Dr. Fang Shi Profile

Dr. Fang Shi

Sr. Engineer at Jet Propulsion Lab

SPIE Involvement:

Author

Area of Expertise:

Wavefront sensing and control , Segmented mirror phasing , Imaging optical system design , Adaptive optics , Optical system modeling

Publications (75)

Proceedings Article | 27 August 2022 Presentation + Paper

Presentation + Paper

Roman coronagraph instrument: engineering overview and status

Ilya Poberezhskiy, Kathryn Heydorff, Thomas Luchik, Feng Zhao, Eric Cady, Gasia Bedrosian, Mark Colavita, Brandon Creager, Renaud Goullioud, Tyler Groff, Amanda Grue, Brian Monacelli, Patrick Morrissey, Joshua Kempenaar, Brian Kern, Matthew King, Timothy Koch, John Krist, Gary Kuan, Jonathan Lam, Dorothy Lewis, Fai Mok, David Muliere, Bijan Nemati, Charley Noecker, Jeffrey Oseas, A.J. Riggs, Fang Shi, Belinda Shreckengost

Proceedings Volume 12180, 121801X (2022) https://doi.org/10.1117/12.2630540

KEYWORDS: Coronagraphy, Electronics, Cameras, Interfaces, Mirrors, Control systems, Optical alignment, Observatories, Space operations, Optical benches

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Proceedings Article | 27 August 2022 Presentation + Paper

Presentation + Paper

The Roman Space Telescope coronagraph technology demonstration: current status and relevance to future missions

B. Mennesson, V. Bailey, R. Zellem, S. Hildebrandt, M. Ygouf, J. Rhodes, N. Zimmerman, B. Nemati, G. Gonzalez, E. Cady, B. Kern, T. Koch, J. Krist, K. Heydorff, T. Luchik, F. Mok, P. Morrissey, I. Poberezhskiy, A. Riggs, F. Shi, F. Zhao, R. Akeson, L. Armus, A. Greenbaum, J. Ingalls, P. Lowrance

Proceedings Volume 12180, 121801W (2022) https://doi.org/10.1117/12.2629176

KEYWORDS: Coronagraphy, Wavefront sensors, Electron multiplying charge coupled devices, Imaging spectroscopy, Wavefronts, Stars, Spectroscopy, Performance modeling, Cameras, Observatories

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Proceedings Article | 1 September 2021 Presentation + Paper

Presentation + Paper

The Roman Space Telescope coronagraph technology demonstration: current status and relevance to future missions

B. Mennesson, V. P. Bailey, R. Zellem, N. Zimmerman, M. Ygouf, S. Hildebrandt, J. Rhodes, J. Kasdin, B. Macintosh, M. Turnbull, E. Douglas, A. Mandell, B. Nemati, G. Gonzalez, E. Cady, B. Kern, J. Krist, F. Shi, F. Mok, P. Morrissey, K. Heydorff, I. Pobereszhskiy, F. Zhao, T. Luchik, E. Maier, R. Akeson, L. Armus, J. Ingalls, P. Lowrance, T. Meshkat

Proceedings Volume 11823, 1182310 (2021) https://doi.org/10.1117/12.2603343

KEYWORDS: Coronagraphy, Electron multiplying charge coupled devices, Wavefront sensors, Cameras, Wavefronts, Imaging spectroscopy, Stars, Imaging systems, Spectroscopy, Polarimetry

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Proceedings Article | 12 January 2021 Presentation + Paper

Presentation + Paper

Roman space telescope coronagraph: engineering design and operating concept

Ilya Poberezhskiy, Thomas Luchik, Feng Zhao, Margaret Frerking, Scott Basinger, Eric Cady, M. Mark Colavita, Brandon Creager, Nanaz Fathpour, Renaud Goullioud, Tyler Groff, Patrick Morrissey, Joshua Kempenaar, Brian Kern, Timothy Koch, John Krist, Fai Mok, David Muliere, Bijan Nemati, A.J. Riggs, Byoung-Joon Seo, Fang Shi, Belinda Shreckengost, John Steeves, Hong Tang

Proceedings Volume 11443, 114431V (2021) https://doi.org/10.1117/12.2563480

KEYWORDS: Infrared telescopes, James Webb Space Telescope, Telescopes, Coronagraphy, Infrared radiation, Instrumentation engineering, Optical instrument design, Wavefronts, Imaging spectroscopy, Infrared imaging

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Proceedings Article | 7 January 2021 Poster + Paper

Poster + Paper

Roman Space Telescope CGI: prism and polarizer characterization modes

Tyler Groff, Neil Zimmerman, Hari Subedi, Maxime Rizzo, John Titus, Jim Lyons, Dylan Bell, Samuel Gaylin, Guangjun Gao, Bert Pasquale, Nicholas Nicolaeff, Motohide Tamura, Fang Shi

Proceedings Volume 11443, 114433D (2021) https://doi.org/10.1117/12.2562925

KEYWORDS: Prisms, Polarizers, Polarization, Spectral calibration, Spectroscopes, Planets, Spectral resolution, Optical design, Calibration, Coronagraphy

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Prediction and evaluation of the image of the WFIRST coronagraph pupil at the shaped-pupil mask

David Marx, Brian Kern, John Krist, Bala Balasubramanian, A. J. Eldorado Riggs, Byoung-Joon Seo, Eric Cady, Hong Tang, Camilo Prada, Garreth Ruane, Fang Shi, Charley Noecker, Blake Crowther

Proceedings Volume 11443, 1144339 (2020) https://doi.org/10.1117/12.2562629

KEYWORDS: Coronagraphy, Image analysis, Telescopes, Optical instrument design, Optimization (mathematics), Wavefronts, Deformable mirrors, Modulation, Tolerancing, Performance modeling

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Proceedings Article | 16 September 2019 Presentation + Paper

Presentation + Paper

The WFIRST coronagraph instrument phase B optical design

Hong Tang, Michael Rodgers, Brandon Creager, John Krist, James McGuire, Keith Patterson, Mayer Rud, Fang Shi, Feng Zhao

Proceedings Volume 11117, 111170C (2019) https://doi.org/10.1117/12.2530506

KEYWORDS: Coronagraphy, Optical design, Mirrors, Deformable mirrors, Exoplanets, Stars, Astronomical imaging, Optical fabrication, Optical alignment, Polarization

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Proceedings Article | 16 September 2019 Presentation + Paper

Presentation + Paper

Design description and commissioning performance of a stable coronagraph technology development testbed for direct imaging of Earth-like exoplanets

Keith Patterson, Byoung-Joon Seo, Kunjithapatham Balasubramanian, Talso Chui, Brendan Crill, John Gill, Brian Kern, Ray Lam, David Marx, Dwight Moody, Camilo Mejia Prada, Garreth Ruane, Jordan Rupp, John Shaw, Fang Shi, Nicholas Siegler, Hong Tang, John Trauger, Victor White, Daniel Wilson, Karl Yee, Robert Zimmer

Proceedings Volume 11117, 111171U (2019) https://doi.org/10.1117/12.2530401

KEYWORDS: Exoplanets, Coronagraphy, Deformable mirrors, Visible radiation, Turbulence, Convection, Composites, Vibration isolation, Electronics, Wavefront sensors

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Proceedings Article | 16 September 2019 Presentation + Paper

Presentation + Paper

Testbed demonstration of high-contrast coronagraph imaging in search for Earth-like exoplanets

Byoung-Joon Seo, Keith Patterson, Kunjithapatham Balasubramanian, Brendan Crill, Talso Chui, Daniel Echeverri, Brian Kern, David Marx, Dwight Moody, Camilo Mejia Prada, Garreth Ruane, Fang Shi, John Shaw, Nick Siegler, Hong Tang, John Trauger, Daniel Wilson, Robert Zimmer

Proceedings Volume 11117, 111171V (2019) https://doi.org/10.1117/12.2530033

KEYWORDS: Coronagraphy, Exoplanets, Space telescopes, James Webb Space Telescope, Infrared telescopes, Visible radiation, Aerospace engineering, Space operations, Telescopes, Near infrared

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Proceedings Article | 16 September 2019 Presentation + Paper

Presentation + Paper

WFIRST low order wavefront sensing and control (LOWFS/C) performance on line-of-sight disturbances from multiple reaction wheels

Fang Shi, Joel Shields, Tuan Truong, Byoung-Joon Seo, Felipe Fregoso, Brian Kern, David Marx, Keith Patterson, Camilo Mejia Prada, John Shaw, Chris Shelton

Proceedings Volume 11117, 111170I (2019) https://doi.org/10.1117/12.2530486

KEYWORDS: Coronagraphy, Wavefront sensors, Wavefronts, Observatories, Wavefront distortions, Telescopes, Device simulation, Hardware testing

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Proceedings Article | 11 September 2019 Presentation + Paper

Presentation + Paper

High-contrast imaging stability using MEMS deformable mirror

Camilo Mejia Prada, Eugene Serabyn, Fang Shi

Proceedings Volume 11117, 1111709 (2019) https://doi.org/10.1117/12.2525628

KEYWORDS: Deformable mirrors, Microelectromechanical systems, Coronagraphy, Imaging systems, Wavefronts, Stars, Exoplanets, Speckle, Optical aberrations, Space mirrors

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Proceedings Article | 22 August 2018 Presentation + Paper

Presentation + Paper

Hybrid lyot coronagraph for WFIRST: high contrast testbed demonstration in flight-like low flux environment

Byoung-Joon Seo, Fang Shi, Bala Balasubramanian, Eric Cady, Brian Gordon, Brian Kern, Raymond Lam, David Marx, Dwight Moody, Richard Muller, Keith Patterson, Ilya Poberezhskiy, Camilo Mejia Prada, A.J. Eldorado Riggs, John Trauger, Daniel Wilson

Proceedings Volume 10698, 106982P (2018) https://doi.org/10.1117/12.2314358

KEYWORDS: Coronagraphy, Telescopes, Wavefronts, Space telescopes, Low light level imaging

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Proceedings Article | 30 July 2018 Presentation + Paper

Presentation + Paper

WFIRST low order wavefront sensing and control dynamic testbed performance under the flight like photon flux

Fang Shi, Byoung-Joon Seo, Eric Cady, Brian Kern, Raymond Lam, David Marx, Keith Patterson, Camilo Mejia Prada, John Shaw, Chris Shelton, Joel Shields, Hong Tang, Tuan Truong

Proceedings Volume 10698, 106982O (2018) https://doi.org/10.1117/12.2312746

KEYWORDS: Sensors, Coronagraphy, Wavefronts, Cameras, Stars, Wavefront sensors, Line of sight stabilization, Mirrors, Telescopes, Actuators

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To maintain the required performance for the WFIRST Coronagraph Instrument (CGI) in a realistic space environment, a Low Order Wavefront Sensing and Control (LOWFS/C) subsystem is necessary. The WFIRST CGI LOWFS/C subsystem will use the Zernike wavefront sensor, which has a phase-shifting disk combined with the coronagraph’s focal plane mask, to sense the low-order wavefront drift and line-of-sight (LoS) error using the rejected starlight. The dynamic tests on JPL’s Occulting Mask Coronagraph (OMC) Testbed have demonstrated that LOWFS/C can maintain coronagraph contrast to better than 10^-8 in presence of WFIRST-like line of sight and low order wavefront disturbances in both Shaped Pupil Coronagraph (SPC) and Hybrid Lyot Coronagraph (HLC) modes. However, the previous dynamic tests have been done using a bright source with photon flux equivalent to stellar magnitude of MV = -3.5. The LOWFS/C technology development on the OMC testbed has since then concentrated in evaluating and improving the LOWFS/C performance under the realistic photon flux that is equivalent to WFIRST Coronagraph target stars. Our recent testbed tests have demonstrated that the LOWFS/C can work cohesively with the stellar light suppression wavefront control, which brings broad band coronagraph contrast from ~1x10^-6 to 6x10^-9, while LOWF/C is simultaneously suppressing the WFIRST like LoS and low order wavefront drift disturbances on a source that photon flux is equivalent to a MV = 2 star. This lab demonstration mimics the CGI initial dark hole establish process on a bright reference star. We have also demonstrated on the testbed that LOWFS/C can maintain the coronagraph contrast by suppressing the WFIRST like line-of-sight disturbances on a fainter MV = 5 star. This mimics scenario of CGI science target observations. In this paper we will present the recent dynamic testbed performance results of LOWFS/C LoS loops and low order wavefront error correction loop on the flight like photon flux.

Proceedings Article | 16 July 2018 Presentation + Paper

Presentation + Paper

Shaped pupil coronagraph: disk science mask experimental verification and testing

David Marx, Eric Cady, A. J. Eldorado Riggs, Camilo Prada, Brian Kern, Byoung-Joon Seo, Fang Shi

Proceedings Volume 10698, 106981E (2018) https://doi.org/10.1117/12.2312602

KEYWORDS: Coronagraphy, Spatial frequencies, Speckle, Performance modeling, Wavefronts, Fourier transforms, Mirrors, Deformable mirrors

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Proceedings Article | 12 September 2017 Presentation + Paper

Presentation + Paper

Fabrication of coronagraph masks and laboratory scale star-shade masks: characteristics, defects, and performance

Kunjithapatham Balasubramanian, A. J. Eldorado Riggs, Eric Cady, Victor White, Karl Yee, Daniel Wilson, Pierre Echternach, Richard Muller, Camilo Mejia Prada, Byoung-Joon Seo, Fang Shi, Daniel Ryan, Santos Fregoso, Jacob Metzman, Robert Casey Wilson

Proceedings Volume 10400, 104000C (2017) https://doi.org/10.1117/12.2274059

KEYWORDS: Photomasks, Exoplanets, Electron beam lithography, Silicon, Stars, Reflectivity, Wavefronts, Performance modeling, Polarimetry

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Proceedings Article | 1 September 2017 Presentation + Paper

Presentation + Paper

Hybrid Lyot coronagraph for WFIRST: high-contrast broadband testbed demonstration

Byoung-Joon Seo, Eric Cady, Brian Gordon, Brian Kern, Raymond Lam, David Marx, Dwight Moody, Richard Muller, Keith Patterson, Ilya Poberezhskiy, Camilo Mejia Prada, Erkin Sidick, Fang Shi, John Trauger, Daniel Wilson

Proceedings Volume 10400, 104000F (2017) https://doi.org/10.1117/12.2274687

KEYWORDS: Wavefronts, Infrared telescopes, Wavefront sensors, Infrared radiation, Space telescopes, Telescopes, Exoplanets, Metals, Dielectrics, Deformable mirrors

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Proceedings Article | 1 September 2017 Presentation + Paper

Presentation + Paper

Dynamic testbed demonstration of WFIRST coronagraph low order wavefront sensing and control (LOWFS/C)

Fang Shi, Eric Cady, Byoung-Joon Seo, Xin An, Kunjithapatham Balasubramanian, Brian Kern, Raymond Lam, David Marx, Dwight Moody, Camilo Mejia Prada, Keith Patterson, Ilya Poberezhskiy, Joel Shields, Erkin Sidick, Hong Tang, John Trauger, Tuan Truong, Victor White, Daniel Wilson, Hanying Zhou

Proceedings Volume 10400, 104000D (2017) https://doi.org/10.1117/12.2274887

KEYWORDS: Wavefront sensors, Wavefronts, Mirrors, Deformable mirrors, Environmental sensing, Phase shifting, Optical telescopes, Optical fabrication, Device simulation, Space telescopes

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Proceedings Article | 1 September 2017 Paper

Paper

Shaped pupil coronagraphy for WFIRST: high-contrast broadband testbed demonstration

Eric Cady, Kunjithapatham Balasubramanian, Jessica Gersh-Range, Jeremy Kasdin, Brian Kern, Raymond Lam, Camilo Mejia Prada, Dwight Moody, Keith Patterson, Ilya Poberezhskiy, A. J. Eldorado Riggs, Byoung-Joon Seo, Fang Shi, Hong Tang, John Trauger, Hanying Zhou, Neil Zimmerman

Proceedings Volume 10400, 104000E (2017) https://doi.org/10.1117/12.2272834

KEYWORDS: Wavefronts, Coronagraphy, Exoplanets, Wavefront sensors, Performance modeling, Systems modeling, Control systems

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Proceedings Article | 29 July 2016 Paper

Paper

Low order wavefront sensing and control for WFIRST coronagraph

Fang Shi, Kunjithapatham Balasubramanian, Randall Bartos, Randall Hein, Raymond Lam, Milan Mandic, Douglas Moore, James Moore, Keith Patterson, Ilya Poberezhskiy, Joel Shields, Erkin Sidick, Hong Tang, Tuan Truong, James Wallace, Xu Wang, Daniel Wilson

Proceedings Volume 9904, 990418 (2016) https://doi.org/10.1117/12.2234226

KEYWORDS: Wavefront sensors, Space telescopes, Wavefronts, Mirrors, Telescopes, Coronagraphy, Sensors, Cameras, Monochromatic aberrations, Device simulation

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Proceedings Article | 29 July 2016 Paper

Paper

Zernike wavefront sensor (ZWFS) development for Low Order Wavefront Sensing (LOWFS)

Xu Wang, Fang Shi, J. Kent Wallace

Proceedings Volume 9904, 990463 (2016) https://doi.org/10.1117/12.2231252

KEYWORDS: Wavefront sensors, Stars, Coronagraphy, Sensors, Phase shift keying, Wavefronts, Mirrors, Image sensors, Performance modeling, Data modeling

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SPIE Journal Paper | 15 March 2016

Low-order wavefront sensing and control for WFIRST-AFTA coronagraph

Fang Shi, Kunjithapatham Balasubramanian, Randall Hein, Raymond Lam, Douglas Moore, James Moore, Keith Patterson, Ilya Poberezhskiy, Joel Shields, Erkin Sidick, Hong Tang, Tuan Truong, J. Kent Wallace, Xu Wang, Daniel Wilson

JATIS, Vol. 2, Issue 01, 011021, (March 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.1.011021

KEYWORDS: Coronagraphy, Wavefront sensors, Wavefronts, Sensors, Telescopes, Actuators, Space telescopes, Control systems, Cameras, Mirrors

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Proceedings Article | 16 September 2015 Paper

Paper

Control design for momentum-compensated fast steering mirror for WFIRST-AFTA coronagraph instrument

Keith Patterson, Joel Shields, Xu Wang, Hong Tang, Ali Azizi, Paul Brugarolas, Milan Mandic, Fang Shi

Proceedings Volume 9605, 96052C (2015) https://doi.org/10.1117/12.2191813

KEYWORDS: Coronagraphy, Sensors, Mirrors, Telescopes, Space telescopes, Device simulation, Wavefronts, Stars, Control systems, Ferroelectric materials

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Proceedings Article | 16 September 2015 Paper

Paper

Zernike wavefront sensor modeling development for LOWFS on WFIRST-AFTA

Xu Wang, J. Kent Wallace, Fang Shi

Proceedings Volume 9605, 960528 (2015) https://doi.org/10.1117/12.2186191

KEYWORDS: Stars, Coronagraphy, Sensors, Wavefront sensors, Wavefronts, Sensor performance, Cameras, Quantum efficiency, Space telescopes, Point spread functions

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Proceedings Article | 16 September 2015 Paper

Paper

Effect of DM actuator errors on the WFIRST/AFTA coronagraph contrast performance

Erkin Sidick, Fang Shi

Proceedings Volume 9605, 960506 (2015) https://doi.org/10.1117/12.2188240

KEYWORDS: Actuators, Coronagraphy, Wavefronts, Calibration, Space telescopes, Telescopes, Contrast sensitivity, Exoplanets, Wavefront sensors, Sensors

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Proceedings Article | 16 September 2015 Paper

Paper

Low order wavefront sensing and control for WFIRST-AFTA coronagraph

Fang Shi, Kunjithapatham Balasubramanian, Randall Bartos, Randall Hein, Brian Kern, John Krist, Raymond Lam, Douglas Moore, James Moore, Keith Patterson, Ilya Poberezhskiy, Joel Shields, Erkin Sidick, Hong Tang, Tuan Truong, Kent Wallace, Xu Wang, Dan Wilson

Proceedings Volume 9605, 960509 (2015) https://doi.org/10.1117/12.2188775

KEYWORDS: Coronagraphy, Wavefronts, Wavefront sensors, Actuators, Telescopes, Calibration, Sensors, Mirrors, Monochromatic aberrations, Space telescopes

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Proceedings Article | 16 September 2015 Paper

Paper

The WFIRST/AFTA coronagraph instrument optical design

Hong Tang, Mayer Rud, Richard Demers, Renaud Goullioud, John Krist, Fang Shi, Feng Zhao

Proceedings Volume 9605, 960504 (2015) https://doi.org/10.1117/12.2188446

KEYWORDS: Coronagraphy, Telescopes, Iterated function systems, Mirrors, Infrared telescopes, Polarization, Optical design, Collimators, Cameras, Stars

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Proceedings Article | 2 August 2014 Paper

Paper

Technology development towards WFIRST-AFTA coronagraph

Ilya Poberezhskiy, Feng Zhao, Xin An, Kunjithapatham Balasubramanian, Ruslan Belikov, Eric Cady, Richard Demers, Rosemary Diaz, Qian Gong, Brian Gordon, Renaud Goullioud, Frank Greer, Olivier Guyon, Michael Hoenk, N. Jeremy Kasdin, Brian Kern, John Krist, Andreas Kuhnert, Michael McElwain, Bertrand Mennesson, Dwight Moody, Richard Muller, Bijan Nemati, Keith Patterson, A. J. Riggs, Daniel Ryan, Byoung-Joon Seo, Stuart Shaklan, Erkin Sidick, Fang Shi, Nicholas Siegler, Rémi Soummer, Hong Tang, John Trauger, J. Kent Wallace, Xu Wang, Victor White, Daniel Wilson, Karl Yee, Hanying Zhou, Neil Zimmerman

Proceedings Volume 9143, 91430P (2014) https://doi.org/10.1117/12.2060320

KEYWORDS: Coronagraphy, Sensors, Wavefronts, Wavefront sensors, Iterated function systems, Photomasks, Space telescopes, Exoplanets, Deformable mirrors, Planets

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Proceedings Article | 18 July 2014 Paper

Paper

Experimental validation of Advanced Dispersed Fringe Sensing (ADFS) algorithm using Advanced Wavefront Sensing and Correction Testbed (AWCT)

Xu Wang, Fang Shi, Norbert Sigrist, Byoung-Joon Seo, Hong Tang, Siddarayappa Bikkannavar, Scott Basinger, Oliver Lay

Proceedings Volume 9151, 91513N (2014) https://doi.org/10.1117/12.2056554

KEYWORDS: Free electron lasers, Calibration, Point spread functions, Algorithm development, Image segmentation, Signal processing, Wavefront sensors, Ferroelectric materials, Data analysis, Image processing

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Proceedings Article | 10 August 2010 Paper

Paper

Advanced DFS: a dispersed fringe sensing algorithm insensitive to small calibration errors

Joshua Spechler, Daniel Hoppe, Norbert Sigrist, Fang Shi, Byoung-Joon Seo, Siddarayappa Bikkannavar

Proceedings Volume 7731, 773155 (2010) https://doi.org/10.1117/12.856510

KEYWORDS: Calibration, Sensors, Monte Carlo methods, James Webb Space Telescope, Signal detection, Error analysis, Detection and tracking algorithms, Space telescopes, Wavefronts, Telescopes

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Proceedings Article | 23 July 2010 Paper

Paper

Phase retrieval methods for wavefront sensing

Siddarayappa Bikkannavar, David Redding, Joseph Green, Scott Basinger, David Cohen, John Lou, Catherine Ohara, Fang Shi

Proceedings Volume 7739, 77392X (2010) https://doi.org/10.1117/12.858980

KEYWORDS: Point spread functions, Phase retrieval, Magnesium, Wavefront sensors, Error analysis, Space telescopes, Spatial frequencies, Image processing, Wavefronts, High dynamic range imaging

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Proceedings Article | 23 July 2010 Paper

Paper

Advanced wavefront sensing and control testbed (AWCT)

Fang Shi, Scott Basinger, Rosemary Diaz, Robert Gappinger, Hong Tang, Raymond Lam, Erkin Sidick, Randall Hein, Mayer Rud, Mitchell Troy

Proceedings Volume 7739, 77392W (2010) https://doi.org/10.1117/12.858304

KEYWORDS: Wavefronts, Cameras, Wavefront sensors, Mirrors, Interferometers, Optical testing, Phase retrieval, Optical alignment, Light, Sensors

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Proceedings Article | 12 July 2008 Paper

Paper

NIRCam Long Wavelength Channel grisms as the Dispersed Fringe Sensor for JWST segment mirror coarse phasing

Fang Shi, Brian King, Norbert Sigrist, Scott Basinger

Proceedings Volume 7010, 70102E (2008) https://doi.org/10.1117/12.789641

KEYWORDS: Image segmentation, James Webb Space Telescope, Sensors, Mirrors, Point spread functions, Image processing algorithms and systems, Image processing, Modulation, Calibration, Telescopes

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Proceedings Article | 20 September 2007 Paper

Paper

End-to-end commissioning demonstration of the James Webb Space Telescope

D. Scott Acton, Timothy Towell, John Schwenker, Duncan Shields, Erin Sabatke, Adam Contos, Karl Hansen, Fang Shi, Bruce Dean, Scott Smith

Proceedings Volume 6687, 668706 (2007) https://doi.org/10.1117/12.731653

KEYWORDS: Image segmentation, James Webb Space Telescope, Image processing, Phase modulation, Space telescopes, Wavefronts, Telescopes, Mirrors, Aerospace engineering, Imaging arrays

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Proceedings Article | 20 September 2007 Paper

Paper

TRL-6 for JWST wavefront sensing and control

Lee Feinberg, Bruce Dean, David Aronstein, Charles Bowers, William Hayden, Richard Lyon, Ron Shiri, J. Scott Smith, D. Scott Acton, Larkin Carey, Adam Contos, Erin Sabatke, John Schwenker, Duncan Shields, Tim Towell, Fang Shi, Luis Meza

Proceedings Volume 6687, 668708 (2007) https://doi.org/10.1117/12.736059

KEYWORDS: Image segmentation, James Webb Space Telescope, Wavefronts, Phase retrieval, Mirrors, Telescopes, Wavefront sensors, Sensors, Cameras, Phase modulation

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Proceedings Article | 19 September 2007 Paper

Paper

Observing exoplanets with the JWST NIRCam grisms

Thomas Greene, Charles Beichman, Daniel Eisenstein, Scott Horner, Douglas Kelly, Yalan Mao, Michael Meyer, Marcia Rieke, Fang Shi

Proceedings Volume 6693, 66930G (2007) https://doi.org/10.1117/12.732506

KEYWORDS: Stars, James Webb Space Telescope, Exoplanets, Sensors, Signal to noise ratio, Planets, Spectroscopy, Optical filters, Jupiter, Spatial resolution

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Proceedings Article | 19 September 2007 Paper

Paper

Hunting planets and observing disks with the JWST NIRCam coronagraph

John Krist, Charles Beichman, John Trauger, Marcia Rieke, Steve Somerstein, Joseph Green, Scott Horner, John Stansberry, Fang Shi, Michael Meyer, Karl Stapelfeldt, Thomas Roellig

Proceedings Volume 6693, 66930H (2007) https://doi.org/10.1117/12.734873

KEYWORDS: Coronagraphy, Stars, Planets, James Webb Space Telescope, Point spread functions, Wavefronts, Telescopes, Space telescopes, Sensors, Diffraction

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Proceedings Article | 19 September 2007 Paper

Paper

Laboratory demonstrations of high-contrast imaging for space coronagraphy

John Trauger, Amir Give'on, Brian Gordon, Brian Kern, Andreas Kuhnert, Dwight Moody, Albert Niessner, Fang Shi, Daniel Wilson, Chris Burrows

Proceedings Volume 6693, 66930X (2007) https://doi.org/10.1117/12.735004

KEYWORDS: Coronagraphy, Stars, Wavefronts, Deformable mirrors, Speckle, Actuators, Mirrors, Signal attenuation, Space telescopes, Imaging systems

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Proceedings Article | 7 July 2006 Paper

Paper

Performance of TPF's high-contrast imaging testbed: modeling and simulations

Erkin Sidick, Fang Shi, Scott Basinger, Dwight Moody, Andrew Lowman, Andreas Kuhnert, John Tauger

Proceedings Volume 6265, 62653L (2006) https://doi.org/10.1117/12.670524

KEYWORDS: Coronagraphy, Light sources, Photomasks, Algorithm development, Wavefronts, Modeling and simulation, Near field optics, Phase measurement, Data modeling, Optical components

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Proceedings Article | 6 July 2006 Paper

Paper

Demonstration of the James Webb Space Telescope commissioning on the JWST testbed telescope

D. Scott Acton, Timothy Towell, John Schwenker, John Swensen, Duncan Shields, Erin Sabatke, Lana Klingemann, Adam Contos, Brian Bauer, Karl Hansen, Paul Atcheson, David Redding, Fang Shi, Scott Basinger, Bruce Dean, Laura Burns

Proceedings Volume 6265, 62650R (2006) https://doi.org/10.1117/12.672133

KEYWORDS: Image segmentation, James Webb Space Telescope, Space telescopes, Phase modulation, Telescopes, Wavefronts, Algorithm development, Image processing algorithms and systems, Sensors, Aerospace engineering

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Proceedings Article | 5 July 2006 Paper

Paper

Toward 10¹⁰ contrast for terrestrial exoplanet detection: demonstration of wavefront correction in a shaped-pupil coronagraph

Ruslan Belikov, Amir Give'on, John Trauger, Michael Carr, N. Kasdin, Robert Vanderbei, Fang Shi, Kunjithapatham Balasubramanian, Andreas Kuhnert

Proceedings Volume 6265, 626518 (2006) https://doi.org/10.1117/12.672511

KEYWORDS: Speckle, Coronagraphy, Wavefronts, Point spread functions, Cameras, Manufacturing, Imaging systems, Planets, Polarization, Charge-coupled devices

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Proceedings Article | 10 June 2006 Paper

Paper

Performance of dispersed fringe sensor in the presence of segmented mirror aberrations: modeling and simulation

Fang Shi, Scott Basinger, David Redding

Proceedings Volume 6265, 62650Y (2006) https://doi.org/10.1117/12.672714

KEYWORDS: Wavefront aberrations, James Webb Space Telescope, Wavefronts, Point spread functions, Visibility, Image segmentation, Performance modeling, Sensors, Mirrors, Segmented mirrors

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Proceedings Article | 10 June 2006 Paper

Paper

Verification of the James Webb Space Telescope coarse phase sensor using the Keck Telescope

Marc Albanese, Allan Wirth, Andrew Jankevics, Tom Gonsiorowski, Catherine Ohara, Fang Shi, Mitchell Troy, Gary Chanan, Scott Acton

Proceedings Volume 6265, 62650Z (2006) https://doi.org/10.1117/12.672055

KEYWORDS: James Webb Space Telescope, Mirrors, Calibration, Image segmentation, Sensors, Space telescopes, Telescopes, Image processing algorithms and systems, Image registration, Cameras

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Proceedings Article | 5 October 2005 Paper

Paper

Wavefront amplitude variation of TPF's high-contrast imaging testbed: modeling and experiment

Fang Shi, Andrew Lowman, Dwight Moody, Albert Niessner, John Trauger

Proceedings Volume 5905, 59051L (2005) https://doi.org/10.1117/12.618574

KEYWORDS: Mirrors, Wavefronts, Cameras, Near field optics, Imaging systems, Stars, Optical testing, Semiconductor lasers, Planets, Wavefront sensors

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Proceedings Article | 12 October 2004 Paper

Paper

Wavefront control testbed experimental results

Laura Burns, Scott Basinger, Scott Campion, Jessica Faust, Lee Feinberg, Joseph Green, William Hayden, Andrew Lowman, Catherine Ohara, Peter Petrone, David Redding, Fang Shi, David Van Buren, Barbara Zukowski

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551794

KEYWORDS: Image segmentation, Wavefronts, Mirrors, James Webb Space Telescope, Space telescopes, Visibility, Telescopes, Wavefront sensors, Phase retrieval, Device simulation

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Proceedings Article | 12 October 2004 Paper

Paper

James Webb Space Telescope wavefront sensing and control algorithms

Daniel Acton, Paul Atcheson, Mick Cermak, Lana Kingsbury, Fang Shi, David Redding

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551846

KEYWORDS: Image segmentation, James Webb Space Telescope, Wavefronts, Telescopes, Phase modulation, Mirrors, Space telescopes, Algorithm development, Wavefront sensors, Image processing

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Proceedings Article | 12 October 2004 Paper

Paper

Coronagraph contrast demonstrations with the high-contrast imaging testbed

John Trauger, Chris Burrows, Brian Gordon, Joseph Green, Andrew Lowman, Dwight Moody, Albert Niessner, Fang Shi, Daniel Wilson

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552520

KEYWORDS: Coronagraphy, Space telescopes, Wavefronts, Photomasks, Mirrors, Stars, Telescopes, Deformable mirrors, Algorithm development, Wavefront sensors

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Proceedings Article | 12 October 2004 Paper

Paper

Phase Retrieval Camera optical testing of the Advanced Mirror System Demonstrator (AMSD)

Catherine Ohara, Jessica Faust, Andrew Lowman, Joseph Green, David Redding, Scott Basinger, David Cohen, Fang Shi

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551793

KEYWORDS: Mirrors, James Webb Space Telescope, Magnesium, Wavefront sensors, Phase retrieval, Wavefronts, Iris, Point spread functions, Cameras, Optical testing

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Proceedings Article | 12 October 2004 Paper

Paper

High-contrast imaging testbed for the Terrestrial Planet Finder coronagraph

Andrew Lowman, John Trauger, Brian Gordon, Joseph Green, Dwight Moody, Albert Niessner, Fang Shi

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.547710

KEYWORDS: Coronagraphy, Cameras, Planets, Mirrors, Wavefront sensors, Wavefronts, Deformable mirrors, Stars, Control systems, Space telescopes

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Proceedings Article | 12 October 2004 Paper

Paper

Performance of segmented mirror coarse phasing with a dispersed fringe sensor: modeling and simulations

Fang Shi, David Redding, Joseph Green, Catherine Ohara

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552323

KEYWORDS: Visibility, Image segmentation, Point spread functions, James Webb Space Telescope, Diffraction, Sensors, Modulation, Wavefronts, Mirrors, Signal processing

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Proceedings Article | 28 September 2004 Paper

Paper

Experimental verification of dispersed fringe sensing as a segment-phasing technique using the Keck Telescope

Fang Shi, Catherine Ohara, Gary Chanan, Mitchell Troy, David Redding

Proceedings Volume 5489, (2004) https://doi.org/10.1117/12.552407

KEYWORDS: Telescopes, Space telescopes, James Webb Space Telescope, Visibility, Calibration, Sensors, Modulation, Mirrors, Diffraction, Image segmentation

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Proceedings Article | 5 March 2003 Paper

Paper

Phase retrieval camera for testing NGST optics

Andrew Lowman, David Redding, Scott Basinger, David Cohen, Jessica Faust, Joseph Green, Catherine Ohara, Fang Shi

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461168

KEYWORDS: Wavefronts, Phase retrieval, Cameras, Optical testing, Wavefront sensors, Mirrors, Camera shutters, Sensors, Computing systems, Calibration

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Proceedings Article | 5 March 2003 Paper

Paper

NGST phase retrieval camera design and calibration details

Jessica Faust, Andrew Lowman, David Redding, Scott Basinger, Joseph Green, Catherine Ohara, Fang Shi

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461747

KEYWORDS: Cameras, Calibration, Mirrors, Optical testing, Point spread functions, Camera shutters, Phase retrieval, Sensors, Wavefront sensors, Semiconductor lasers

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Proceedings Article | 5 March 2003 Paper

Paper

Wavefront sensing and control software for a segmented space telescope

Scott Basinger, Laura Burns, David Redding, Fang Shi, David Cohen, Joseph Green, Catherine Ohara, Andrew Lowman

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461188

KEYWORDS: Algorithm development, Image segmentation, MATLAB, Space telescopes, Wavefront sensors, Wavefronts, Data archive systems, Mirrors, Phase retrieval, Actuators

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Proceedings Article | 5 March 2003 Paper

Paper

Optical design and performance of the NGST wavefront control testbed

Peter Petrone, Scott Basinger, Laura Burns, Charles Bowers, Andrew Chu, David Cohen, Pamela Davila, Bruce Dean, Peter Dogota, Michael Fitzmaurice, Joseph Green, Kong Ha, William Hayden, Don Lindler, Andrew Lowman, Catherine Ohara, Mark Wilson, David Redding, Fang Shi, Barbara Zukowski

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.463280

KEYWORDS: Image segmentation, Wavefronts, Mirrors, Telescopes, Control systems, Device simulation, Adaptive optics, Actuators, CCD cameras, Space telescopes

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Proceedings Article | 5 March 2003 Paper

Paper

Segmented mirror coarse phasing with a dispersed fringe sensor: experiments on NGST's wavefront control testbed

Fang Shi, David Redding, Andrew Lowman, Charles Bowers, Laura Burns, Peter Petrone, Catherine Ohara, Scott Basinger

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461113

KEYWORDS: Segmented mirrors, Wavefronts, Visibility, Point spread functions, Sensors, Modulation, Signal detection, Image segmentation, Mirrors, Wavefront sensors

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Proceedings Article | 5 March 2003 Paper

Paper

Segmented mirror coarse phasing with white light interferometry: modeling and experimenting on NGST's wavefront control testbed

Fang Shi, David Redding, Andrew Lowman, Catherine Ohara, Laura Burns, Peter Petrone, Charles Bowers, Scott Basinger

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461127

KEYWORDS: Image segmentation, Point spread functions, Segmented mirrors, Wavefronts, Optical interferometry, Modulation, Space telescopes, Signal detection, Wavefront sensors, Visibility

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Proceedings Article | 5 March 2003 Paper

Paper

PSF monitoring and in-focus wavefront control for NGST

Catherine Ohara, David Redding, Fang Shi, Joseph Green

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461214

KEYWORDS: Point spread functions, Image segmentation, Mirrors, Wavefronts, Data modeling, Received signal strength, Space telescopes, Image processing, Computer simulations, Wavefront sensors

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Proceedings Article | 7 February 2003 Paper

Paper

Real-time wavefront processors for the next generation of adaptive optics systems: a design and analysis

Tuan Truong, Gary Brack, Mitchell Troy, Thang Trinh, Fang Shi, Richard Dekany

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459353

KEYWORDS: Digital signal processing, Adaptive optics, Actuators, Computing systems, Cameras, Wavefronts, Wavefront sensors, Optical design, Silicon, Microelectromechanical systems

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Proceedings Article | 7 February 2003 Paper

Paper

Sparse-matrix wavefront reconstruction: simulations and experiments

Fang Shi, Douglas MacMartin, Mitchell Troy, Gary Brack, Rick Burruss, Richard Dekany

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.457134

KEYWORDS: Matrices, Actuators, Wavefronts, Adaptive optics, Wavefront reconstruction, Spatial frequencies, Wavefront sensors, Sensors, Device simulation, Telescopes

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Proceedings Article | 28 July 2000 Paper

Paper

DCATT dispersed fringe sensor: modeling and experimenting with the transmissive phase plates

Fang Shi, David Redding, Charles Bowers, Andrew Lowman, Scott Basinger, Todd Norton, Peter Petrone, Pamela Davila, Mark Wilson, Rene Boucarut

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394011

KEYWORDS: Wavefronts, Mirrors, Image segmentation, Sensors, Space telescopes, Error analysis, Algorithm development, Fringe analysis, Modulation, Phase shift keying

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Proceedings Article | 28 July 2000 Paper

Paper

Telescope simulator for the Nexus wavefront control testbed

Andrew Lowman, Fang Shi, David Redding, Scott Basinger, Charles Bowers, Pamela Davila

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394014

KEYWORDS: Wavefronts, Telescopes, Device simulation, Space telescopes, Actuators, Mirrors, Image segmentation, Deformable mirrors, Wavefront sensors, Ferroelectric materials

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Proceedings Article | 28 July 2000 Paper

Paper

Wavefront control for a segmented deployable space telescope

David Redding, Scott Basinger, David Cohen, Andrew Lowman, Fang Shi, Pierre Bely, Charles Bowers, Richard Burg, Laura Burns, Pamela Davila, Bruce Dean, Gary Mosier, Todd Norton, Peter Petrone, Brendon Perkins, Mark Wilson

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393971

KEYWORDS: Image segmentation, Wavefronts, Sensors, Space telescopes, Mirrors, Actuators, Point spread functions, Cameras, Phase retrieval, Magnesium

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Proceedings Article | 28 July 2000 Paper

Paper

Initial test results from the Next Generation Space Telescope (NGST) wavefront sensing and control testbed (WCT)

Charles Bowers, Pamela Davila, Bruce Dean, Brendon Perkins, Mark Wilson, David Redding, Scott Basinger, David Cohen, Andrew Lowman, Fang Shi, Laura Burns, Michael Fitzmaurice, Todd Norton, Peter Petrone, J. Ladd Wheeler

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393972

KEYWORDS: Wavefronts, Actuators, Phase modulation, Wavefront sensors, Point spread functions, Space telescopes, Phase retrieval, Mirrors, Spatial frequencies, Sensors

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Proceedings Article | 7 July 2000 Paper

Paper

Solar system science with subarcsecond slit spectroscopy

Richard Dekany, Donald Banfield, Ben Oppenheimer, Antonin Bouchez, Michael Brown, Thomas Hayward, Bernhard Brandl, Mitchell Troy, Gary Brack, Thang Trinh, Fang Shi

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390309

KEYWORDS: Neptune, Methane, Spectroscopy, Adaptive optics, Absorption, Stars, Hydrogen, Solar system, Clouds, Calibration

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Proceedings Article | 7 July 2000 Paper

Paper

Palomar adaptive optics project: status and performance

Mitchell Troy, Richard Dekany, Gary Brack, Ben Oppenheimer, Eric Bloemhof, Thang Trinh, Frank Dekens, Fang Shi, Thomas Hayward, Bernhard Brandl

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390302

KEYWORDS: Adaptive optics, Stars, Wavefronts, Error analysis, Atmospheric modeling, Actuators, Servomechanisms, Data modeling, Atmospheric sciences, Calibration

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Proceedings Article | 11 September 1998 Paper

Paper

Performance of ChAOS on the Apache Point Observatory's 3.5-m telescope

Edward Kibblewhite, Mark Chun, James Larkin, Vijuna Scor, Fang Shi, Michael Smutko, Walter Wild

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321726

KEYWORDS: Telescopes, Adaptive optics, Chaos, Actuators, Mirrors, Wavefronts, Deformable mirrors, Cameras, Wavefront sensors, Calibration

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Proceedings Article | 11 September 1998 Paper

Paper

Design and field tests of an 8-W sum-frequency laser for adaptive optics

Edward Kibblewhite, Fang Shi

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321710

KEYWORDS: Sodium, Chemical species, Semiconductor lasers, Telescopes, Stars, Atmospheric optics, Laser development, YAG lasers, Laser optics, Optical pumping

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Proceedings Article | 11 September 1998 Paper

Paper

Adaptive optics research at Yerkes Observatory

Walter Wild, Edward Kibblewhite, Fang Shi, Eric Le Bigot, Eric Meyer

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321742

KEYWORDS: Telescopes, Adaptive optics, Stars, Mirrors, Observatories, Astronomy, Wavefront sensors, Astronomical telescopes, Wavefronts, Optical benches

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Proceedings Article | 11 September 1998 Paper

Paper

Increasing the useful field of view of an adaptive optics system

Mark Chun, Walter Wild, Fang Shi, Michael Smutko, Edward Kibblewhite, Robert Fugate, Julian Christou

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321631

KEYWORDS: Wavefronts, Adaptive optics, Stars, Telescopes, Rayleigh guide stars, Turbulence, Wavefront reconstruction, Calibration, Atmospheric optics, Atmospheric corrections

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Proceedings Article | 8 September 1998 Paper

Paper

Horizontal adaptive optics research at Yerkes Observatory

Walter Wild, Edward Kibblewhite, Eric Le Bigot, Fang Shi

Proceedings Volume 3381, (1998) https://doi.org/10.1117/12.323955

KEYWORDS: Adaptive optics, Telescopes, Observatories, Wavefronts, Mirrors, Content addressable memory, Matrices, Astronomy, Optical benches, Wavefront sensors

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Proceedings Article | 25 August 1995 Paper

Paper

Investigation of wavefront estimators using the Wavefront Control Experiment at Yerkes Observatory

Walter Wild, Edward Kibblewhite, Rodolphe Vuilleumier, Vijuna Scor, Fang Shi, Nestor Farmiga

Proceedings Volume 2534, (1995) https://doi.org/10.1117/12.217738

KEYWORDS: Actuators, Wavefronts, Adaptive optics, Matrices, Error analysis, Control systems, Telescopes, Mirrors, Observatories, Wavefront sensors

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Proceedings Article | 31 May 1994 Paper

Paper

Description of the Chicago Adaptive Optics System (ChAOS)

Edward Kibblewhite, Walter Wild, Barbara Carter, Mark Chun, Fang Shi, Michael Smutko, Vijuna Scor

Proceedings Volume 2201, (1994) https://doi.org/10.1117/12.176079

KEYWORDS: Adaptive optics, Actuators, Mirrors, Digital signal processing, Chaos, Telescopes, Deformable mirrors, Calibration, Laser development, Wavefront sensors

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Proceedings Article | 31 May 1994 Paper

Paper

Effect of hysteresis on the performance of deformable mirrors and methods of its compensation

Edward Kibblewhite, Michael Smutko, Fang Shi

Proceedings Volume 2201, (1994) https://doi.org/10.1117/12.176109

KEYWORDS: Actuators, Servomechanisms, Deformable mirrors, Mirrors, Adaptive optics, Astronomy, Control systems, Pulsed laser operation, Phase measurement, Laser guide stars

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Proceedings Article | 31 May 1994 Paper

Paper

Field tests of the Wavefront Control Experiment

Walter Wild, Edward Kibblewhite, Fang Shi, Barbara Carter, Gary Kelderhouse, Rodolphe Vuilleumier, Herbert Manning

Proceedings Volume 2201, (1994) https://doi.org/10.1117/12.176024

KEYWORDS: Adaptive optics, Mirrors, Wavefronts, Telescopes, Astronomy, Actuators, Deformable mirrors, Wavefront sensors, Observatories, Stars

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Proceedings Article | 31 May 1994 Paper

Paper

Coupling efficiency of starlight to low-order-mode optical fibers using adaptive optics: rationale and experiments using the Wavefront Control Experiment

Edward Kibblewhite, Fang Shi, Walter Wild

Proceedings Volume 2201, (1994) https://doi.org/10.1117/12.176128

KEYWORDS: Spectrographs, Adaptive optics, Stars, Wavefronts, Telescopes, Optical fibers, Single mode fibers, Astronomy, Doppler effect, Stellar astronomy

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Showing 5 of 75 publications

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