Dr. Neil Rowlands Profile

Dr. Neil Rowlands

Engineering Fellow at Honeywell Aerospace

SPIE Involvement:

Author

Publications (51)

SPIE Journal Paper | 28 December 2024

Zenith: Defense Advanced Research Projects Agency’s liquid mirror telescope program

Michael Nayak, Denis Brousseau, Amanda Childers, Tomu Hisakado, Kristyn Kadala, Rebecca Kamire, Yifan Li, Dhanushkodi Durai Mariappan, Greg Radighieri, Alvaro Romero-Calvo, Neil Rowlands, Paul Schroeder, Grey Tarkenton, Simon Thibault, Devin Vollmer, Santanu Basu, Kaushik Iyer

JATIS, Vol. 10, Issue 04, 044013, (December 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.4.044013

KEYWORDS: Liquids, Magnetism, Mirror surfaces, Mirrors, Control systems, Wavefront errors, Mercury, Analytic models, Optical surfaces, Telescopes

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Proceedings Article | 1 October 2024 Open Access

Open Access

Presentation + Paper

Enhanced training through the NSERC CREATE program on New Technologies for Canadian Observatories (NTCO)

Kim Venn, Simon Thibault, Tammy McLash, Clare Higgs, Dave Andersen, Colin Bradley, Olivier Daigle, René Doyon, Bryan Gaensler, Frederic Grandmont, JJ Kavelaars, Scot Kleinman, Brenda Matthews, Neil Rowlands, Stephen Se, Luc Simard, Suresh Sivanandam, Christine Wilson

Proceedings Volume 13128, 1312803 (2024) https://doi.org/10.1117/12.3029594

KEYWORDS: Education and training, Internships, Industry, Astronomy, Observatories, Astronomical instrumentation, Engineering, Telescopes, Physics, Industrial applications

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Proceedings Article | 27 August 2024 Presentation + Paper

Presentation + Paper

JWST FGS tracking performance during the DART observations

Neil Rowlands

Proceedings Volume 13103, 131030X (2024) https://doi.org/10.1117/12.3020758

KEYWORDS: Stars, James Webb Space Telescope, Point spread functions, Observatories, Sensors, Equipment, Sampling rates, Detector arrays, Mercury cadmium telluride

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Like many telescopes around the world, JWST was tasked to observe the double asteroid system Didymos / Dimorphos during the impact of NASA’s Double Asteroid Rendezvous Test (DART) spacecraft on Dimorphos on Sept 28, 2022. At the date of the test, the target asteroids were moving with a rate of ~110 milli-arcseconds per second across the JWST field of view, almost four times the nominal design rate for JWST’s moving target tracking mode. To help ensure that some data was acquired, eleven different observations were acquired with different guide stars, seven with Guider 1 and four with Guider 2. The large number of observations and the high motion rate provided an unprecedented opportunity to evaluate FGS performance across approximately half the field of view of both guiders. The DART tracking data provides an opportunity to examine guider performance across a wide area of the 5μm cutoff H2RG HgCdTe arrays employed in the guiders, providing a means to measure the systematic offset in the centroid as the PSF moves across, and is sampled by, the pixel grid. Systematic offsets in the centroid are of interest because they could create undesirable offsets in the pointing of the science instruments. An FFT analysis of the centroid time-series was used to identify the spatial scales and magnitudes of these centroid offsets. The expected systematic offset magnitude in the centroid due to the pixel sampling scale should be on the order of ~2 milli-arcseconds, with a corresponding variation in the count rate of 6 to 8%. The observed Guider 2 performance meets both expectations, while the results for Guider 1 show significantly larger variations in the reported count rate, likely due to the greater degree of ‘cross-hatching’ on the Guider 1 detector array. Despite these significantly larger count rate variations, the systematic offset variations observed on Guider 1 were found to be similar Guider 2 and thus consistent with expectations. This somewhat surprising result may be due to charge migration effectively blurring the detected point spread function.

Proceedings Article | 26 August 2024 Poster + Paper

Poster + Paper

Development of a self-assembling ferrofluidic ionic liquid mirror

Neil Rowlands, Álvaro Romero-Calvo, David Strafford, Rebecca Kamire, Amanda Childers, Stephen Yates, Emir Rahislic, Jason Smoke, Sheng-Hai Zheng, Peter Cameron, Gabriel Cano-Gómez, Hugh Chen, Tianyang Hu, Eric Comstock, Miguel Herrada

Proceedings Volume 13100, 131007H (2024) https://doi.org/10.1117/12.3020718

KEYWORDS: Liquids, Magnetism, Mirrors, Mirror surfaces, Interfaces, Modeling, Reflection, Nanoparticles, Prototyping, Particles

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Proceedings Article | 26 August 2024 Presentation + Paper

Presentation + Paper

Zenith: DARPA’s liquid mirror telescope program

Michael Nayak, Denis Brousseau, Amanda Childers, Tomu Hisakado, Kristyn Kadala, Rebecca Kamire, Yifan Li, Dhanushkodi Mariappan, Greg Radighieri, Alvaro Romero-Calvo, Neil Rowlands, Paul Schroeder, Grey Tarkenton, Simon Thibault, Devin Vollmer, Santanu Basu, Kaushik Iyer

Proceedings Volume 13100, 1310037 (2024) https://doi.org/10.1117/12.3020080

KEYWORDS: Liquids, Magnetism, Mirrors, Mirror surfaces, Control systems, Analytic models, Telescopes, Mercury, Modeling, Optical surfaces

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SPIE Journal Paper | 18 March 2020 Open Access

Open Access

Quantum yield estimation for an electron-multiplying charge-coupled device from photon counting test data

Robert Gleisinger, Neil Rowlands, Alan Scott, Olivier Daigle

JATIS, Vol. 6, Issue 01, 011008, (March 2020) https://doi.org/10.1117/12.10.1117/1.JATIS.6.1.011008

KEYWORDS: Quantum efficiency, Electrons, Silicon, Charge-coupled devices, Ultraviolet radiation, Sensors, Electron multiplying charge coupled devices, Reflectivity, Photon counting, Crystals

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Proceedings Article | 12 August 2019 Open Access

Open Access

Paper

The impact of the brighter-fatter effect on the performance of the JWST fine guidance sensor (Erratum)

Neil Rowlands, Calvin Midwinter, Gerry Warner

Proceedings Volume 10709, 1070938 (2019) https://doi.org/10.1117/12.2550403

KEYWORDS: James Webb Space Telescope, Sensors, Infrared sensors, Aerospace engineering, Astronomical imaging, Infrared detectors, Astronomy, Astronomical telescopes

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Proceedings Article | 1 August 2018 Presentation + Paper

Presentation + Paper

The impact of the brighter-fatter effect on the performance of the JWST fine guidance sensor

Neil Rowlands, Calvin Midwinter, Gerry Warner

Proceedings Volume 10709, 107091K (2018) https://doi.org/10.1117/12.2312338

KEYWORDS: Point spread functions, Sensors, James Webb Space Telescope, Stars, Signal attenuation, Signal detection, Mercury cadmium telluride, Infrared sensors, Capacitance, Device simulation

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Proceedings Article | 20 July 2018 Paper

Paper

Ultraviolet sensitivity of a teledyne-e2v EMCCD

Neil Rowlands, Ken Smith, Olivier Daigle, Oleg Djazovski, Alan Scott, Alexander Beaton, Andrew Wilson

Proceedings Volume 10709, 107090D (2018) https://doi.org/10.1117/12.2313022

KEYWORDS: Quantum efficiency, Electron multiplying charge coupled devices, Ultraviolet radiation, Photons, Photodiodes, Silicon, Sensors, Visible radiation

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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 with MCP performance. We approached Teledyne-e2v and they confirmed that a backside thinned EMCCD with their ‘astro no-coat’ process should provide reasonable quantum efficiency (ie. > 30%) in this range. The primary application in which we are interested is UV imaging of the aurora from space-based platforms. In this application there are system level advantages to replacing an MCP based detector with an EMCCD which is directly sensitive to UV illumination, namely the elimination of a high voltage power supply and higher spatial resolution. An MCP produces an electron shower which degrades image quality and also requires a relatively thick detector window which has to be accommodated in the imager optical design. We acquired five CCD201 engineering model EMCCDs with e2v’s ‘astro no-coat’ process, and incorporated one of these into a standard flexible liquid nitrogen cooled EMCCD camera produced by Nüvü Camēras. Once installed the EMCCD operation was confirmed with standard Nüvü Camēras test procedures. The camera was then mounted in a test vacuum chamber along with a McPherson UV monochromator so that the UV performance could be assessed. A NIST traceable photodiode was used for the absolute calibration. The resulting intrinsic QE was found to be 34% at 180 nm rising to 44% at 150 nm. The quantum yield was found to be quite low, only a few percent at 180 nm rising to only 1.13-1.18 at 150 nm. This is considerably lower than comparable results from CCDs where delta-doping has been used to improve the responsive quantum efficiency and also lower than a Teledyne-e2v CMOS sensor with the same surface treatment.

Proceedings Article | 25 September 2017 Open Access

Open Access

Paper

Fine guidance sensor/near-infrared imager and slitless spectrograph on James Webb Space Telescope: pupil alignment methodology and metrology

M. Maszkiewicz, N. Rowlands, D. Aldridge, A. Beaton, S. Delamer, Sheng-Hai Zheng, R. Ohl, P. Coulter

Proceedings Volume 10562, 1056223 (2017) https://doi.org/10.1117/12.2296043

KEYWORDS: Mirrors, Error analysis, Sensors, James Webb Space Telescope, Readout integrated circuits, Interfaces, Received signal strength, Optical alignment, Astronomical imaging, Metrology

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Proceedings Article | 27 September 2016 Presentation + Paper

Presentation + Paper

Optical testing and verification methods for the James Webb Space Telescope Integrated Science Instrument Module element

Scott Antonille, Cherie Miskey, Raymond Ohl, Scott Rohrbach, David Aronstein, Andrew Bartoszyk, Charles Bowers, Emmanuel Cofie, Nicholas Collins, Brian Comber, William Eichhorn, Alistair Glasse, Renee Gracey, George Hartig, Joseph Howard, Douglas Kelly, Randy Kimble, Jeffrey Kirk, David Kubalak, Wayne Landsman, Don Lindler, Eliot Malumuth, Michael Maszkiewicz, Marcia Rieke, Neil Rowlands, Derek Sabatke, Corbett Smith, J. Scott Smith, Joseph Sullivan, Randal Telfer, Maurice Te Plate, M. Begoña Vila, Gerry Warner, David Wright, Raymond Wright, Julia Zhou, Thomas Zielinski

Proceedings Volume 9951, 995105 (2016) https://doi.org/10.1117/12.2238838

KEYWORDS: James Webb Space Telescope, Optical components, Space telescopes, Optical testing, Sensors, Calibration, Data modeling, Human-machine interfaces, Error analysis, Analytical research

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Proceedings Article | 29 July 2016 Paper

Paper

Updated cryogenic performance test results for the flight model JWST fine guidance sensor

Neil Rowlands, Alexander Beaton, Pierre Chayer, Craig Haley, Calvin Midwinter, Kevin Volk, Gerry Warner, Julia Zhou

Proceedings Volume 9904, 99044D (2016) https://doi.org/10.1117/12.2232172

KEYWORDS: James Webb Space Telescope, Cryogenics, Sensors, Space telescopes, Observatories, Stars, Quantum efficiency, Staring arrays, Optical components, Signal detection

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Proceedings Article | 29 July 2016 Paper

Paper

Canadian contributions studies for the WFIRST instruments

J.-F. Lavigne, N. Rowlands, F. Grandmont, D. Lafrenière, C. Marois, O. Daigle, S. Thibault, D. Schade, É. Artigau, D. Brousseau, J. Maire, G. Cretot-Richert, M.-È. Ducharme, L. Levesque, D. Laurin, J. Dupuis

Proceedings Volume 9904, 990413 (2016) https://doi.org/10.1117/12.2232641

KEYWORDS: Electron multiplying charge coupled devices, Image processing, Planets, Sensors, Calibration, Coronagraphy, Stars, Iterated function systems, Cameras, Mirrors

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Proceedings Article | 23 July 2014 Paper

Paper

Digital frequency domain multiplexing readout electronics for the next generation of millimeter telescopes

Amy Bender, Jean-François Cliche, Tijmen de Haan, Matt Dobbs, Adam Gilbert, Joshua Montgomery, Neil Rowlands, Graeme Smecher, Ken Smith, Andrew Wilson

Proceedings Volume 9153, 91531A (2014) https://doi.org/10.1117/12.2054949

KEYWORDS: Bolometers, Electronics, Multiplexing, Field programmable gate arrays, Sensors, Nulling interferometry, Telescopes, Superconductors, Space telescopes, Digital electronics

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Proceedings Article | 23 July 2014 Paper

Paper

Candidate detector assessment for the CASTOR mission

Alan Scott, Patrick Cote, Neil Rowlands, Olivier Daigle

Proceedings Volume 9154, 91542C (2014) https://doi.org/10.1117/12.2057033

KEYWORDS: Sensors, Silicon, Staring arrays, Charge-coupled devices, Quantum efficiency, Ultraviolet radiation, Electron multiplying charge coupled devices, Silicon carbide, Photons, Back illuminated sensors

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Proceedings Article | 23 July 2014 Paper

Paper

Asymmetry in the noise equivalent angle performance of the JWST fine guidance sensor

Neil Rowlands, Gerry Warner, Loic Albert, Tim Hardy, Judith Pipher, John Hutchings, Rene Doyon

Proceedings Volume 9154, 91540L (2014) https://doi.org/10.1117/12.2057311

KEYWORDS: Interference (communication), Signal to noise ratio, Stars, Sensors, James Webb Space Telescope, Point spread functions, Data modeling, Electrons, Capacitance, Image processing

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Proceedings Article | 25 September 2012 Paper

Paper

Pixel classification for the JWST fine guidance sensor

Neil Rowlands, Gerry Warner, Charles Berndt, Loic Albert, Pierre Chayer

Proceedings Volume 8453, 845313 (2012) https://doi.org/10.1117/12.926678

KEYWORDS: Sensors, James Webb Space Telescope, Imaging systems, Staring arrays, Cadmium sulfide, Image processing, Data conversion, Detector arrays, Signal detection, Space telescopes

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Proceedings Article | 21 September 2012 Paper

Paper

Cryogenic performance test results for the flight model JWST fine guidance sensor

Neil Rowlands, Sandra Delamer, Craig Haley, Eric Harpell, Maria Vila, Gerry Warner, Julia Zhou

Proceedings Volume 8442, 84423K (2012) https://doi.org/10.1117/12.926672

KEYWORDS: Stars, James Webb Space Telescope, Cryogenics, Sensors, Space telescopes, Observatories, Cadmium sulfide, Point spread functions, Performance modeling, Optical fabrication

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Proceedings Article | 21 September 2012 Paper

Paper

The JWST Fine Guidance Sensor (FGS) and Near-Infrared Imager and Slitless Spectrograph (NIRISS)

René Doyon, John Hutchings, Mathilde Beaulieu, Loic Albert, David Lafrenière, Chris Willott, Driss Touahri, Neil Rowlands, Micheal Maszkiewicz, Alex Fullerton, Kevin Volk, André Martel, Pierre Chayer, Anand Sivaramakrishnan, Roberto Abraham, Laura Ferrarese, Ray Jayawardhana, Doug Johnstone, Michael Meyer, Judith Pipher, Marcin Sawicki

Proceedings Volume 8442, 84422R (2012) https://doi.org/10.1117/12.926578

KEYWORDS: Sensors, Spectroscopy, Imaging spectroscopy, Stars, Exoplanets, James Webb Space Telescope, Atmospheric modeling, Imaging systems, Point spread functions, Spectrographs

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Proceedings Article | 21 September 2012 Paper

Paper

Space environment challenges with the tunable Fabry-Perot etalon for the JWST fine guidance sensor

Craig Haley, Niladri Roy, Zeljko Osman, Neil Rowlands, Alan Scott

Proceedings Volume 8442, 84423M (2012) https://doi.org/10.1117/12.927026

KEYWORDS: Fabry–Perot interferometers, Sensors, Ferroelectric materials, James Webb Space Telescope, Cryogenics, Electrochemical etching, Silicon, Prototyping, Space telescopes, Control systems

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Proceedings Article | 3 September 2010 Paper

Paper

Cryogenic testing of detector alignment of the Fine Guidance Sensor for the James Webb Space Telescope

Sandra Delamer, Sandy Beaton, David Aldridge, Peter Klimas, Gerry Warner, Shenghai Zheng, James Gallagher, Frédéric Grandmont, Neil Rowlands

Proceedings Volume 7793, 779308 (2010) https://doi.org/10.1117/12.860904

KEYWORDS: Sensors, Cryogenics, Readout integrated circuits, James Webb Space Telescope, Space telescopes, Optical fabrication, Mirrors, Optical benches, Optical alignment, Telescopes

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Proceedings Article | 28 August 2010 Paper

Paper

Tunable filter imager for JWST: etalon opto-mechanical design and test results

D. Touahri, P. Cameron, C. Evans, C. Haley, Z. Osman, A. Scott, N. Rowlands

Proceedings Volume 7808, 78081K (2010) https://doi.org/10.1117/12.860849

KEYWORDS: Fabry–Perot interferometers, Coating, James Webb Space Telescope, Tunable filters, Imaging systems, Ferroelectric materials, Cryogenics, Sensors, Infrared imaging, Infrared radiation

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Proceedings Article | 11 August 2010 Paper

Paper

Speckle differential imagery performance using a JWST tunable filter etalon prototype

P. Ingraham, R. Doyon, M. Beaulieu, N. Rowlands, A. Scott

Proceedings Volume 7731, 77313R (2010) https://doi.org/10.1117/12.856286

KEYWORDS: Fabry–Perot interferometers, Speckle, Calibration, James Webb Space Telescope, Point spread functions, Tunable filters, Prototyping, Sensors, Capacitance, Space telescopes

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Proceedings Article | 11 August 2010 Paper

Paper

Characterization of the tunable filter imager etalon on the JWST Fine Guidance Sensor

Craig Haley, Clinton Evans, Eric Grant, Rodney Norman, Zeljko Osman, Neil Rowlands, Niladry Roy, Alan Scott, Driss Touahri

Proceedings Volume 7731, 77313L (2010) https://doi.org/10.1117/12.857906

KEYWORDS: Fabry–Perot interferometers, Electrochemical etching, Ferroelectric materials, James Webb Space Telescope, Sensors, Electronics, Tunable filters, Control systems, Reflectivity, Imaging systems

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Proceedings Article | 5 August 2010 Paper

Paper

The JWST tunable filter imager (TFI)

R. Doyon, J. Hutchings, N. Rowlands, C. Evans, E. Greenberg, C. Haley, A. Scott, D. Touahri, M. Beaulieu, D. Lafrenière, R. Abraham, E. Barton, P. Chayer, L. Ferrarese, A. Fullerton, R. Jayawardhana, D. Johnstone, A. Martel, A. W. M. R. Meyer, J. Pipher, K. Saad, M. Sawicki, A. Sivaramakrishnan, K. Volk

Proceedings Volume 7731, 77310F (2010) https://doi.org/10.1117/12.857382

KEYWORDS: Fabry–Perot interferometers, James Webb Space Telescope, Coronagraphy, Coating, Sensors, Exoplanets, Imaging systems, Tunable filters, Spectral resolution, Space telescopes

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Proceedings Article | 29 July 2010 Paper

Paper

Lunar liquid mirror telescope: structural concepts

Peter Klimas, Neil Rowlands, Paul Hickson, Ermanno Borra, Simon Thibault

Proceedings Volume 7732, 77322U (2010) https://doi.org/10.1117/12.858198

KEYWORDS: Mirrors, Space telescopes, Telescopes, Liquids, James Webb Space Telescope, Mirror structures, Ultraviolet telescopes, Ultraviolet radiation, Solids, Structural design

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Proceedings Article | 20 July 2010 Paper

Paper

Detector characterization for the JWST fine guidance sensor

Neil Rowlands, Gerry Warner, Charles Berndt, Earl Hartwig

Proceedings Volume 7742, 77421T (2010) https://doi.org/10.1117/12.858193

KEYWORDS: Sensors, Cadmium sulfide, James Webb Space Telescope, Staring arrays, Imaging systems, Electronics, Electrons, Space telescopes, Detector arrays, Signal detection

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Proceedings Article | 20 July 2010 Paper

Paper

IMAKA: imaging from MAuna KeA optical design

Clinton Evans, Hua Lin, Ashley McColgan, Neil Rowlands, Derrick Salmon

Proceedings Volume 7735, 773537 (2010) https://doi.org/10.1117/12.857285

KEYWORDS: Mirrors, Sensors, Optical design, Telescopes, Deformable mirrors, Relays, Image quality, Imaging systems, Adaptive optics, Reflectivity

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Proceedings Article | 15 July 2010 Paper

Paper

Detection and repair of radiation induced single event upsets in an FPGA-based readout for TES bolometer arrays

Graeme Smecher, François Aubin, Oleg Djazovski, Matt Dobbs, Gordon Faulkner, Fabio Gulino, Peter Hyland, Kevin MacDermid, Neil Rowlands

Proceedings Volume 7741, 77412U (2010) https://doi.org/10.1117/12.858201

KEYWORDS: Field programmable gate arrays, Logic, Digital signal processing, Bolometers, Space telescopes, Telescopes, Electronics, Sensors, Multiplexing, Control systems

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Proceedings Article | 12 July 2008 Paper

Paper

The JWST tunable filter imager (TFI)

R. Doyon, N. Rowlands, J. Hutchings, C. Evans, E. Greenberg, A. Scott, D. Touhari, M. Beaulieu, R. Abraham, L. Ferrarese, A. Fullerton, R. Jayawardhana, D. Johnston, M. R. Meyer, J. Pipher, M. Sawicki

Proceedings Volume 7010, 70100X (2008) https://doi.org/10.1117/12.789504

KEYWORDS: Coronagraphy, James Webb Space Telescope, Coating, Fabry–Perot interferometers, Imaging systems, Exoplanets, Tunable filters, Sensors, Reflectivity, Mirrors

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Proceedings Article | 12 July 2008 Paper

Paper

JWST tunable filter imager: etalon prototype test results

D. Touahri, P. Cameron, C. Evans, E. Greenberg, N. Rowlands, A. Scott, R. Doyon, M. Beaulieu, O. Djazovski

Proceedings Volume 7010, 701038 (2008) https://doi.org/10.1117/12.790282

KEYWORDS: Fabry–Perot interferometers, Ferroelectric materials, Coating, James Webb Space Telescope, Prototyping, Tunable filters, Sensors, Imaging systems, Cryogenics, Spectroscopy

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Proceedings Article | 12 July 2008 Paper

Paper

JWST fine guidance sensor: guiding performance analysis

N. Rowlands, M. Vila, C. Evans, D. Aldridge, D.-L. Desaulniers, J. Hutchings, J. Dupuis

Proceedings Volume 7010, 701036 (2008) https://doi.org/10.1117/12.790267

KEYWORDS: Point spread functions, Stars, James Webb Space Telescope, Performance modeling, Observatories, Sensors, Electronics, Mirrors, Monte Carlo methods, Data modeling

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Proceedings Article | 9 July 2008 Paper

Paper

Optical-mechanical operation of the F2T2 filter: a tunable filter designed to search for First Light

Erin Mentuch, Alan Scott, Roberto Abraham, Elizabeth Barton, Matthew Bershady, Joss Bland-Hawthorn, David Crampton, René Doyon, Steve Eikenberry, Mike Gladders, Karl Glazebrook, Joe Jenson, Jeff Julian, Roger Julian, Jean-Paul Kneib, David Loop, Nick Raines, Neil Rowlands, J. D. Smith

Proceedings Volume 7014, 701476 (2008) https://doi.org/10.1117/12.789692

KEYWORDS: Fabry–Perot interferometers, Tunable filters, Optical filters, Calibration, Gemini Observatory, Galactic astronomy, James Webb Space Telescope, Observatories, Image filtering, Spectroscopy

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Proceedings Article | 27 June 2006 Paper

Paper

Performance of F2T2 tandem tunable etalon

Alan Scott, Maniyar Javed, Roberto Abraham, Steve Eikenberry, Elizabeth Barton, Matthew Bershady, Joss Bland-Hawthorn, David Crampton, Rene Doyon, Jeff Julian, Roger Julian, Jean-Paul Kneib, David Loop, Nick Raines, Neil Rowlands, J. Smith

Proceedings Volume 6269, 62695J (2006) https://doi.org/10.1117/12.668774

KEYWORDS: Fabry–Perot interferometers, Gemini Observatory, Spectral resolution, Calibration, Space telescopes, Telescopes, Control systems, Electronics, Device simulation, Digital signal processing

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Proceedings Article | 27 June 2006 Paper

Paper

Extreme adaptive optics for the Thirty Meter Telescope

Bruce Macintosh, Mitchell Troy, Rene Doyon, James Graham, Kevin Baker, Brian Bauman, Christian Marois, David Palmer, Donald Phillion, Lisa Poyneer, Ian Crossfield, Philip Dumont, B. Marty Levine, Michael Shao, Gene Serabyn, Chris Shelton, Gautum Vasisht, James Wallace, Jean-Francois Lavigne, Philippe Valee, Neil Rowlands, Ken Tam, Daniel Hackett

Proceedings Volume 6272, 62720N (2006) https://doi.org/10.1117/12.672032

KEYWORDS: Planets, Adaptive optics, Nulling interferometry, Stars, Telescopes, Wavefront sensors, Sensors, Point spread functions, Wavefronts, Thirty Meter Telescope

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Proceedings Article | 30 December 2004 Paper

Paper

Miniature spectrometers for planetary remote sensing

Alan Scott, Neil Rowlands, Andrew Bell

Proceedings Volume 5660, (2004) https://doi.org/10.1117/12.580833

KEYWORDS: Spectrometers, Spectral resolution, Sensors, Fourier transforms, Remote sensing, Waveguides, Fabry–Perot interferometers, Prisms, Heterodyning, Mirrors

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Proceedings Article | 30 November 2004 Paper

Paper

GWIM: a satellite instrument for gravity wave characterization

Robert Lowe, Neil Rowlands, Marco Olivieri

Proceedings Volume 5571, (2004) https://doi.org/10.1117/12.566791

KEYWORDS: Airglow, Sensors, Satellites, Imaging systems, Clouds, Calibration, Signal to noise ratio, Atmospheric propagation, Atmospheric modeling, Modulation transfer functions

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Proceedings Article | 12 October 2004 Paper

Paper

The James Webb Space Telescope science instrument suite: an overview of optical designs

Pamela Davila, Brent Bos, James Contreras, Clinton Evans, Matthew Greenhouse, Gurnie Hobbs, Wolfgang Holota, Lynn Huff, John Hutchings, Thomas Jamieson, Paul Lightsey, Chris Morbey, Richard Murowinski, Marcia Rieke, Neil Rowlands, Bruce Steakley, Martyn Wells, Maurice te Plate, Gillian Wright

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552053

KEYWORDS: Mirrors, Near infrared, Spectroscopy, James Webb Space Telescope, Imaging systems, Sensors, Optical design, Cameras, Coronagraphy, Staring arrays

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Proceedings Article | 12 October 2004 Paper

Paper

The JWST fine guidance sensor

Neil Rowlands, David Aldridge, Richard Allen, Clinton Evans, Phil Gregory, Earl Hartwig, Brian Mackay, John Metcalfe, Gareth Richardson, Dwight Caldwell, Robert Deschambault, Terry Girard, John Hackett, Dennis Henry, John Hutchings, Chris Morbey, Richard Murowinski, Rene Doyon, Russ Alexander

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551929

KEYWORDS: Tunable filters, James Webb Space Telescope, Sensors, Electronics, Mirrors, Stars, Space operations, Interfaces, Control systems, Optical filters

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Proceedings Article | 12 October 2004 Paper

Paper

Tunable filters for JWST Fine Guidance Sensor

Neil Rowlands, Clinton Evans, Elliot Greenberg, Phil Gregory, Alan Scott, Simon Thibault, Michel Poirier, Rene Doyon, John Hutchings, Russ Alexander

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552040

KEYWORDS: Fabry–Perot interferometers, Coating, Tunable filters, James Webb Space Telescope, Ferroelectric materials, Prototyping, Actuators, Galactic astronomy, Reflectivity, Transmittance

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Proceedings Article | 12 October 2004 Paper

Paper

High-contrast imaging performance of the JWST fine guider sensor tunable filter coronagraph

Rene Doyon, David LaFreniere, Neil Rowlands, Clinton Evans, Richard Murowinski, John Hutchings, Russ Alexander

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551852

KEYWORDS: Coronagraphy, James Webb Space Telescope, Point spread functions, Speckle, Tunable filters, Wavefronts, Sensors, Exoplanets, Planets, Imaging spectroscopy

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Proceedings Article | 5 March 2003 Paper

Paper

NGST fine guidance sensor

Neil Rowlands, John Hutchings, Richard Murowinski, Russ Alexander

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461926

KEYWORDS: Sensors, Stars, Electronics, Control systems, Staring arrays, Point spread functions, Simulation of CCA and DLA aggregates, Space telescopes, Telescopes, Interfaces

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Proceedings Article | 17 February 2003 Paper

Paper

Imaging interferometer for satellite observations of wind and temperature on Mars, the Dynamics Atmosphere Mars Observer (DYNAMO)

William Ward, William Gault, Neil Rowlands, Shiguang Wang, Gordon Shepherd, Ian McDade, Jack McConnell, D Michelangeli, John Caldwell

Proceedings Volume 4833, (2003) https://doi.org/10.1117/12.473823

KEYWORDS: Mars, Space operations, Sensors, Mirrors, Interferometers, Doppler effect, Airglow, Wind measurement, Temperature metrology, Mirror pointing

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Proceedings Article | 12 December 2001 Paper

Paper

Waves Michelson Interferometer: a visible/near-IR interferometer for observing middle atmosphere dynamics and constituents

William Ward, William Gault, Gordon Shepherd, Neil Rowlands

Proceedings Volume 4540, (2001) https://doi.org/10.1117/12.450652

KEYWORDS: Mirrors, Sensors, Temperature metrology, Oxygen, Michelson interferometers, Interferometers, Thermosphere, Calibration, Space telescopes, Space operations

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Proceedings Article | 15 May 2001 Paper

Paper

Performance of short wave cutoff MBE HgCdTe 2D arrays: spaceborne application for sensing OH airglow wave structure

John Kumer, Richard Rairden, Gary Swenson, Neil Rowlands, William Gault, William Ward

Proceedings Volume 4306, (2001) https://doi.org/10.1117/12.426969

KEYWORDS: Airglow, Sensors, Mercury cadmium telluride, Multiplexers, Quantum efficiency, Optical filters, Cryogenics, Signal to noise ratio, Detector arrays, Space operations

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Proceedings Article | 21 February 2001 Paper

Paper

SWIFT instrument

Alan Scott, B. Mackay, Shiguang Wang, Neil Rowlands, G. Shepherd, W. Gault, Ian McDade, Yves Rochon

Proceedings Volume 4150, (2001) https://doi.org/10.1117/12.416988

KEYWORDS: Ozone, Atmospheric modeling, Wind measurement, Fabry–Perot interferometers, Satellites, Doppler effect, Optical filters, Sensors, Electronics, Stratosphere

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Proceedings Article | 6 December 1999 Paper

Paper

Narrowband etalon filters for stratospheric wind measurements

Reza Mani, Stephen Brown, William Gault, Stoyan Sargoytchev, Neil Rowlands, Pierre-Paul Proulx

Proceedings Volume 3759, (1999) https://doi.org/10.1117/12.372667

KEYWORDS: Fabry–Perot interferometers, Optical filters, Sensors, Germanium, Spectroscopy, Wind measurement, Temperature metrology, Satellites, Doppler effect, Nitrogen

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Proceedings Article | 13 November 1996 Paper

Paper

Calcite and dolomite discrimination using airborne SWIR imaging spectrometer data

Neil Rowlands, Robert Neville

Proceedings Volume 2819, (1996) https://doi.org/10.1117/12.258085

KEYWORDS: Absorption, Calcite, Reflectivity, Carbonates, Short wave infrared radiation, Minerals, Imaging systems, Spectral resolution, Data acquisition, Spectroscopy

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Proceedings Article | 13 November 1996 Paper

Paper

SFSI: the CCRS SWIR imaging spectrometer

Robert Neville, R. Marois, Neil Rowlands, Ian Powell

Proceedings Volume 2819, (1996) https://doi.org/10.1117/12.258084

KEYWORDS: Sensors, Signal to noise ratio, Short wave infrared radiation, Spectrographs, Spectroscopy, Calibration, Data acquisition, Minerals, Detector arrays, Spectral resolution

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Proceedings Article | 31 October 1996 Paper

Paper

Satellite instrument to measure stratospheric winds

Neil Rowlands, Gary Buttner, A. Raab, Gordon Shepherd, William Gault, Mark Cann, S. Dobbie, Stoyan Sargoytchev, William Ward, Reza Mani, Yves Rochon, David Tarasick

Proceedings Volume 2830, (1996) https://doi.org/10.1117/12.256103

KEYWORDS: Sensors, Data modeling, Visibility, Fabry–Perot interferometers, Satellites, Atmospheric modeling, Wind measurement, Interferometers, Optical filters, Signal to noise ratio

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Proceedings Article | 17 October 1994 Paper

Paper

Short-wave infrared (SWIR) imaging spectrometer for remote sensing

Neil Rowlands, Robert Neville, Ian Powell

Proceedings Volume 2269, (1994) https://doi.org/10.1117/12.188640

KEYWORDS: Sensors, Short wave infrared radiation, Calibration, Spectrographs, Spectroscopy, Detector arrays, Infrared spectroscopy, Cameras, Infrared technology, Quantum efficiency

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Showing 5 of 51 publications

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