread functions, Turbulence, Telescopes, Actuators, Sodium, Calibration, Spectrographs

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Proceedings Article | 27 June 2006 Paper

Paper

A conceptual design for the Thirty Meter Telescope adaptive optics systems

B. Ellerbroek, C. Boyer, C. Bradley, M. Britton, S. Browne, R. Buchroeder, J.-L. Carel, M. Cho, M. Chun, R. Clare, R. Conan, L. Daggert, R. Dekany, J. Elias, D. Erickson, R. Flicker, D. Gavel, L. Gilles, P. Hampton, G. Herriot, M. Hunten, R. Joyce, M. Liang, B. Macintosh, R. Palomo, I. Powell, S. Roberts, E. Ruch, J.-C. Sinquin, M. Smith, J. Stoesz, M. Troy, G. Tyler, J.-P. Veran, C. Vogel, Q. Yang

Proceedings Volume 6272, 62720D (2006) https://doi.org/10.1117/12.669422

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Laser guide stars, Wavefronts, Wavefront sensors, Stars, Control systems, Imaging spectroscopy, Imaging systems

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Proceedings Article | 26 June 2006 Paper

Paper

TMT telescope structure system: design and development

Kei Szeto, Scott Roberts, Simon Sun, Larry Stepp, Jerry Nelson, Mike Gedig, Nathan Loewen, Dominic Tsang

Proceedings Volume 6267, 62672Q (2006) https://doi.org/10.1117/12.669731

KEYWORDS: Telescopes, Mirrors, Optical instrument design, Space telescopes, Structural design, Systems modeling, Optical components, Actuators, Image quality, Thirty Meter Telescope

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Proceedings Article | 24 August 2005 Paper

Paper

Optical performance analysis and optimization of large telescope structural designs

Scott Roberts, Simon Sun, Dan Kerley

Proceedings Volume 5867, 58670O (2005) https://doi.org/10.1117/12.618568

KEYWORDS: Mirrors, Telescopes, Actuators, Transform theory, Image segmentation, MATLAB, Data modeling, Structural design, Zemax, Thirty Meter Telescope

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We describe a tool to analyze the effects of gravity induced deflections on a telescope structure with segmented primary mirror optics. An objective of the telescope structural design process is to minimize image quality degradation due to uncorrectable static deflections of the optics under gravity, while ensuring that the overall system meets several requirements including limits of maximum primary mirror actuator stroke, segment rotation and decenter, and secondary mirror actuation. These design and performance criteria are not readily calculated within a finite element program. Our Merit Function routine, implemented in MATLAB and called by ANSYS, calculates these parameters and makes them available within ANSYS for evaluation and design optimization. In this analysis, ANSYS outputs key structural-model nodal displacements to a file, which are used to determine the 6 degree of freedom motion of the telescope's optical surfaces. MATLAB then utilizes these displacements, along with a database containing coordinate system transforms and a linear optics model derived from ZEMAX, to calculate various performance criteria. The values returned to ANSYS can be used to iteratively optimize performance over a set of structural design parameters. Optical parameters calculated by this routine include the optical path difference at the pupil, RMS wavefront, encircled energy and low order Zernike terms resulting from primary mirror segment rotation and decenter. Also reported are the maximum actuator strokes required to restore tip-tilt and piston of the primary mirror segments, and the deflection of the secondary mirror under gravitational load. The merit function routine is being used by the Thirty Meter Telescope (TMT) project to optimize and assess the performance of various telescope structural designs. This paper describes the mathematical basis of the calculations, their implementation and gives preliminary results of the TMT Telescope Structure Reference Design.

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 | 9 December 2004 Paper

Paper

Development of a Canadian large optical telescope

Scott Roberts

Proceedings Volume 5578, (2004) https://doi.org/10.1117/12.567520

KEYWORDS: Telescopes, Mirrors, Adaptive optics, Optical telescopes, Integrated modeling, Optical instrument design, James Webb Space Telescope, Aerodynamics, Astronomy, Thirty Meter Telescope

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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 | 30 September 2004 Paper

Paper

A Canadian wide-field optical spectrograph for a 30-m telescope

Bev Oke, Denis Laurin, Ian Powell, David Crampton, John Pazder, Kei Szeto, Marc Baril, Leslie Saddlemyer, James Stilburn, Scott Roberts

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.552436

KEYWORDS: Telescopes, Cameras, Relays, Spectrographs, Space telescopes, Collimators, Mirrors, Diffraction gratings, Charge-coupled devices, Lenses

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Proceedings Article | 24 September 2004 Paper

Paper

Durable coatings for large segmented mirrors

Simon Thibault, Michel Poirier, Samir Ilias, Luc Levesque, Les Saddlemye, Scott Robert, Dennis Crabtree

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.552642

KEYWORDS: Reflectivity, Sputter deposition, Thin films, Mirrors, Thin film coatings, Dielectrics, Ions, Gas lasers, Optical coatings, Aluminum

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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 | 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

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

Model order reduction of structural dynamics of a very large optical telescope

Raymond Yu, Scott Roberts, Inna Sharf

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552499

KEYWORDS: Telescopes, Mirrors, Systems modeling, Structural dynamics, Integrated modeling, Space telescopes, Actuators, Finite element methods, Control systems, Performance modeling

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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

The optical modeling tools for the Canadian Very Large Optical Telescope integrated model

John Pazder, Scott Roberts, Malcolm Smith, Jean-Francois Lavigne, Hannah McKenzie

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566266

KEYWORDS: Mirrors, Zemax, Ray tracing, Integrated modeling, Wavefronts, Telescopes, Data modeling, Image quality, Integrated optics, MATLAB

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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 | 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 March 2003 Paper

Paper

Six degree-of-freedom positioner for optical components

Robert Gaunt, Scott Roberts, Andre Anthony

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460441

KEYWORDS: Mirrors, Kinematics, Actuators, Off axis mirrors, Optical components, Mirror mounts, Adaptive optics, Optical alignment, Telescopes, Matrices

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Proceedings Article | 7 March 2003 Paper

Paper

Gemini-North multi-object spectrograph integration, test and commissioning

Isobel Hook, Jeremy Allington-Smith, Steven Beard, David Crampton, Roger Davies, Colin Dickson, Angelic Ebbers, J. Murray Fletcher, Inger Jorgensen, I. Jean, S. Juneau, Richard Murowinski, Robert Nolan, Ken Laidlaw, Brian Leckie, G. Marshall, Terry Purkins, Ian Richardson, Scott Roberts, Douglas Simons, Malcolm Smith, James Stilburn, Kei Szeto, Chris Tierney, Richard Wolff, Robert Wooff

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461526

KEYWORDS: Telescopes, Gemini Observatory, Sensors, Image quality, Astronomical imaging, Spectrographs, Charge-coupled devices, Imaging spectroscopy, Molybdenum, Optical filters

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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

Mechanically actuated reconfigurable slits (MARS) for visible and infrared multi-object spectrographs

Scott Roberts, Carrie Abbott, Andre Anthony, Daniel Booy, Robert Gaunt, Alexis Hill, Geoff Kabush, Andrew McIlwain, Karen Taylor, Ben Townsend, Robert Vrooman

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395419

KEYWORDS: Mars, Actuators, Cryogenics, Spectrographs, Space telescopes, Molybdenum, Telescopes, Sensors, Astronomical imaging, Infrared radiation

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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 | 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 | 7 July 2000 Paper

Paper

Progress on Altair: the Gemini North adaptive optics system

Glen Herriot, Simon Morris, Andre Anthony, Dennis Derdall, Dave Duncan, Jennifer Dunn, Angelic Ebbers, J. Murray Fletcher, Tim Hardy, Brian Leckie, A. Mirza, Christopher Morbey, M. Pfleger, Scott Roberts, Philip Shott, M. Smith, Leslie Saddlemyer, Jerry Sebesta, Kei Szeto, Robert Wooff, W. Windels, Jean-Pierre Veran

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390288

KEYWORDS: Mirrors, Stars, Telescopes, Adaptive optics, Gemini Observatory, Deformable mirrors, Control systems, Laser guide stars, Wavefront sensors, Actuators

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Proceedings Article | 11 September 1998 Paper

Paper

Optomechanical design of Altair, the Gemini adaptive optics system

Scott Roberts, Gurjeet Singh

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321627

KEYWORDS: Optical benches, Wavefront sensors, Mirrors, Electronics, Telescopes, Adaptive optics, Tolerancing, Space telescopes, Optical design, Gemini Observatory

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Proceedings Article | 11 September 1998 Paper

Paper

Innovations in Gemini adaptive optics system design

Glen Herriot, Simon Morris, Scott Roberts, J. Murray Fletcher, Leslie Saddlemyer, Gurjeet Singh, Jean-Pierre Veran, Eric Richardson

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321684

KEYWORDS: Stars, Mirrors, Telescopes, Gemini Observatory, Adaptive optics, Control systems, Laser guide stars, Calibration, Wavefront sensors, Actuators

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Proceedings Article | 9 July 1998 Paper

Paper

Gemini multiobject spectrograph: a flexure critical design

Kei Szeto, Richard Murowinski, Scott Roberts, Leslie Saddlemyer, Richard Bennett, Colin Dickson, Peter Hastings

Proceedings Volume 3355, (1998) https://doi.org/10.1117/12.316824

KEYWORDS: Sensors, Telescopes, Spectrographs, Gemini Observatory, Finite element methods, Collimators, Wavefront sensors, Cameras, Image quality, Control systems

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Proceedings Article | 9 July 1998 Paper

Paper

Gemini multiobject spectrographs

Richard Murowinski, Tim Bond, David Crampton, Timothy Davidge, J. Murray Fletcher, Brian Leckie, Christopher Morbey, Scott Roberts, Leslie Saddlemyer, Jerry Sebesta, James Stilburn, Kei Szeto, Jeremy Allington-Smith, Robert Content, Roger Davies, George Dodsworth, Roger Haynes, David Robinson, David Robertson, John Webster, David Lee, Steven Beard, Colin Dickson, Dennis Kelly, R. Bennet, Maureen Ellis, Peter Hastings, Phil Williams

Proceedings Volume 3355, (1998) https://doi.org/10.1117/12.316838

KEYWORDS: Gemini Observatory, Telescopes, Spectrographs, Imaging spectroscopy, Image quality, Astronomical imaging, Image processing, Performance modeling, Sensors, Optical components

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Proceedings Article | 13 October 1997 Paper

Paper

Optomechanical design of the Gemini multiobject spectrograph on-instrument wavefront sensor

Scott Roberts, J. Murray Fletcher, Brian Leckie, Leslie Saddlemyer, Kei Szeto, Jerry Sebesta

Proceedings Volume 3132, (1997) https://doi.org/10.1117/12.279099

KEYWORDS: Telescopes, Wavefront sensors, Mirrors, Gemini Observatory, Spectrographs, Kinematics, Astronomical imaging, Vignetting, Error analysis, Charge-coupled devices

Proceedings Article | 21 March 1997 Paper

Paper

GMOS: the GEMINI Multiple Object Spectrographs

Roger Davies, Jeremy Allington-Smith, P. Bettess, E. Chadwick, Robert Content, George Dodsworth, Roger Haynes, David Lee, Ian Lewis, John Webster, Eli Ettedgui-Atad, Steven Beard, Maureen Ellis, Peter Hastings, Phil Williams, Tim Bond, David Crampton, Timothy Davidge, J. Murray Fletcher, Brian Leckie, Christopher Morbey, Richard Murowinski, Scott Roberts, Leslie Saddlemyer, Jerry Sebesta, James Stilburn, Kei Szeto

Proceedings Volume 2871, (1997) https://doi.org/10.1117/12.268996

KEYWORDS: Spectrographs, Gemini Observatory, Imaging spectroscopy, Image quality, Spectroscopy, Telescopes, Sensors, Galactic astronomy, Stars, Atmospheric optics

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Proceedings Article | 21 March 1997 Paper

Paper

Fabrication of narrow-slit masks for the Gemini Multiobject Spectrograph

Kei Szeto, James Stilburn, Tim Bond, Scott Roberts, Jerry Sebesta, Leslie Saddlemyer

Proceedings Volume 2871, (1997) https://doi.org/10.1117/12.269017

KEYWORDS: Carbon, Mask making, Gemini Observatory, Telescopes, Laser cutting, Laser systems engineering, Spectrographs, Astronomical imaging, Nd:YAG lasers, Imaging spectroscopy

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Showing 5 of 56 publications

Proceedings Volume Editor (2)

SPIE Conference Volume | 12 September 2024

Modeling, Systems Engineering, and Project Management for Astronomy XI

SPIE Conference Volume | 16 November 2004

Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers

Conference Committee Involvement (9)

Modeling, Systems Engineering, and Project Management for Astronomy XI

16 June 2024 | Yokohama, Japan

Modeling, Systems Engineering, and Project Management for Astronomy X

17 July 2022 | Montréal, Québec, Canada

Modeling, Systems Engineering, and Project Management for Astronomy IX

14 December 2020 | Online Only, California, United States

Modeling, Systems Engineering, and Project Management for Astronomy IX

13 December 2020 | San Diego, California, United States

Modeling, Systems Engineering, and Project Management for Astronomy VIII

10 June 2018 | Austin, Texas, United States

Showing 5 of 9 Conference Committees

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