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

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

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

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

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

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

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

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 | 6 July 2006 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 | 12 October 2004 Paper

On-orbit performance of the MIPS instrument

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

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

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

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

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

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

Koby Smith, John Schwenker, Robert Brown, Joseph Sullivan

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

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

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

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

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

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

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

John Mentzell, Malcolm McIntosh, John Schwenker, Rodger Thompson

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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