Dr. Conrad Wells Profile

Dr. Conrad Wells

Optical Test Director

SPIE Involvement:

Author

Publications (25)

SPIE Journal Paper | 13 March 2020 Open Access

Use of close range photogrammetry in James Webb Space Telescope alignment testing under cryogenic conditions

Sharon Lunt, Conrad Wells, David Rhodes, Andrew DiAntonio

JATIS, Vol. 6, Issue 01, 018005, (March 2020) https://doi.org/10.1117/12.10.1117/1.JATIS.6.1.018005

KEYWORDS: James Webb Space Telescope, Cameras, Photogrammetry, Data modeling, Cryogenics, Imaging systems, Adaptive optics, Mirrors, Visibility, Telescopes

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Proceedings Article | 9 September 2019 Presentation

Ultrastable mirror assembly design (Conference Presentation)

Matthew East, Chris Sullivan, Conrad Wells

Proceedings Volume 11116, 111160Z (2019) https://doi.org/10.1117/12.2529575

KEYWORDS: Mirrors, Coronagraphy, Imaging systems, Optical design, Control systems design, Optical instrument design, Telescopes, Optical filters

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Proceedings Article | 9 September 2019 Presentation

Mirror segment sensitivity analysis and performance budgets for LUVOIR ULTRA (Conference Presentation)

Conrad Wells, Matthew East

Proceedings Volume 11116, 1111603 (2019) https://doi.org/10.1117/12.2529405

KEYWORDS: Segmented mirrors, Mirrors, Mirror mounts, Mirror stabilization

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Proceedings Article | 6 July 2018 Presentation + Paper

James Webb Space Telescope optical performance predictions post cryogenic vacuum tests

Paul Lightsey, J. Scott Knight, Allison Barto, Koby Smith, Taylor Chonis, Laura Coyle, Scott Acton, Scott Rohrbach, Kim Mehalick, Lee Feinberg, William Hayden, Charles Atkinson, Conrad Wells, James Hadaway

Proceedings Volume 10698, 1069804 (2018) https://doi.org/10.1117/12.2312276

KEYWORDS: Adaptive optics, Mirrors, James Webb Space Telescope, Cryogenics, Telescopes, Optical alignment, Space telescopes, Photogrammetry, Monte Carlo methods, Actuators

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Proceedings Article | 6 July 2018 Presentation + Paper

Performance of the center-of-curvature optical assembly during cryogenic testing of the James Webb Space Telescope

James Hadaway, Conrad Wells, Gene Olczak, Mark Waldman, Tony Whitman, Joseph Cosentino, Michael Zarella, Mark Connolly, David Chaney, Randal Telfer

Proceedings Volume 10698, 1069803 (2018) https://doi.org/10.1117/12.2315762

KEYWORDS: James Webb Space Telescope, Mirrors, Cryogenics, Adaptive optics, Tolerancing, Optical fabrication, Space telescopes, Interferometers, Cameras, Aerospace engineering

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Proceedings Article | 6 July 2018 Paper

Wavefront sensing and controls demo during the cryo-vac testing of JWST

D. Scott Acton, J. Knight, Taylor Chonis, Laura Coyle, Koby Smith, Eric Coppock, Charles-Philippe Lajoie, Marshall Perrin, Conrad Wells, James Hadaway

Proceedings Volume 10698, 106983P (2018) https://doi.org/10.1117/12.2315396

KEYWORDS: Image segmentation, James Webb Space Telescope, Space telescopes, Wavefronts, Telescopes, Wavefront sensors, Control systems, Mirrors, Image processing, Sensors

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Proceedings Article | 29 July 2016 Paper

Model predictions and observed performance of JWST's cryogenic position metrology system

Sharon Lunt, David Rhodes, Andrew DiAntonio, John Boland, Conrad Wells, Trevis Gigliotti, Gary Johanning

Proceedings Volume 9904, 99044C (2016) https://doi.org/10.1117/12.2231727

KEYWORDS: Photogrammetry, Cryogenics, James Webb Space Telescope, Imaging systems, Cameras, Metrology, Phase modulation, Adaptive optics, Data modeling, Image processing

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Proceedings Article | 29 July 2016 Paper

Characterization of the JWST Pathfinder mirror dynamics using the center of curvature optical assembly (CoCOA)

Conrad Wells, James Hadaway, Gene Olczak, Joseph Cosentino, John Johnston, Tony Whitman, Mark Connolly, David Chaney, J. Scott Knight, Randal Telfer

Proceedings Volume 9904, 990440 (2016) https://doi.org/10.1117/12.2234224

KEYWORDS: Mirrors, James Webb Space Telescope, Cryogenics, Interferometers, Space telescopes, Mirrors, James Webb Space Telescope, Cryogenics, Space telescopes, Image segmentation, Wavefronts, Optical fabrication, Aerospace engineering, Telescopes

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Proceedings Article | 29 July 2016 Paper

Alignment test results of the JWST Pathfinder Telescope mirrors in the cryogenic environment

Tony Whitman, Conrad Wells, James Hadaway, J. Scott Knight, Sharon Lunt

Proceedings Volume 9904, 990449 (2016) https://doi.org/10.1117/12.2233421

KEYWORDS: Mirrors, Space telescopes, James Webb Space Telescope, Telescopes, Cryogenics, Sensors, Interferometers, Cameras, Cryogenics, Adaptive optics, Phase modulation

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Proceedings Article | 29 July 2016 Paper

Performance of the primary mirror center-of-curvature optical metrology system during cryogenic testing of the JWST Pathfinder telescope

James Hadaway, Conrad Wells, Gene Olczak, Mark Waldman, Tony Whitman, Joseph Cosentino, Mark Connolly, David Chaney, Randal Telfer

Proceedings Volume 9904, 99044E (2016) https://doi.org/10.1117/12.2234741

KEYWORDS: James Webb Space Telescope, Space telescopes, Telescopes, Phase modulation, Cryogenics, Mirrors, Interferometers, Optical metrology, Optical fabrication, Optical alignment

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Proceedings Article | 31 August 2015 Paper

JWST pathfinder telescope risk reduction cryo test program

Gary Matthews, Thomas Scorse, John Spina, Darin Noël, Keith Havey, Jesse Huguet, Tony Whitman, Conrad Wells, Chanda Walker, Sharon Lunt, James Hadaway, Ritva Keski-Kuha, Lee Feinberg, Mark Voyton, Juli Lander, James Marsh

Proceedings Volume 9575, 957505 (2015) https://doi.org/10.1117/12.2188793

KEYWORDS: Mirrors, Telescopes, Space telescopes, James Webb Space Telescope, Optical fabrication, Optical testing, Photogrammetry, Optical isolators, Adaptive optics, Image analysis

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Proceedings Article | 21 September 2012 Paper

Measuring segmented primary mirror WFE in the presence of vibration and thermal drift on the light-weighted JWST

Tony Whitman, Kenneth Dziak, Conrad Wells, Gene Olczak

Proceedings Volume 8442, 84423J (2012) https://doi.org/10.1117/12.926530

KEYWORDS: James Webb Space Telescope, Mirrors, Interferometers, Telescopes, Optical isolators, Optical testing, Finite element methods, Phase modulation, Fourier transforms, Space telescopes

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Proceedings Article | 13 September 2012 Paper

Wavefront calibration testing of the James Webb Space Telescope primary mirror center of curvature optical assembly

Gene Olczak, Conrad Wells, David Fischer, Mark Connolly

Proceedings Volume 8450, 84500R (2012) https://doi.org/10.1117/12.927003

KEYWORDS: Computer generated holography, Phase modulation, Wavefronts, Calibration, Spatial frequencies, Monochromatic aberrations, James Webb Space Telescope, Aspheric lenses, Tunable lasers, Mirrors

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Proceedings Article | 15 September 2011 Paper

James Webb Space Telescope primary mirror integration: testing the multiwavelength interferometer on the test bed telescope

Gene Olczak, David Fischer, Mark Connelly, Conrad Wells

Proceedings Volume 8146, 814608 (2011) https://doi.org/10.1117/12.895446

KEYWORDS: James Webb Space Telescope, Mirrors, Space telescopes, Image segmentation, Liquid crystal lasers, Interferometers, Telescopes, Phase modulation, Wavefronts, Space mirrors

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Proceedings Article | 3 September 2010 Paper

Primary mirror segment assembly integration and alignment for the James Webb Space Telescope

Conrad Wells, Mark Mallette, David Fischer, Matthew Coon, John Amon, Les Kuipers, John Spina

Proceedings Volume 7793, 779309 (2010) https://doi.org/10.1117/12.861871

KEYWORDS: Interfaces, Mirrors, Liquids, James Webb Space Telescope, Adaptive optics, Calibration, System integration, Integrated optics, Phase modulation, Optical fabrication

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Proceedings Article | 3 August 2010 Paper

The center of curvature optical assembly for the JWST primary mirror cryogenic optical test: optical verification

Conrad Wells, Gene Olczak, Cormic Merle, Tom Dey, Mark Waldman, Tony Whitman, Eric Wick, Aaron Peer

Proceedings Volume 7790, 779003 (2010) https://doi.org/10.1117/12.861874

KEYWORDS: Mirrors, Calibration, Computer generated holography, Wavefronts, Interferometers, Spatial frequencies, James Webb Space Telescope, Optical fabrication, Aspheric lenses, Optical testing

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Proceedings Article | 19 July 2010 Paper

The center of curvature optical assembly for the JWST primary mirror cryogenic optical test

Conrad Wells, Gene Olczak, Cormic Merle, Tom Dey, Mark Waldman, Tony Whitman, Eric Wick, Aaron Peer

Proceedings Volume 7739, 77390L (2010) https://doi.org/10.1117/12.858617

KEYWORDS: Interferometers, Mirrors, Phase modulation, James Webb Space Telescope, Cryogenics, Optical fabrication, Calibration, Wavefronts, Optical testing, Interferometry

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Proceedings Article | 22 August 2009 Paper

Optomechanical integration and alignment verification of the James Webb Space Telescope (JWST) optical telescope element

Conrad Wells, Matthew Coon

Proceedings Volume 7433, 743303 (2009) https://doi.org/10.1117/12.826339

KEYWORDS: Adaptive optics, Mirrors, James Webb Space Telescope, Interfaces, Shape memory alloys, Optical components, Integrated optics, System integration, Optical alignment, Optical telescopes

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Proceedings Article | 22 June 2006 Paper

Optical verification of the James Webb Space Telescope

Brian McComas, Rich Rifelli, Allison Barto, Adam Contos, Tony Whitman, Conrad Wells, John Hagopian

Proceedings Volume 6271, 62710A (2006) https://doi.org/10.1117/12.672448

KEYWORDS: Observatories, James Webb Space Telescope, Image quality, Mirrors, Cryogenics, Space telescopes, Data modeling, Telescopes, Optical components, Optical testing

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Proceedings Article | 12 October 2004 Paper

Assembly integration and ambient testing of the James Webb Space Telescope primary mirror

Conrad Wells, Tony Whitman, John Hannon, Art Jensen

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551898

KEYWORDS: Mirrors, Interferometers, Phase modulation, James Webb Space Telescope, Laser scanners, Actuators, Scanners, Interfaces, Cryogenics, Optical fabrication

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Proceedings Article | 1 November 1997 Paper

Fringe modulation characterization for a phase-shifting imaging ellipsometer

Conrad Wells, James Wyant

Proceedings Volume 3134, (1997) https://doi.org/10.1117/12.295148

KEYWORDS: Modulation, Phase shift keying, Polarization, Phase measurement, Phase shifts, Beam splitters, Visibility, Interferometers, Calibration, Phase interferometry

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