Dr. Babak N. Saif Profile

Dr. Babak N. Saif

at NASA

SPIE Involvement:

Author

Publications (22)

SPIE Journal Paper | 15 November 2023 Open Access

Open Access

James Webb Space Telescope optical stability lessons learned for future great observatories

Lee Feinberg, Michael McElwain, Charles Bowers, John Johnston, Gary Mosier, Randy Kimble, Joshua Levi, Lightsey, Ball Aerospace, Boulder, Colorado, United States, J. Knight, Marcel Bluth, Alden Jurling, Marie Levine, D. Scott Acton, Charles Atkinson, Allison Barto, Matthew Bergkoetter, Gregory Brady, Larkin Carey, Lester Cohen, Laura Coyle, Bruce Dean, Michael Eisenhower, Nicolas Flagey, George Hartig, Keith Havey, Brian Hicks, Joseph Howard, Ritva Keski-Kuha, Charles-Philippe Lajoie, Matthew Lallo, Gary Matthews, Marcio Meléndez, Michael Menzel, Sang Park, Marshall Perrin, Laurent Pueyo, Lisbeth Quesnel, Paul Reynolds, Jane Rigby, Babak Saif, Christopher Stark, Randal Telfer, Scott Texter, Julie Van Campen, Begona Vila, Garrett West, Erin Wolf, Tony Whitman, Thomas Zielinski

JATIS, Vol. 10, Issue 01, 011204, (November 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.10.1.011204

KEYWORDS: James Webb Space Telescope, Telescopes, Inspection, Online learning, Observatories, Thermal stability, Temperature metrology, Design, Cryogenics, Interfaces

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Proceedings Article | 27 August 2022 Presentation + Paper

Presentation + Paper

Ultra-stable structures lab (USS)

Lee Feinberg, Babak Saif, A. Marcel Bluth, Perry Greenfield, Sang Park, Peter Petrone, Ritva Keski-Kuha, Alden Jurling, Chuck Bowers

Proceedings Volume 12180, 121802M (2022) https://doi.org/10.1117/12.2626490

KEYWORDS: James Webb Space Telescope, Control systems, Calibration, Mirrors, Telescopes, Temperature metrology, Space telescopes, Interferometers, Metrology, Data modeling

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Proceedings Article | 9 September 2021 Open Access

Open Access

Presentation + Paper

High-speed interferometry for James Webb Space Telescope testing

B. Saif, L. Feinberg, R. Keski-Kuha

Proceedings Volume 11813, 118130U (2021) https://doi.org/10.1117/12.2570872

KEYWORDS: Mirrors, James Webb Space Telescope, Interferometers, Cryogenics, Interferometry, Telescopes, Optical alignment, Composites, Monochromatic aberrations, Metrology

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Proceedings Article | 27 August 2021 Open Access

Open Access

Presentation

Government Panel Discussion

Babak Saif, Carl Williams, Dominique Dagenais

Proceedings Volume 11918, 119180T (2021) https://doi.org/10.1117/12.2611209

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Proceedings Article | 9 September 2019 Paper

Paper

Picometer level spatial metrology for next generation telescopes

Babak Saif, Ritva Keski-Kuha, Perry Greenfield, Michael North-Morris, Marcel Bluth, Lee Feinberg, J. Wyant, S. Park

Proceedings Volume 11115, 111150K (2019) https://doi.org/10.1117/12.2543034

KEYWORDS: Metrology, Telescopes, Mirrors, Space observatories, Wavefronts, Optical alignment, Mirror structures, High speed electronics, Speckle pattern, Interferometers

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Proceedings Article | 6 July 2018 Paper

Paper

JWST optical telescope element center of curvature test

Babak Saif, Ritva Keski-Kuha, David Chaney, Perry Greenfield, Kyle Van Gorkom, Keira Brooks, Warren Hack, Marcel Bluth, Josh Bluth, James Sanders, Koby Smith, Larkin Carey, Sze Chaung, Lee Feinberg, Severine Tournois, W. Scott Smith, Vladimir Kradinov

Proceedings Volume 10698, 106983M (2018) https://doi.org/10.1117/12.2313029

KEYWORDS: Mirrors, Space telescopes, Monochromatic aberrations, James Webb Space Telescope, Computer generated holography, Telescopes, Interferometers, Optical testing, Optical alignment, Optical fabrication

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Proceedings Article | 5 September 2017 Presentation + Paper

Presentation + Paper

JWST center of curvature test method and results

Babak Saif, David Chaney, Perry Greenfield, Kyle Van Gorkom, Keira Brooks, Warren Hack, Marcel Bluth, Josh Bluth, James Sanders, Koby Smith, Larkin Carey, Sze Chaung, Ritva Keski-Kuha, Lee Feinberg, Severine Tournois, W. Scott Smith, Vladimir Kradinov

Proceedings Volume 10401, 104010T (2017) https://doi.org/10.1117/12.2273974

KEYWORDS: James Webb Space Telescope, Mirrors, Space telescopes, Telescopes, Interferometers, Metrology, Optical fabrication equipment, Optical telescopes, Optical components, Optical fabrication

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Proceedings Article | 2 August 2014 Paper

Paper

New method for characterizing the state of optical and opto-mechanical systems

Babak Saif, Ritva Keski-Kuha, Lee Feinberg, David Chaney, Marcel Bluth, Perry Greenfield, Warren Hack, Scott Smith, James Sanders

Proceedings Volume 9143, 91430C (2014) https://doi.org/10.1117/12.2055243

KEYWORDS: Mirrors, Space telescopes, Computer generated holography, James Webb Space Telescope, Telescopes, Interferometers, Monochromatic aberrations, Neodymium, Metrology, Data acquisition

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Proceedings Article | 27 September 2011 Paper

Paper

Electronic speckle pattern interferometric testing of JWST primary mirror segment assembly

Koby Smith, David Chaney, Babak Saif

Proceedings Volume 8126, 81260N (2011) https://doi.org/10.1117/12.889142

KEYWORDS: Mirrors, Optical fabrication, Speckle pattern, James Webb Space Telescope, Surface finishing, Optical testing, Interferometers, Acoustics, Speckle, Interferometry

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Proceedings Article | 5 May 2010 Paper

Paper

Image processing for alignment of aspheric optics without fiducials

Babak Saif, Perry Greenfield, Warren Hack, Ritva Keski-Kuha, Lee Feinberg, David Chaney

Proceedings Volume 7723, 772309 (2010) https://doi.org/10.1117/12.853992

KEYWORDS: Image segmentation, Mirrors, Phase modulation, Monochromatic aberrations, Image processing, James Webb Space Telescope, Computer generated holography, Image filtering, Optical alignment, Space telescopes

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Proceedings Article | 22 August 2009 Paper

Paper

Trades for ambient non-contact metrology

R. Ohl, B. Hoffmann Eegholm, M. Casas, B. Frey, M. Dominguez, J. Gill, J. Hayden, P. Morken, K. Redman, V. Roberts, B. Saif, T. Scirpo

Proceedings Volume 7433, 743306 (2009) https://doi.org/10.1117/12.831303

KEYWORDS: Mirrors, Lawrencium, James Webb Space Telescope, Metrology, LIDAR, Cryogenics, Space telescopes, Glasses, Composites, Optical testing

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Proceedings Article | 11 August 2008 Paper

Paper

Spatially phase-shifted digital speckle pattern interferometry (SPS-DSPI) and cryogenic structures: recent improvements

Peter Blake, Perry Greenfield, Warren Hack, J. Todd Miller, Ivo Busko, Babak Saif, Bente Eegholm, Ritva Keski-Kuha, Marcel Bluth

Proceedings Volume 7063, 706306 (2008) https://doi.org/10.1117/12.797467

KEYWORDS: James Webb Space Telescope, Speckle pattern, Phase shifts, Error analysis, Interferometers, Interferometry, Logic, Phase measurement, Temperature metrology, Cryogenics

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Proceedings Article | 12 July 2008 Paper

Paper

Development of interferometry for testing the JWST Optical Telescope Element (OTE)

Ritva Keski-Kuha, Babak Saif, Bente Eegholm, Peter Blake

Proceedings Volume 7010, 70100R (2008) https://doi.org/10.1117/12.789608

KEYWORDS: Interferometers, Mirrors, James Webb Space Telescope, Cryogenics, Space telescopes, Telescopes, Interferometry, Optical testing, Speckle pattern, Motion measurement

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Proceedings Article | 20 September 2007 Paper

Paper

Development of electronic speckle pattern interferometry for testing JWST composite structures

Babak Saif, Marcel Bluth, Bente Eegholm, Perry Greenfield, Warren Hack, Ritva Keski-Kuha, Peter Blake

Proceedings Volume 6687, 668704 (2007) https://doi.org/10.1117/12.734859

KEYWORDS: James Webb Space Telescope, Interferometers, Cryogenics, Mirrors, Temperature metrology, Speckle pattern, Calibration, Composites, Space telescopes, Interferometry

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Proceedings Article | 12 September 2007 Paper

Paper

Technology demonstration of large stable cryogenic composite structures for JWST

Charles Atkinson, Jonathan Arenberg, Larry Gilman, Ted Messer, Patty May, Dave Moon, Kevin Patton, Jim York, Stan Backovsky, Jim Tucker, Marcel Bluth, Babak Saif, Ritva Keski-Kuha, Jeff Kegley, Bente Eegholm

Proceedings Volume 6687, 668703 (2007) https://doi.org/10.1117/12.734753

KEYWORDS: Curium, James Webb Space Telescope, Cryogenics, Composites, Temperature metrology, Space telescopes, Mirrors, Manufacturing, Metrology, Analytical research

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Proceedings Article | 13 June 2006 Paper

Paper

The JWST backplane stability test article: a critical technology demonstration

Jonathan Arenberg, Larry Gilman, Nick Abbruzze, Justin Reuter, Kristen Anderson, Jas Jahic, Joseph Yacoub, Hector Padilla, Charles Atkinson, Dave Moon, Kevin Patton, Patty May, Jim York, Ted Messer, Stan Backovsky, Jim Tucker, Chris Harvey, Bente Eegholm, Barbara Zukowski, Peter Blake

Proceedings Volume 6265, 62650Q (2006) https://doi.org/10.1117/12.671714

KEYWORDS: Distortion, James Webb Space Telescope, Manufacturing, Magnetism, Temperature metrology, Composites, 3D modeling, Aluminum, Space telescopes, Metrology

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Proceedings Article | 19 August 2005 Paper

Paper

Dynamic phase-shifting electronic speckle pattern interferometer

Michael North Morris, James Millerd, Neal Brock, John Hayes, Babak Saif

Proceedings Volume 5869, 58691B (2005) https://doi.org/10.1117/12.620619

KEYWORDS: Interferometers, Phase shifts, Speckle pattern, Speckle, Charge-coupled devices, Interferometry, James Webb Space Telescope, Phase shifting, Pulsed laser operation, Phase measurement

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Proceedings Article | 24 September 2004 Paper

Paper

Instantaneous phase-shifted speckle interferometer for measurement of large optical structures

Babak Saif, James Millerd, Ritva Keski-Kuha, Lee Feinberg, James Wyant

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.550847

KEYWORDS: Carbon, Interferometers, Mirrors, Phase shifts, Phase interferometry, Speckle, Phase shifting, James Webb Space Telescope, Optical testing, Reflectivity

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Proceedings Article | 28 July 2000 Paper

Paper

NGST OTA optical metrology instrumentation and conceptual approaches

Ritva Keski-Kuha, Pierre Bely, Richard Burg, James Burge, Pamela Davila, Joseph Geary, John Hagopian, David Jacobson, Andrew Lowman, Steven Macenka, John Mangus, Charles Perrygo, David Redding, Babak Saif, W. Scott Smith, James Wyant

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394050

KEYWORDS: Mirrors, Cryogenics, Interferometers, Wavefronts, Interferometry, Calibration, Computer generated holography, Optical testing, Phase shifts, Telescopes

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Proceedings Article | 28 August 1998 Paper

Paper

Tunable filter for the vacuum ultraviolet

Andrew Smith, Bert Pasquale, Qian Gong, Babak Saif

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324444

KEYWORDS: Mirrors, Telescopes, Sensors, Optical filters, Image filtering, Cameras, Tunable filters, Spatial resolution, Ultraviolet radiation, Vacuum ultraviolet

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Proceedings Article | 8 December 1992 Paper

Paper

POLARIS-II: an acousto-optic imaging spectropolarimeter for ground-based astronomy

David Glenar, J. Hillman, Babak Saif, J. Bergstrahl

Proceedings Volume 1747, (1992) https://doi.org/10.1117/12.138833

KEYWORDS: Polarization, Crystals, Acoustics, Acousto-optics, Remote sensing, Diffraction, Spectral resolution, Mirrors, Cameras, Astronomy

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Proceedings Article | 1 June 1991 Paper

Paper

Far-field and wavefront characterization of a high-power semiconductor laser for free-space optical communications

Donald Cornwell, Babak Saif

Proceedings Volume 1417, (1991) https://doi.org/10.1117/12.43773

KEYWORDS: Modulation, Wavefronts, Continuous wave operation, Semiconductor lasers, Free space optical communications, Phase measurement, Laser applications, Laser communications

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Showing 5 of 22 publications

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