Mr. John P. Schwenker Profile

John P. Schwenker

at BAE Systems Inc

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 21 September 2012 Paper

Statistical analysis of the surface figure of the James Webb Space Telescope

Koby Smith, David Chaney, Benjamin Gallagher, John Schwenker, Paul Lightsey, Bob Brown

Proceedings Volume 8442, 84422F (2012) https://doi.org/10.1117/12.924836

KEYWORDS: Mirrors, Spatial frequencies, Monochromatic aberrations, James Webb Space Telescope, Cryogenics, Shape memory alloys, Metrology, Statistical analysis, Polishing, Space telescopes

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Proceedings Article | 3 August 2010 Paper

Survey of interferometric techniques used to test JWST optical components

Ron Eng, James Hadaway, Dave Chaney, Ben Gallagher, W. Scott Smith, Lee Dettmann, Rob Bernier, Patrick Johnson, Jay Daniel, Bob Brown, Ankit Patel, Allen Lee, Michael Messerly, Chris Alongi, Martin Seilonen, Adam Magruder, Glen Cole, Doug Leviton, John Schwenker, Andrea Arneson, Pat Reardon, Robert Garfield, H. Philip Stahl, Koby Smith

Proceedings Volume 7790, 779002 (2010) https://doi.org/10.1117/12.862234

KEYWORDS: Mirrors, Interferometers, Metrology, James Webb Space Telescope, Optical testing, Computer generated holography, Optical components, Cryogenics, Interferometry, Optical fabrication

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Proceedings Article | 20 September 2007 Paper

Using multifield measurements to eliminate alignment degeneracies in the JWST testbed telescope

John Schwenker, Doug Leviton, Scott Acton, Tim Towell, Adam Contos, Larkin Carey, Duncan Shields, Erin Sabatke

Proceedings Volume 6687, 668707 (2007) https://doi.org/10.1117/12.736309

KEYWORDS: Mirrors, James Webb Space Telescope, Wavefronts, Space telescopes, Telescopes, Image segmentation, Monochromatic aberrations, Phase retrieval, Matrix multiplication, Wavefront sensors

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Proceedings Article | 20 September 2007 Paper

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

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

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

TRL-6 for JWST wavefront sensing and control

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

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 | 6 July 2006 Paper

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

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

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 | 12 October 2004 Paper

On-orbit performance of the MIPS instrument

Luisa Rebull, Bryce Unruh, Alberto Noriega-Crespo, Marcia Rieke, Jane Morrison, Eiichi Egami, Erick Young, Susan Stolovy, Stefanie Wachter, Jeonghee Rho, Myra Blaylock, William Wheaton, Chris Miller, Jocelyn Keene, Dean Hines, J. Douglas Bean, Karl Stapelfeldt, Harry Garner, Pablo Perez-Gonzalez, Nanyao Lu, Casey Papovich, Joannah Hinz, Eugene Haller, Peter Ade, David Michika, Stephen Gaalema, Gerry Neugebauer, S. Siewert, Karl Gordon, Thomas Gautier, R. Warden, Jeffrey Beeman, David Frayer, Almudena Alonso-Herrero, George Rieke, Mark Neitenbach, Thomas Glenn, Kim MacFeely, Jeremiah Winghart, Frank Low, M. Hegge, Charles Engelbracht, Douglas Kelly, Frank Masci, James Muzerolle, Paul Smith, Kate Su, John Stansberry, Monte Henderson, R. Woodruff, Jeremy Mould, Donald Strecker, G. Rivlis, William Latter, John Troeltzsch, R. Ordonez, Deborah Padgett, William Burmester, Charles Beichman, S. Tennant, James Cadien, John Schwenker, E. Arens, Misha Pesenson, Lee Bennett, Emeric LeFloch, Charles Lada, Gerald Heim, David Henderson, Paul Richards, Herve Dole, Karl Misselt

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551965

KEYWORDS: Sensors, Mirrors, Electronics, Photometry, Detector arrays, Space telescopes, Far infrared, Calibration, Aluminum, Infrared radiation

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Proceedings Article | 12 October 2004 Paper

The state of the focus and image quality of the Spitzer Space Telescope as measured in orbit

Amanda Mainzer, Dean Hines, John Schwenker, Edward Romana, John Mentzell, Joseph Hora, Lee Armus, William Hoffmann, David Elliott, Robert Gehrz, Karl Stapelfeldt, Peter Eisenhardt, Erick Young, Bernhard Brandl

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551930

KEYWORDS: Telescopes, Space telescopes, Mirrors, Point spread functions, Diffraction, Cryogenics, Image quality, Infrared telescopes, Infrared imaging, Tolerancing

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Proceedings Article | 12 October 2004 Paper

Determination of Spitzer Space Telescope focus from IRAC images without a focus slew

Joseph Hora, Peter Eisenhardt, John Schwenker, Sean Carey, S. Megeath, John Mentzell, William Hoffmann, Catherine Marx

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550649

KEYWORDS: Telescopes, Stars, Space telescopes, Device simulation, Diffraction, Point spread functions, Aerospace engineering, Image analysis, Image processing, Phase retrieval

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Proceedings Article | 24 September 2004 Paper

Current concepts for cryogenic optical testing of the JWST secondary mirror

John Schwenker, Robert Brown, Joseph Sullivan, Koby Smith

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.554420

KEYWORDS: Mirrors, James Webb Space Telescope, Optical spheres, Cryogenics, Optical testing, Aspheric lenses, Wavefronts, Aerospace engineering, Spherical lenses, Tolerancing

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Proceedings Article | 5 March 2003 Paper

SIRTF-CTA optical performance test

William Burmester, Phillip Quigley, Joseph Hora, Jeff Van Cleve, Amanda Mainzer, Bernhard Brandl, John Schwenker

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461918

KEYWORDS: Space telescopes, Infrared imaging, Telescopes, Short wave infrared radiation, Optical fabrication, Mirrors, Optical testing, Fermium, Frequency modulation, Wavefronts

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Proceedings Article | 5 March 2003 Paper

SIRTF-CTA optical performance test results

John Mentzell, William Hoffmann, Bernhard Brandl, Joseph Hora, Amanda Mainzer, John Schwenker, Jeff Van Cleve

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461925

KEYWORDS: Telescopes, Wavefronts, Fermium, Frequency modulation, Phase retrieval, Space telescopes, Mirrors, Infrared telescopes, Infrared imaging, Performance modeling

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Proceedings Article | 16 November 2000 Paper

Performance of the multiband imaging photometer for SIRTF

Peter Ade, S. Siewert, T. Horne, Doug Kelly, C. Yanoski, G. Rivlis, Gerald Heim, John Stansberry, A. Noriega-Crespa, Erick Young, Thomas McMahon, Jeffrey Beeman, George Rieke, M. Henderson, John Schwenker, William Burmester, Gregory Winters, Kimberly Ennico, M. Hegge, James Cadien, M. Neitenbach, Karl Gordon, Richard Schnurr, Donald Strecker

Proceedings Volume 4131, (2000) https://doi.org/10.1117/12.406571

KEYWORDS: Detector arrays, Mirrors, Telescopes, Optical filters, Optical alignment, Space telescopes, Electronics, Far infrared, Photometry, Space operations

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Proceedings Article | 28 August 1998 Paper

Multiband imaging photometer for SIRTF

Craig Thompson, R. Warden, Erick Young, John Schwenker, David Michika, R. Pearson, Donald Strecker, Kim MacFeely, M. Henderson, D. Wilson, Thomas McMahon, G. B. Heim, George Rieke

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324501

KEYWORDS: Mirrors, Staring arrays, Electronics, Sensors, Control systems, Space telescopes, Germanium, Space operations, Telescopes, Cryogenics

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Proceedings Article | 21 August 1998 Paper

NICMOS cold-well displacement monitor: a portable Hubble simulator

Rodger Thompson, John Mentzell, Malcolm McIntosh, John Schwenker

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317227

KEYWORDS: Code division multiplexing, Cameras, Monochromatic aberrations, Relays, Interfaces, Calibration, Hubble Space Telescope, Mirrors, Wavefronts, Lenses

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Showing 5 of 15 publications

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