Dr. Guangjun Gao Profile

Dr. Guangjun Gao

at NASA Goddard Space Flight Ctr

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 24 August 2024 Presentation

Optical modeling activities for NASA’s Roman Space Telescope: II. Integrated modeling updates, correlations, and predictions

Joseph Howard, Kong Ha, Carson McDonald, Martina Atanassova, Guangjun Gao, Matthew Bolcar, Alice Liu, Michael Akkerman, Gregory Michels

Proceedings Volume 13099, 1309911 (2024) https://doi.org/10.1117/12.3021801

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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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SPIE Journal Paper | 8 February 2024

Spectral characterization of the Grism and Prism slitless spectrometers for the Nancy Grace Roman Space Telescope

Evan Bray, Mateo Batkis, Victor J. Chambers, Margaret Dominguez, Bente Eegholm, Guangjun Gao, Qian Gong, Wesley Halliday, Elias Howe, Jeffrey Kruk, Eliot Malumuth, Sangeeta Malhotra, Catherine Marx, James Rhoads, Maxime Rizzo, Joshua E. Schlieder, Laurie Seide, Eric R. Switzer, Jay Voris

JATIS, Vol. 10, Issue 01, 014003, (February 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.1.014003

KEYWORDS: Prisms, Cameras, Linear filtering, Point spread functions, Polarization, Optical fabrication, Diffraction, Sensors, Spectral models, Diffraction gratings

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Proceedings Article | 6 October 2023 Presentation

RST CGI: final verification and calibration of prism and polarizer flight units

Tyler Groff, Neil Zimmerman, Hari Subedi, John Titus, Dylan Bell, Guangjun Gao, Samuel Gaylin, Nicholas Nicolaeff, Toru Yamada, Motohide Tamura

Proceedings Volume 12680, 126800W (2023) https://doi.org/10.1117/12.2677576

KEYWORDS: Prisms, Calibration, Polarizers, Polarization, Spectroscopes, Spectral resolution, Equipment, Target detection, Space telescopes, Signal to noise ratio

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Proceedings Article | 4 October 2023 Presentation + Paper

The Roman Space Telescope optical system: status, test, and verification

Matthew Bolcar, Josh Abel, Lisa Bartusek, Tom Casey, Bente Eegholm, Guangjun Gao, Tyler Groff, John Hagopian, Joseph Howard, Alden Jurling, Gary Kuan, Dave Kubalak, Kuo-Chia (Alice) Liu, Cathy Marx, Kim Mehalick, Mark Melton, Scott Rohrbach, Derek Sabatke, Tony Whitman

Proceedings Volume 12676, 126760O (2023) https://doi.org/10.1117/12.2677569

KEYWORDS: Mirrors, Equipment, Vacuum, Optical alignment, Stray light, Optical fabrication, Metrology, Tunable filters, Telescopes, Space telescopes

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Proceedings Article | 29 August 2022 Poster

Prism assembly for Roman Space Telescope Wide Field Instrument slit-less spectroscopy

Bente Eegholm, Catherine Marx, Victor Chambers, Jenny Chu, Jay Voris, Guangjun Gao, John Lehan, Laurie Seide, Bert Pasquale, John Hagopian, Peter Morey, Qian Gong, Evan Bray

Proceedings Volume 12180, 121804X (2022) https://doi.org/10.1117/12.2633674

KEYWORDS: Prisms, Space telescopes, Spectroscopes, Field spectroscopy, Spectral resolution, Optical components, Mirrors, Telescopes, Spectroscopy, Optical instrument design

Proceedings Article | 7 January 2021 Poster + Paper

Roman Space Telescope CGI: prism and polarizer characterization modes

Tyler Groff, Neil Zimmerman, Hari Subedi, Maxime Rizzo, John Titus, Jim Lyons, Dylan Bell, Samuel Gaylin, Guangjun Gao, Bert Pasquale, Nicholas Nicolaeff, Motohide Tamura, Fang Shi

Proceedings Volume 11443, 114433D (2021) https://doi.org/10.1117/12.2562925

KEYWORDS: Prisms, Polarizers, Polarization, Spectral calibration, Spectroscopes, Planets, Spectral resolution, Optical design, Calibration, Coronagraphy

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Proceedings Article | 20 August 2020 Presentation + Paper

Alignment and verification testing of the GPS LRA test bed

Patricia Lyons, James Lyons, Peter Dogoda, Jim. Golder, Don Lindler, Stephen Merkowitz, Evan Hoffman, David Steinfeld, John Crow, Guangjun Gao, Ken Dymond

Proceedings Volume 11488, 114880I (2020) https://doi.org/10.1117/12.2569160

KEYWORDS: Beam expanders, Optical benches, Mirrors, Global Positioning System, Optical alignment, Collimation

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Proceedings Article | 17 September 2018 Presentation + Paper

Optical design and predicted performance of the WFIRST phase-b imaging optics assembly and wide field instrument

Bert Pasquale, Thomas Casey, Catherine Marx, Guangjun Gao, Nerses Armani, David Content, John Hagopian, Alden Jurling, Clifton Jackson, Alice Liu, Art Whipple, Jacob Murray

Proceedings Volume 10745, 107450K (2018) https://doi.org/10.1117/12.2325859

KEYWORDS: Mirrors, Observatories, Optical design, Telescopes, Space operations, Staring arrays, Coronagraphy, Optical alignment, Finite element methods

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Proceedings Article | 10 July 2018 Presentation

The wide field infrared survey telescope (WFIRST) observatory: design formulation (phase-A) overview (Conference Presentation)

Thomas Casey, Nerses Armani, Wes Alexander, Lisa Bartusek, Carl Blaurock, David Braun, Alexander Carra, David Content, Yves Conturie, Christine Cottingham, Richard Demers, Michael Dipirro, Robert Effinger, Robert Egerman, Frank Forkl, Guangjun Gao, John Gygax, John Hagopian, Timothy Hahm, John Hawk, Gurnie Hobbs, Clifton Jackson, Alden Jurling, Brian Kern, Jeffrey Kruk, Xiaoyi Li, Kuo-chia Liu, Catherine Marx, Marzouk Marzouk, Carson McDonald, Seke Godo, Mark Melton, James Mondello, M. Charley Noecker, Bert Pasquale, Hume Peabody, Ilya Poberezhskiy, Cory Powell, Giulio Rosanova, John Ruffa, Jeffrey Smith, Hong Tang, Christopher Tolman, Arthur Whipple, Timothy Wilson, Melissa Vess, Perry Voyer

Proceedings Volume 10698, 106982C (2018) https://doi.org/10.1117/12.2313748

KEYWORDS: Infrared telescopes, Space telescopes, Observatories, Telescopes, Infrared radiation, Optical instrument design, Infrared imaging, Exoplanets, Imaging spectroscopy, Coronagraphy

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Proceedings Article | 27 November 2017 Paper

Optical design of the WFIRST Phase-A Integral Field Channel

Guangjun Gao, Bert Pasquale, Catherine Marx, Victor Chambers

Proceedings Volume 10590, 105901R (2017) https://doi.org/10.1117/12.2293038

KEYWORDS: Astronomical spectroscopy, Optical design, Astronomical imaging, Space telescopes, Aberration theory

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Proceedings Article | 27 November 2017 Paper

Optical design of the WFIRST Phase-A Wide Field Instrument

Bert Pasquale, Catherine Marx, Guangjun Gao, Nerses Armani, Thomas Casey

Proceedings Volume 10590, 105901Q (2017) https://doi.org/10.1117/12.2300295

KEYWORDS: Mirrors, Optical design, Telescopes, Space telescopes, Staring arrays, Optical components, Stray light, Bragg cells, Galactic astronomy, Observatories

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Proceedings Article | 22 August 2017 Presentation + Paper

Ground to on-orbit alignment study of the WFIRST wide-field channel and resulting changes in the telescope architecture

John Hagopian, Nerses Armani, Lisa Bartusek, Tom Casey, Dave Content, Yves Conturie, Guangjun Gao, Alden Jurling, Cathy Marx, Joe Marzouk, Bert Pasquale, J. Scott Smith, Hong Tang, Arthur Whipple

Proceedings Volume 10377, 103770E (2017) https://doi.org/10.1117/12.2280333

KEYWORDS: Space telescopes, Telescopes, Mirrors, Infrared telescopes, Space operations, Optical telescopes, Coronagraphy, Monte Carlo methods, Infrared astronomy, Infrared radiation

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Proceedings Article | 13 March 2013 Paper

A virtual size-variable pinhole for single photon confocal microscopy

Guangjun Gao, Bahram Khoobehi

Proceedings Volume 8573, 85730A (2013) https://doi.org/10.1117/12.2000240

KEYWORDS: Confocal microscopy, Zoom lenses, Surface plasmons, Imaging systems, Sensors, Single photon, Interference (communication), Signal detection, Objectives, Relays

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Proceedings Article | 11 February 2011 Paper

High-speed focal modulation microscopy using acousto-optical modulators for visualization of thick biological specimens

Shau Poh Chong, Guangjun Gao, Colin J. Sheppard, Nanguang Chen

Proceedings Volume 7904, 79040C (2011) https://doi.org/10.1117/12.873996

KEYWORDS: Luminescence, Modulation, Microscopy, Confocal microscopy, Image quality, Bragg cells, Curium, Visualization, Modulators, Tissues

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SPIE Journal Paper | 1 September 2010

Spatially resolved height response of phase-shifting interferometers measured using a patterned mirror with varying spatial frequency

Jiyoung Chu, Quandou Wang, John Lehan, Guangjun Gao, Ulf Griesmann

OE, Vol. 49, Issue 09, 095601, (September 2010) https://doi.org/10.1117/12.10.1117/1.3488052

KEYWORDS: Interferometers, Mirrors, Spatial frequencies, Phase shifts, Sensors, Imaging systems, Optical engineering, Charge-coupled devices, Image resolution, Standards development

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Proceedings Article | 17 June 2009 Paper

Dual-CGH interferometry test for x-ray mirror mandrels

Guangjun Gao, John Lehan, Ulf Griesmann

Proceedings Volume 7389, 73891B (2009) https://doi.org/10.1117/12.830659

KEYWORDS: Computer generated holography, Mirrors, Metrology, X-rays, Interferometry, Spherical lenses, Interferometers, X-ray telescopes, Optical fabrication, Space telescopes

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SPIE Journal Paper | 1 June 2009

Computer-generated hologram cavity interferometry test for large x-ray mirror mandrels: design

Guangjun Gao, John Lehan, William Zhang, Ulf Griesmann, Johannes Soons

OE, Vol. 48, Issue 06, 063602, (June 2009) https://doi.org/10.1117/12.10.1117/1.3153303

KEYWORDS: Computer generated holography, Interferometers, Mirrors, Interferometry, Metrology, X-rays, Wavefronts, Optical engineering, Polarization, Optical design

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Proceedings Article | 11 August 2008 Paper

Measuring the phase transfer function of a phase-shifting interferometer

Jiyoung Chu, Quandou Wang, John Lehan, Guangjun Gao, Ulf Griesmann

Proceedings Volume 7064, 70640C (2008) https://doi.org/10.1117/12.795243

KEYWORDS: Spatial frequencies, Interferometers, Mirrors, Silica, Imaging systems, Chromium, Phase shifts, Modulation transfer functions, Photoresist materials, Lithography

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Proceedings Article | 10 February 2005 Paper

Design of aspherical metal mirrors used in infrared thermal imaging systems

Yinhua Cao, Lin Li, Guangjun Gao, Ying Zhang

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.573365

KEYWORDS: Mirrors, Thermography, Metals, Infrared radiation, Infrared imaging, Imaging systems, Temperature metrology, Optical design, Aluminum, Optical mounts

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Proceedings Article | 10 February 2005 Paper

Polarization aberration in resource satellite system

Ying Zhang, Lin Li, Yifan Huang, Guangjun Gao, Yinhua Cao

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.572519

KEYWORDS: Polarization, Satellites, Reflectors, Imaging systems, Reflectivity, Ray tracing, Polarization analysis, Optical design, Optical coatings, Thin films

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Proceedings Article | 10 February 2005 Paper

Using spherical aberrations of a singlet lens to get a uniform LED illumination

Guangjun Gao, Lin Li, Yifan Huang

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.571577

KEYWORDS: Monochromatic aberrations, Light emitting diodes, LED lighting, Lens design, Zemax, Computer simulations, Optical design software, Imaging systems, Modulation, Glasses

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Proceedings Article | 23 December 2002 Paper

Design of a complex optical system for measuring vibrant track of cable crossing river

Guangjun Gao, Lin Li, Yifan Huang, Liansheng An, Yongtian Wang

Proceedings Volume 4832, (2002) https://doi.org/10.1117/12.486434

KEYWORDS: Distortion, Optical tracking, Modulation transfer functions, Optical design, Charge-coupled devices, CCD image sensors, Tolerancing, Systems modeling, Zinc, Lithium

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Showing 5 of 23 publications

Conference Committee Involvement (1)

Roland V. Shack Memorial Session: A Celebration of One of the Great Teachers of Optical Aberration Theory

24 August 2020 | Online Only, California, United States

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