Dr. Xu Wang Profile

Dr. Xu Wang

Senior Engineer at Jet Propulsion Lab

SPIE Involvement:

Author

Publications (22)

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 | 22 June 2016

Extension of ATLAST/LUVOIR’s capabilities to 5 μm or beyond

Michael Werner, Mark Swain, Gautam Vasisht, Xu Wang, Steven Macenka, Avi Mandell, Shawn Domagal-Goldman, Joel Green, Christopher Stark

JATIS, Vol. 2, Issue 04, 041205, (June 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.4.041205

KEYWORDS: Stars, Exoplanets, Space telescopes, Telescopes, Planets, Spectroscopy, Infrared telescopes, Infrared radiation, Earth's atmosphere, James Webb Space Telescope

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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

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 | 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 | 15 September 2011 Paper

Paper

Micropixel-level image position sensing testbed

Bijan Nemati, Michael Shao, Chengxing Zhai, Hernan Erlig, Renaud Goullioud, Xu Wang

Proceedings Volume 8151, 81510W (2011) https://doi.org/10.1117/12.894477

KEYWORDS: Metrology, Stars, Charge-coupled devices, Telescopes, Point spread functions, Quantum efficiency, Optical fibers, Calibration, Space telescopes, Mirrors

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Proceedings Article | 22 July 2010 Paper

Paper

Results of the Guide-2 telescope testbed for the SIM Light Astrometric Observatory

I. Hahn, M. Weilert, J. Sandhu, X. Wang, R. Smythe, E. Hovland, F. Loya, J. Shields, D. Boussalis, N. Fathpour, B. Kang, A. Ahmed, G. Macala, F. Nicaise, M. Morales, F. Dekens, R. Goullioud

Proceedings Volume 7734, 77344H (2010) https://doi.org/10.1117/12.856531

KEYWORDS: Stars, Telescopes, Interferometers, Space telescopes, Charge-coupled devices, Mirrors, Metrology, Calibration, Sensors, Ferroelectric materials

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Proceedings Article | 22 July 2010 Paper

Paper

SIM interferometer testbed (SCDU) status and recent results

Bijan Nemati, Xin An, Renaud Goullioud, Michael Shao, Tsae-Pyng Shen, Udo Wehmeier, Mark Weilert, Xu Wang, Thomas Werne, Janet Wu, Chengxing Zhai

Proceedings Volume 7734, 77341N (2010) https://doi.org/10.1117/12.856300

KEYWORDS: Stars, Calibration, Interferometers, Error analysis, Metrology, Wavefronts, Spectral calibration, CCD cameras, Cameras, Light sources

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Proceedings Article | 22 July 2010 Paper

Paper

SCDU (Spectral Calibration Development Unit) testbed narrow angle astrometric performance

Xu Wang, Renaud Goullioud, Bijan Nemati, Michael Shao, Udo Wehmeier, Mark Weilert, Thomas Werne, Janet Wu, Chengxing Zhai

Proceedings Volume 7734, 77344J (2010) https://doi.org/10.1117/12.857278

KEYWORDS: Calibration, Stars, Spectral calibration, Interferometers, Optical filters, Picosecond phenomena, Error analysis, Data processing, Exoplanets, Metrology

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Proceedings Article | 22 July 2010 Paper

Paper

Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite

Bijan Nemati, Xin An, Renaud Goullioud, Michael Shao, Tsae-Pyng Shen, Udo Wehmeier, Mark Weilert, Xu Wang, Thomas Werne, Janet Wu, Chengxing Zhai

Proceedings Volume 7734, 77344I (2010) https://doi.org/10.1117/12.857778

KEYWORDS: Stars, Interferometers, Metrology, Cameras, Wavefronts, Point spread functions, Charge-coupled devices, Optical alignment, CCD cameras, Beam splitters

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Proceedings Article | 22 July 2010 Paper

Paper

SIM Lite mission spectral calibration sensitivities and refinements

C. Zhai, X. An, R. Goullioud, B. Nemati, M. Shao, J. Shen, X. Wang, U. Wehmeier, M. Weilert, T. Werne, J. Wu

Proceedings Volume 7734, 77341J (2010) https://doi.org/10.1117/12.856336

KEYWORDS: Calibration, Spectral calibration, Error analysis, Stars, Modulation, Ferroelectric materials, Data modeling, Phase shift keying, Fourier transforms, Optical filters

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Proceedings Article | 22 July 2010 Paper

Paper

SCDU testbed automated in-situ alignment, data acquisition, and analysis

Thomas Werne, Udo Wehmeier, Janet Wu, Xin An, Renaud Goullioud, Bijan Nemati, Michael Shao, Tsae-Pyng Shen, Xu Wang, Mark Weilert, Chengxing Zhai

Proceedings Volume 7734, 77344F (2010) https://doi.org/10.1117/12.857525

KEYWORDS: MATLAB, Computing systems, Cameras, Data storage, Data processing, Data acquisition, Distributed computing, Human-machine interfaces, Control systems, Real-time computing

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Proceedings Article | 28 July 2008 Paper

Paper

The mask designs for Space Interferometer Mission (SIM)

Xu Wang

Proceedings Volume 7013, 701352 (2008) https://doi.org/10.1117/12.787256

KEYWORDS: Interferometers, Metrology, Diffraction, Sensors, Heterodyning, Beam propagation method, Tolerancing, Error analysis, Performance modeling, Wavefronts

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Proceedings Article | 28 June 2006 Paper

Paper

Corner cube model for internal metrology system of Space Interferometer Mission (SIM)

Xu Wang, Robert Korechoff, Mike Heflin, Lisa Sievers

Proceedings Volume 6268, 62682P (2006) https://doi.org/10.1117/12.670105

KEYWORDS: Metrology, Error analysis, Reflection, Coating, Interferometers, Geometrical optics, Visual process modeling, Visualization, Diffraction, Mirrors

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Proceedings Article | 14 February 2005 Paper

Paper

Corner cube model for Microarcsec Metrology (MAM) testbed in Space Interferometer Mission (SIM)

Xu Wang

Proceedings Volume 5776, (2005) https://doi.org/10.1117/12.611625

KEYWORDS: Metrology, Reflection, Data modeling, Interferometers, Error analysis, Coating, Phase shifts, Stars, Data processing, Mirrors

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Proceedings Article | 20 October 2004 Paper

Paper

Subnanometer level model validation of the SIM interferometer

Robert Korechoff, Daniel Hoppe, Xu Wang

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550153

KEYWORDS: Data modeling, Diffraction, Metrology, Interferometers, Laser induced plasma spectroscopy, Reflection, Phase shifts, Sensors, Mirrors, Wave propagation

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Proceedings Article | 1 June 1999 Paper

Paper

Liquid crystal on silicon beam deflector

Xu Wang, Demetri Psaltis

Proceedings Volume 3633, (1999) https://doi.org/10.1117/12.349322

KEYWORDS: Liquid crystals, Diffraction, Electrodes, Liquid crystal on silicon, Very large scale integration, Beam steering, Crystals, Diffraction gratings, Metals, Refractive index

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Proceedings Article | 5 November 1998 Paper

Paper

Liquid crystal blazed grating beam deflector

Xu Wang, Daniel Wilson, Richard Muller, Paul Maker, Demetri Psaltis

Proceedings Volume 3468, (1998) https://doi.org/10.1117/12.330436

KEYWORDS: Diffraction gratings, Polymethylmethacrylate, Liquid crystals, Diffraction, Refractive index, Glasses, Beam steering, Prisms, Molecules, Optical alignment

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Showing 5 of 22 publications

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