Dr. Lenward T. Seals Profile

Dr. Lenward T. Seals

Optical Engineer at NASA Goddard Space Flight Center

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Publications (13)

Proceedings Article | 18 July 2024 Poster + Paper

Optical design of multi-field integral field unit spectrograph for the ORCAS Keck Instrument Development II (ORKID II) instrument

Bert Pasquale, Eliad Peretz, Guangjun Gao, Peter Kurczynski, Victor Chambers, Lenward Seals, Max Millar-Blanchaer, Peter Wizinowich, Marc Kassis, Peter Plavchan, Molly Adams

Proceedings Volume 13096, 1309660 (2024) https://doi.org/10.1117/12.3019837

KEYWORDS: Mirrors, Design, Spectrographs, Optical design, Spectral resolution, Optical surfaces, Optical components, Manufacturing, Iterated function systems, Optical instrument design

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Proceedings Article | 5 October 2023 Presentation + Paper

Further progress toward enabling a deployable shape memory alloy normal incidence space telescope for the extreme ultraviolet

Melville Ulmer, Daniel Quispe, Len Seals, Giovanni De Vita, S. Stagon, Nicholas Asbury, D. Buchholz, Jian Cao, Y.-W. Chung, Raj Vaidyanathan

Proceedings Volume 12679, 126790A (2023) https://doi.org/10.1117/12.2677459

KEYWORDS: Extreme ultraviolet, Polishing, Shape memory alloys, Mirrors, Coating, Surface finishing, Magnetism, Education and training, Polymers, Space telescopes

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SPIE Journal Paper | 3 February 2021 Open Access

Optical design of the Origins Space Telescope

James Corsetti, Joseph Howard, J. Scott Knight, Len Seals

JATIS, Vol. 7, Issue 01, 011010, (February 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.1.011010

KEYWORDS: Mirrors, Telescopes, Optical design, Space telescopes, Wavefronts, Optical instrument design, Spectroscopy, Observatories, James Webb Space Telescope, Surface roughness

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SPIE Journal Paper | 6 January 2021 Open Access

Origins Space Telescope: baseline mission concept

Edward Amatucci, Lynn Allen, Jonathan Arenberg, Lee Armus, Cara Battersby, James Bauer, Porfirio Beltran, Dominic Benford, Denis Burgarella, Ruth Carter, Danny Chi, Asantha Cooray, James Corsetti, Elvire De Beck, Larry Dewell, Michael DiPirro, Matthew East, Samantha Edgington, Kimberly Ennico, Louis Fantano, David Folta, Joseph Generie, Zachary Granger, Thomas Greene, Alex Griffiths, George Harpole, Frank Helmich, Joseph Howard, Tracee Jamison, Lisa Kaltenegger, Tiffany Kataria, Charles Lawrence, Margaret Meixner, Ted Mooney, Samuel Moseley, Susan Neff, Thanh Nguyen, Alison Nordt, Michael Petach, Susanna Petro, Alexandra Pope, Daniel Ramspacker, Alison Rao, Itsuki Sakon, Karin Sandstrom, Douglas Scott, Lenward Seals, Kartik Sheth, Steven Tompkins, Cassandra Webster, Martina Wiedner, Edward Wright, Chi Wu, Jonas Zmuidzinas, David Leisawitz, Bob Beaman, Raymond Bell, Edward Bergin, Jeffrey Bolognese, Charles Bradford, Damon Bradley, Sean Carey, Tom D'Asto, Kevin Denis, Christopher Derkacz, C. Paul Earle, Gregory Feller, Jonathan Fortney, Benjamin Gavares, Maryvonne Gerin, Keith Harvey, Lawrence Hilliard, Michael Jacoby, Anisa Jamil, J. Scott Knight, Perry Knollenberg, Paul Lightsey, Sarah Lipscy, Eric Mamajek, Gregory Martins, John Mather, Gary Melnick, Stefanie Milam, Desika Narayanan, Jeffrey Olson, Deborah Padgett, John Pohner, Klaus Pontoppidan, Thomas Roellig, Carly Sandin, Larry Sokolsky, Johannes Staguhn, John Steeves, Kevin Stevenson, Eric Stoneking, Kate Su, Kiarash Tajdaran, Joaquin Vieira

JATIS, Vol. 7, Issue 01, 011002, (January 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.1.011002

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Proceedings Article | 9 September 2019 Paper

Optical design of the Origins space telescope

James Corsetti, Edward Amatucci, Ruth Carter, Tom D'Asto, Michael DiPirro, Benjamin Gavares, Joseph Howard, David Leisawitz, Gregory Martins, Margaret Meixner, Len Seals

Proceedings Volume 11115, 1111513 (2019) https://doi.org/10.1117/12.2530641

KEYWORDS: Optical design, Space telescopes, Galactic astronomy, Telescopes, Spectroscopy, Astronomy, Astrophysics, Exoplanets, Solar system, Mirrors

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Proceedings Article | 9 September 2019 Open Access

The Origins Space Telescope

D. Leisawitz, E. Amatucci, L. Allen, J. Arenberg, L. Armus, C. Battersby, B. Beaman, J. Bauer, R. Bell, P. Beltran, D. Benford, E. Bergin, J. Bolognese, C. Bradford, D. Bradley, D. Burgarella, S. Carey, R. Carter, J. Chi, A. Cooray, J. Corsetti, T. D'Asto, E. De Beck, K. Denis, C. Derkacz, L. Dewell, M. DiPirro, C. P. Earle, M. East, S. Edgington, K. Ennico, L. Fantano, G. Feller, A. Flores, D. Folta, J. Fortney, B. Gavares, J. Generie, M. Gerin, Z. Granger, T. Greene, A. Griffiths, G. Harpole, K. Harvey, F. Helmich, G. Helou, L. Hilliard, J. Howard, M. Jacoby, A. Jamil, T. Jamison, L. Kaltenegger, T. Kataria, J. S. Knight, P. Knollenberg, C. Lawrence, P. Lightsey, S. Lipscy, C. Lynch, E. Mamajek, G. Martins, J. Mather, M. Meixner, G. Melnick, S. Milam, T. Mooney, S. Moseley, D. Narayanan, S. Neff, T. Nguyen, A. Nordt, J. Olson, D. Padgett, M. Petach, S. Petro, J. Pohner, K. Pontoppidan, A. Pope, D. Ramspacher, A. Rao, G. Rieke, M. Rieke, T. Roellig, I. Sakon, C. Sandin, K. Sandstrom, D. Scott, L. Seals, K. Sheth, J. Staguhn, J. Steeves, K. Stevenson, L. Stokowski, E. Stoneking, K. Su, K. Tajdaran, S. Tompkins, J. Turner, J. Vieira, C. Webster, M. Wiedner, E. Wright, C. Wu, J. Zmuidzinas

Proceedings Volume 11115, 111150Q (2019) https://doi.org/10.1117/12.2530514

KEYWORDS: Galactic astronomy, Planets, Stars, Telescopes, Astronomy, James Webb Space Telescope, Sensors, Space telescopes, Exoplanets, Observatories

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Proceedings Article | 6 July 2018 Presentation + Paper

Optomechanical modeling of the optical telescope element and integrated science instrument module (OTIS) cryo-vacuum test for the James Webb Space Telescope (JWST)

Ryan Irvin, Scott Rohrbach, Lenward Seals, Dennis Skelton

Proceedings Volume 10698, 1069806 (2018) https://doi.org/10.1117/12.2314487

KEYWORDS: James Webb Space Telescope, Point spread functions, Solid modeling, Instrument modeling, Ray tracing, Optical design software

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Proceedings Article | 6 July 2018 Paper

Stray light overview for the Origins Space telescope

Paul Lightsey, Lenward Seals, Michael DiPirro, David Leisawitz, Jonathan Arenberg

Proceedings Volume 10698, 1069845 (2018) https://doi.org/10.1117/12.2312268

KEYWORDS: Stray light, Telescopes, Space telescopes, Observatories, James Webb Space Telescope, Mirrors, Sun, Ray tracing, Sensors

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Proceedings Article | 28 September 2016 Presentation + Paper

Stray light modeling of the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM)

Scott Rohrbach, Ryan Irvin, Lenward Seals, Dennis Skelton

Proceedings Volume 9947, 99470K (2016) https://doi.org/10.1117/12.2238827

KEYWORDS: Stray light, James Webb Space Telescope, Optical components, Sensors, Scattering, Light scattering, Staring arrays, Solid modeling, Optical filters, Mirrors

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Proceedings Article | 19 July 2016 Paper

Dealing with beam structure in PIXIE

D. Fixsen, Alan Kogut, Robert Hill, Peter Nagler, Lenward Seals, Joseph Howard

Proceedings Volume 9914, 99141B (2016) https://doi.org/10.1117/12.2232717

KEYWORDS: Polarization, Fourier transforms, Beam shaping, Sensors, Solar concentrators, Fourier transforms, Calibration, Mirrors, Polarizers, Stray light, Signal detection

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Proceedings Article | 17 December 2014 Paper

Optical design of the WFIRST-AFTA wide-field instrument

Bert Pasquale, David Content, Jeffery Kruk, David Vaughnn, Qian Gong, Joseph Howard, Alden Jurling, Len Seals, Eric Mentzell, Nerses Armani, Gary Kuan

Proceedings Volume 9293, 929305 (2014) https://doi.org/10.1117/12.2177847

KEYWORDS: Mirrors, Telescopes, Optical design, Space telescopes, Staring arrays, Sensors, James Webb Space Telescope, Infrared telescopes, Observatories, Ray tracing

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SPIE Journal Paper | 1 September 2013

Telescopes for space-based gravitational wave missions

Jeffrey Livas, Petar Arsenovic, John Crow, Peter Hill, Joseph Howard, Lenward Seals, Shahram Shiri

OE, Vol. 52, Issue 09, 091811, (September 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.9.091811

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Proceedings Article | 21 September 2012 Paper

Global alignment optimization strategies, procedures, and tools for the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM)

Brent Bos, Joseph Howard, Philip Young, Renee Gracey, Lenward Seals, Raymond Ohl

Proceedings Volume 8442, 84423I (2012) https://doi.org/10.1117/12.926365

KEYWORDS: Optical alignment, James Webb Space Telescope, Optimization (mathematics), Optical components, Instrument modeling, Ray tracing, Chemical elements, Geometrical optics, Mirrors, Interfaces

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Showing 5 of 13 publications

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