Dr. David C. Redding Profile

Dr. David C. Redding

Research Fellow at Jet Propulsion Lab

SPIE Involvement:

Conference Program Committee | Author

Publications (103)

Proceedings Article | 5 October 2023 Presentation + Paper

Integrated active control of coronagraph and telescope for high contrast imaging

David Redding, Erkin Sidick, John Lou, Brandon Dube, Scott Basinger

Proceedings Volume 12680, 126801M (2023) https://doi.org/10.1117/12.2678150

KEYWORDS: Coronagraphy, Telescopes, Sensors, Electric fields, Wavefront sensors, Equipment, Stars, Metrology, Laser metrology, Wavefront errors

Read Abstract +

SPIE Journal Paper | 8 December 2022 Open Access

Next-generation active telescope for space astronomy

Stefan Martin, Charles Lawrence, David Redding, Bertrand Mennesson, John Rodgers, Kevin Hurd, Rhonda Morgan, Renyu Hu, John Steeves, Jeffrey Jewell, Charles Phillips, Claudia Pineda, Ned Ferraro, Thibault L. Flinois

JATIS, Vol. 8, Issue 04, 044005, (December 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.4.044005

KEYWORDS: Telescopes, Space telescopes, Equipment, Mirrors, Astronomical telescopes, Astronomy, Exoplanets, Planets, Coronagraphy, Stars

Read Abstract +

We present a design for an active telescope for space astronomy. The telescope is capable of both exoplanet work and general astronomy over wavelengths from ∼100 nm up to 5 μm. The primary mirror is 6 m in diameter, formed by 16 mirror segments that are precisely phased and supported on rigid body actuators and with segment optical surface figures fine-tuned using surface figure actuators. The active primary forms a large deformable mirror (DM) with wavefront error (WFE) correction at the entrance pupil. Thus the largest source of WFE can be removed at the source and is corrected over the entire field of view. This enables diffraction-limited performance at 400 nm and a more efficient optical system over a broader wavelength range than could be achieved by a small DM at a downstream relayed pupil. The telescope is passively cooled to below 100 K at Sun–Earth L2, enabling astronomical-background-limited observations out to 5 μm. Launched on a SpaceX Starship or alternatively National Aeronautics and Space Administration’s Space Launch System, the telescope requires minimal deployments. A 72-m-diameter starshade provides a contrast ratio better than 10 − 10 for exoplanet science. Near the visible region, with a 108% working bandwidth from 300 to 1000 nm, a working distance of 120 Mm provides a 51-mas inner working angle (IWA). This band can be moved to shorter or longer wavelengths by adjusting the starshade range from the telescope. Our first-ever thermal analysis of such a starshade shows that a temperature below 100 K can be achieved over a broad range of observing directions, permitting the possibility of working into the infrared. We model the yield in exoplanets that can be observed. A starshade and associated spectrograph offer significant advantages for exoplanet characterization. They enable a much broader instantaneous spectral bandwidth (here 108%) than current coronagraphs (∼10 % to 20% bandwidth), allow both polarizations to be observed simultaneously, and have higher throughput. The IWA is twice as small as can be achieved with a coronagraph and there is no outer working angle. These differences are particularly pronounced in the UV, where coronagraph performance would be strongly affected by throughput losses, wavefront aberrations, Fresnel polarization effects at surfaces, and thermal instability.

DOWNLOAD PAPER

SPIE Journal Paper | 23 September 2022 Open Access

Adaptive optics performance of a simulated coronagraph instrument on a large, segmented space telescope in steady state

Axel Potier, Garreth Ruane, Chris Stark, Pin Chen, Ankur Chopra, Larry Dewell, Roser Juanola-Parramon, Alison Nordt, Laurent Pueyo, David Redding, A J Eldorado Riggs, Dan Sirbu

JATIS, Vol. 8, Issue 03, 035002, (September 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.3.035002

KEYWORDS: Adaptive optics, Coronagraphy, Telescopes, Wavefronts, Stars, Device simulation, Wavefront sensors, Equipment, Optical path differences, Wavefront errors

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 27 August 2022 Poster + Paper

Contrast performance of an 8m off-axis, segmented space telescope equipped with an adaptive optics system

Axel Potier, Garreth Ruane, Kiarash Tajdaran, Chris Stark, Pin Chen, Larry Dewell, Roser Juanola-Parramon, Alison Nordt, Laurent Pueyo, A.J. Eldorado Riggs, David Redding, Dan Sirbu

Proceedings Volume 12180, 121805D (2022) https://doi.org/10.1117/12.2629902

KEYWORDS: Coronagraphy, Adaptive optics, Telescopes, Stars, Image segmentation, Wavefront sensors, Space telescopes, Performance modeling, Wavefronts, Mirrors

Read Abstract +

Proceedings Article | 25 August 2022 Presentation + Paper

NASA intentional technology development

Mario Perez, H. Philip Stahl, Lee Feinberg, David Redding

Proceedings Volume 12187, 121870O (2022) https://doi.org/10.1117/12.2630381

KEYWORDS: Technology, Mirrors, Astrophysics, Space operations, James Webb Space Telescope, Beryllium, Aerospace engineering, Systems engineering, Telescopes, Cryogenics, Space telescopes

Read Abstract +

Proceedings Article | 3 September 2021 Presentation + Paper

LUVOIR-ECLIPS closed-loop adaptive optics performance and contrast predictions

Axel Potier, Garreth Ruane, Pin Chen, Ankur Chopra, Larry Dewell, Roser Juanola Parramon, Alison Nordt, Laurent Pueyo, David Redding, AJ Eldorado Riggs, Dan Sirbu

Proceedings Volume 11823, 118231L (2021) https://doi.org/10.1117/12.2595116

KEYWORDS: Adaptive optics, Wavefronts, Wavefront sensors, Telescopes, Principal component analysis, Coronagraphy, Exoplanets

Read Abstract +

SPIE Journal Paper | 26 August 2021 Open Access

Galaxy Evolution Probe

Jason Glenn, Charles Bradford, Erik Rosolowsky, Rashied Amini, Katherine Alatalo, Lee Armus, Andrew Benson, Tzu-Ching Chang, Jeremy Darling, Peter Day, Jeanette Domber, Duncan Farrah, Brandon Hensley, Sarah Lipscy, Bradley Moore, Sebastian Oliver, Joanna Perido, David Redding, John Rodgers, Raphael Shirley, Howard Smith, John Steeves, Carole Tucker, Jonas Zmuidzinas

JATIS, Vol. 7, Issue 03, 034004, (August 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.3.034004

KEYWORDS: Galactic astronomy, Galaxy evolution, Stars, Spectroscopy, Sensors, Mid-IR, Mirrors, Telescopes, Infrared radiation, Electronics

Read Abstract +

DOWNLOAD PAPER

SPIE Journal Paper | 13 March 2021 Open Access

Origins Space Telescope: trades and decisions leading to the baseline mission concept

David Leisawitz, Edward Amatucci, Lynn Allen, Jonathan Arenberg, Lee Armus, Cara Battersby, James Bauer, Ray Bell, Dominic Benford, Edwin Bergin, Jeffrey Booth, Charles Bradford, Damon Bradley, Sean Carey, Ruth Carter, Asantha Cooray, James Corsetti, Larry Dewell, Michael DiPirro, Bret Drake, Matthew East, Kimberly Ennico, Greg Feller, Angel Flores, Jonathan Fortney, Zachary Granger, Thomas Greene, Joseph Howard, Tiffany Kataria, John Knight, Charles Lawrence, Paul Lightsey, John Mather, Margaret Meixner, Gary Melnick, Craig McMurtry, Stefanie Milam, Samuel Moseley, Desika Narayanan, Alison Nordt, Deborah Padgett, Klaus Pontoppidan, Alexandra Pope, Gerard Rafanelli, David Redding, George Rieke, Thomas Roellig, Itsuki Sakon, Carly Sandin, Karin Sandstrom, Anita Sengupta, Kartik Sheth, Lawrence Sokolsky, Johannes Staguhn, John Steeves, Kevin Stevenson, Kate Su, Joaquin Vieira, Cassandra Webster, Martina Wiedner, Edward Wright, Chi Wu, David Yanatsis, Jonas Zmuidzinas, the Origins Space Telescope Mission Concept Study Team

JATIS, Vol. 7, Issue 01, 011014, (March 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.1.011014

KEYWORDS: Space telescopes, Telescopes, James Webb Space Telescope, Mirrors, Optical instrument design, Astronomy, Space operations, Cryogenics, Aerospace engineering, Cryocoolers

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 13 December 2020 Poster

Active telescope for UV-through-midIR space astronomy

Charles Lawrence, David Redding, Kevin Hurd, Jeffrey Jewell, Stefan Martin, Rhonda Morgan, Charles Phillips, Claudia Pineda, Michael Rodgers, John Steeves

Proceedings Volume 11443, 114435Z (2020) https://doi.org/10.1117/12.2563177

KEYWORDS: Space telescopes, Telescopes, Astronomy, Astronomical telescopes, Exoplanets, Imaging spectroscopy, Ultraviolet radiation, Visible radiation, Mid-IR, Optics manufacturing

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

ATSA: a cold, active telescope for Space Astronomy

Stefan Martin, Charles Lawrence, David Redding, Michael Rodgers, Kevin Hurd, Jeffrey Jewell, Rhonda Morgan, Charles Phillips, Claudia Pineda, Bertrand Mennesson, John Steeves

Proceedings Volume 11443, 114432A (2020) https://doi.org/10.1117/12.2575505

Read Abstract +

SPIE Journal Paper | 9 November 2020

Wavefront sensing and control in space-based coronagraph instruments using Zernike’s phase-contrast method

Garreth Ruane, James Kent Wallace, John Steeves, Camilo Mejia Prada, Byoung-Joon Seo, Eduardo Bendek, Carl Coker, Pin Chen, Brendan Crill, Jeff Jewell, Brian Kern, David Marx, Phillip Poon, David Redding, A. J. Eldorado Riggs, Nicholas Siegler, Robert Zimmer

JATIS, Vol. 6, Issue 04, 045005, (November 2020) https://doi.org/10.1117/12.10.1117/1.JATIS.6.4.045005

KEYWORDS: Coronagraphy, Wavefronts, Stars, Actuators, Wavefront sensors, Space telescopes, Cameras, Equipment, Wavefront errors, Wavefront aberrations

Read Abstract +

Proceedings Article | 9 September 2019 Presentation + Paper

A Habitable Exoplanet Observatory (HabEx) starshade-only architectures

David Redding, Keith Coste, Otto Polanco, Claudia Pineda, Kevin Hurd, Howard Tseng, Stefan Martin, Rhonda Morgan, Kevin Schulz, Jonathan Tesch, Eric Cady, Michael Rodgers, Matthew East, Chris Stark, Gordon Wu, Pei Huang, Bradley Hood, Derek Chan, Dustin Putnam, Suzan Greene, Sandra Johnson, Jonathan Benson

Proceedings Volume 11115, 111150V (2019) https://doi.org/10.1117/12.2529646

KEYWORDS: Telescopes, Ultraviolet radiation, Mirrors, Space operations, Interfaces, Actuators, Exoplanets, Electronics, Imaging spectroscopy, Observatories

Read Abstract +

Proceedings Article | 9 September 2019 Presentation + Paper

The LUVOIR Extreme Coronagraph for Living Planetary Systems (ECLIPS) I: searching and characterizing exoplanetary gems

L. Pueyo, C. Stark, R. Juanola-Parramon, N. Zimmerman, M. Bolcar, A. Roberge, G. Arney, G. Ruane, A. Riggs, R. Belikov, D. Sirbu, D. Redding, R. Soummer, I. Laginja, S. Will

Proceedings Volume 11117, 1111703 (2019) https://doi.org/10.1117/12.2530722

KEYWORDS: Coronagraphy, Exoplanets, Astrophysics, Planets, Stars, Imaging systems, Planetary systems, Cameras, Wavefront sensors, Observatories

Read Abstract +

Proceedings Article | 26 July 2018 Paper

A simple, dual knife-edge test for phasing segmented aperture space telescopes

Shannon Kian Zareh, J. Kent Wallace, Frank Loya, David Redding

Proceedings Volume 10706, 107064Q (2018) https://doi.org/10.1117/12.2314191

KEYWORDS: Point spread functions, Mirrors, Image segmentation, Space telescopes, Telescopes, James Webb Space Telescope, Optical testing, Deformable mirrors, Wavefronts, Sensors

Read Abstract +

Proceedings Article | 24 July 2018 Presentation + Paper

The Galaxy Evolution Probe: a concept for a mid and far-infrared space observatory

Jason Glenn, C. Matt Bradford, Rashied Amini, Bradley Moore, Andrew Benson, Lee Armus, Katherine Alatalo, Jeremy Darling, Peter Day, Jeanette Domber, Duncan Farrah, Adalyn Fyhrie, Brandon Hensley, Sarah Lipscy, David Redding, Michael Rogers, Mark Shannon, John Steeves, Carole Tucker, Gordon Wu, Jonas Zmuidzinas

Proceedings Volume 10698, 106980L (2018) https://doi.org/10.1117/12.2314076

KEYWORDS: Galactic astronomy, Spectroscopy, Mirrors, Imaging systems, Sensors, Stars, Telescopes, Space telescopes, Galaxy evolution, Staring arrays

Read Abstract +

Proceedings Article | 24 July 2018 Paper

Mirror design study for a segmented HabEx system

James Mooney, Matthew East, Bruce Rottner, Chistopher Sullivan, David Wideman, David Redding, Kevin Schulz

Proceedings Volume 10698, 106983I (2018) https://doi.org/10.1117/12.2314279

KEYWORDS: Mirrors, Space telescopes, Telescopes, Manufacturing

Read Abstract +

Proceedings Article | 10 July 2018 Paper

Active mirrors for future space telescopes

John Steeves, David Redding, James Wallace, Charles Lawrence, Todd Gaier, Randall Bartman, Raef Mikhail, Jeff Cavaco, John Vayda

Proceedings Volume 10706, 1070615 (2018) https://doi.org/10.1117/12.2312645

KEYWORDS: Mirrors, Actuators, Cryogenics, Silicon carbide, Space telescopes, Telescopes

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Picometer differential wavefront metrology by nonlinear Zernike wavefront sensing for LUVOIR

Dustin Moore, David Redding

Proceedings Volume 10698, 1069841 (2018) https://doi.org/10.1117/12.2312600

KEYWORDS: Phase contrast, Coronagraphy, Data modeling, Phase retrieval, Point spread functions

Read Abstract +

Proceedings Article | 6 July 2018 Paper

LUVOIR primary mirror segment alignment control with joint laser metrology and segment edge sensing

John Lou, David Redding, Joel Nissen, Chris Shelton

Proceedings Volume 10698, 1069840 (2018) https://doi.org/10.1117/12.2311495

KEYWORDS: Wavefronts, Sensors, Metrology, Wavefront sensors, Mirrors, Error analysis, Laser metrology, Image segmentation, Control systems, Monte Carlo methods

Read Abstract +

Proceedings Article | 6 July 2018 Presentation + Paper

Picometer level stability of a mounted mirror assembly

Matthew East, David Redding, Chistopher Sullivan, Ted Mooney, Lynn Allen

Proceedings Volume 10698, 106980Y (2018) https://doi.org/10.1117/12.2314332

KEYWORDS: Mirrors, Adhesives, Wavefronts, 3D modeling, Control systems, Systems modeling, Thermal modeling, Temperature metrology, Coronagraphy, Metrology

Read Abstract +

Proceedings Article | 6 July 2018 Presentation + Paper

HabEx Lite: a starshade-only habitable exoplanet imager alternative

David Redding, Keith Coste, Otto Polanco, Claudia Pineda, Kevin Hurd, Howard Tseng, Jose Quezada, Stefan Martin, Joel Nissen, Kevin Schulz, Jonathan Tesch, Eric Cady, Michael Rodgers, Matthew East, James Mooney, Chris Stark

Proceedings Volume 10698, 106980X (2018) https://doi.org/10.1117/12.2310058

KEYWORDS: Mirrors, Coronagraphy, Space telescopes, Imaging spectroscopy, Telescopes, Ultraviolet radiation, Exoplanets, Control systems, Observatories, Planets

Read Abstract +

Proceedings Article | 13 September 2017 Presentation + Paper

The LUVOIR architecture "A" coronagraph instrument

L. Pueyo, N. Zimmerman, M. Bolcar, T. Groff, C. Stark, G. Ruane, J. Jewell, R. Soummer, K. St. Laurent, J. Wang, D. Redding, J. Mazoyer, K. Fogarty, Roser Juanola-Parramon, S. Domagal-Goldman, A. Roberge, O. Guyon, A. Mandell

Proceedings Volume 10398, 103980F (2017) https://doi.org/10.1117/12.2274654

KEYWORDS: Coronagraphy, Wavefronts, Sensors, Planets, Channel projecting optics, Wavefront sensors, Stars, Imaging systems, Mirrors, Telescopes

Read Abstract +

In preparation for the Astro 2020 Decadal Survey NASA has commissioned the study four flagship missions spanning to a wide range of observable wavelengths: the Origins Space Telescope (OST, formerly the Far-Infrared Surveyor), Lynx (formerly the X-ray Surveyor), the Large UV/Optical/Infrared Surveyor (LUVOIR) and the Habitable Exoplanet Imager (HabEx). One of the key scientific objectives of the latter two is the detection and characterization of the earth-like planets around nearby stars using the direct imaging technique (along with a broad range of investigations regarding the architecture of and atmospheric composition exoplanetary systems using this technique). As a consequence dedicated exoplanet instruments are being studied for these mission concepts. This paper discusses the design of the coronagraph instrument for the architecture “A” (15 meters aperture) of LUVOIR. The material presented in this paper is aimed at providing an overview of the LUVOIR coronagraph instrument. It is the result of four months of discussions with various community stakeholders (scientists and technologists) regarding the instrument’s basic parameters followed by meticulous design work by the the GSFC Instrument Design Laboratory team. In the first section we review the main science drivers, presents the overall parameters of the instrument (general architecture and backend instrument) and delve into the details of the currently envisioned coronagraph masks along with a description of the wavefront control architecture. Throughout the manuscript we describe the trades we made during the design process. Because the vocation of this study is to provide a baseline design for the most ambitious earth-like finding instrument that could be possibly launched into the 2030’s, we have designed an complex system privileged that meets the ambitious science goals out team was chartered by the LUVOIR STDT exoplanet Working Group. However in an effort to minimize technological risk we tried to maximize the number of technologies that will be matured by the WFIRST coronagraph instruments.

Proceedings Article | 13 September 2017 Presentation + Paper

Optimization of coronagraph design for segmented aperture telescopes

Jeffrey Jewell, Garreth Ruane, Stuart Shaklan, Dimitri Mawet, Dave Redding

Proceedings Volume 10400, 104000H (2017) https://doi.org/10.1117/12.2274574

KEYWORDS: Coronagraphy, Optimization (mathematics), Telescopes, Expectation maximization algorithms, Optical instrument design, Space telescopes, Deformable mirrors, Planets, Image segmentation, Apodization

Read Abstract +

The goal of directly imaging Earth-like planets in the habitable zone of other stars has motivated the design of coronagraphs for use with large segmented aperture space telescopes. In order to achieve an optimal trade-off between planet light throughput and diffracted starlight suppression, we consider coronagraphs comprised of a stage of phase control implemented with deformable mirrors (or other optical elements), pupil plane apodization masks (gray scale or complex valued), and focal plane masks (either amplitude only or complex-valued, including phase only such as the vector vortex coronagraph). The optimization of these optical elements, with the goal of achieving 10 or more orders of magnitude in the suppression of on-axis (starlight) diffracted light, represents a challenging non-convex optimization problem with a nonlinear dependence on control degrees of freedom. We develop a new algorithmic approach to the design optimization problem, which we call the ”Auxiliary Field Optimization” (AFO) algorithm. The central idea of the algorithm is to embed the original optimization problem, for either phase or amplitude (apodization) in various planes of the coronagraph, into a problem containing additional degrees of freedom, specifically fictitious ”auxiliary” electric fields which serve as targets to inform the variation of our phase or amplitude parameters leading to good feasible designs. We present the algorithm, discuss details of its numerical implementation, and prove convergence to local minima of the objective function (here taken to be the intensity of the on-axis source in a ”dark hole” region in the science focal plane). Finally, we present results showing application of the algorithm to both unobscured off-axis and obscured on-axis segmented telescope aperture designs. The application of the AFO algorithm to the coronagraph design problem has produced solutions which are capable of directly imaging planets in the habitable zone, provided end-to-end telescope system stability requirements can be met. Ongoing work includes advances of the AFO algorithm reported here to design in additional robustness to a resolved star, and other phase or amplitude aberrations to be encountered in a real segmented aperture space telescope.

Proceedings Article | 5 September 2017 Presentation + Paper

Ultra-stable segmented telescope sensing and control architecture

Lee Feinberg, Matthew Bolcar, Scott Knight, David Redding

Proceedings Volume 10398, 103980E (2017) https://doi.org/10.1117/12.2272810

KEYWORDS: Space telescopes, Telescopes, Infrared telescopes, Ultraviolet radiation, UV optics, Infrared radiation, Optical instrument design, Space observatories

Read Abstract +

Proceedings Article | 5 September 2017 Presentation + Paper

LUVOIR backplane thermal architecture development through the composite CTE sensitivity study

Sang Park, Michael Eisenhower, Marcel Bluth, Matthew Bolcar, Lee Feinberg, J. Scott Knight, David Redding

Proceedings Volume 10398, 103980D (2017) https://doi.org/10.1117/12.2274632

KEYWORDS: Composites, Mirrors, Distortion, Wavefronts, Mirror structures, James Webb Space Telescope, Optical telescopes, Image segmentation, Finite element methods

Read Abstract +

SPIE Journal Paper | 15 September 2016

Future large-aperture UVOIR space observatory: reference designs

Norman Rioux, Harley Andrew Thronson, Lee Feinberg, H. Philip Stahl, David Redding, Andrew Jones, James Sturm, Christine Collins, Alice Kuochia Liu, Matthew Bolcar

JATIS, Vol. 2, Issue 04, 041214, (September 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.4.041214

KEYWORDS: Mirrors, Space telescopes, Telescopes, Coronagraphy, Optical instrument design, Exoplanets, Observatories, Space observatories, Laser sintering, Stars

Read Abstract +

Proceedings Article | 18 August 2016 Paper

Optical error budgeting using linearized ray-trace models

D. Redding

Proceedings Volume 9911, 99110F (2016) https://doi.org/10.1117/12.2234484

KEYWORDS: Error analysis, Wavefronts, Control systems, Space telescopes, Phase modulation, Actuators, Received signal strength, Telescopes, Staring arrays, Geometrical optics

Read Abstract +

Proceedings Article | 29 July 2016 Paper

Initial technology assessment for the Large-Aperture UV-Optical-Infrared (LUVOIR) mission concept study

Matthew Bolcar, Lee Feinberg, Kevin France, Bernard Rauscher, David Redding, David Schiminovich

Proceedings Volume 9904, 99040J (2016) https://doi.org/10.1117/12.2230769

KEYWORDS: Space telescopes, Wavefronts, Exoplanets, Mirrors, Coronagraphy, Sensors, Telescopes, Electron multiplying charge coupled devices, Microchannel plates, Control systems

Read Abstract +

Proceedings Article | 22 July 2016 Paper

Multilayer active shell mirrors for space telescopes

John Steeves, Kathryn Jackson, Sergio Pellegrino, David Redding, J. Kent Wallace, Samuel Case Bradford, Troy Barbee

Proceedings Volume 9912, 99121K (2016) https://doi.org/10.1117/12.2233594

KEYWORDS: Mirrors, Disk lasers, Space telescopes, Electrodes, Optics manufacturing, Actuators, Prototyping, Manufacturing, Telescopes, Epoxies

Read Abstract +

SPIE Journal Paper | 8 July 2016

Technology gap assessment for a future large-aperture ultraviolet-optical-infrared space telescope

Matthew Bolcar, Kunjithapatham Balasubramanian, Julie Crooke, Lee Feinberg, Manuel Quijada, Bernard Rauscher, David Redding, Norman Rioux, Stuart Shaklan, H. Philip Stahl, Carl Stahle, Harley Thronson

JATIS, Vol. 2, Issue 04, 041209, (July 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.4.041209

KEYWORDS: Space telescopes, Coronagraphy, Mirrors, Telescopes, Wavefronts, Sensors, Control systems, Exoplanets, Astrophysics, Actuators

Read Abstract +

Proceedings Article | 22 September 2015 Paper

A future large-aperture UVOIR space observatory: reference designs

Norman Rioux, Harley Thronson, Lee Feinberg, H. Philip Stahl, Dave Redding, Andrew Jones, James Sturm, Christine Collins, Alice Liu

Proceedings Volume 9602, 960205 (2015) https://doi.org/10.1117/12.2187758

KEYWORDS: Mirrors, Space telescopes, Telescopes, Observatories, Coronagraphy, Exoplanets, Laser sintering, Objectives, Computer aided design, Stars

Read Abstract +

Proceedings Article | 22 September 2015 Paper

Technology development for the Advanced Technology Large Aperture Space Telescope (ATLAST) as a candidate large UV-Optical-Infrared (LUVOIR) surveyor

Matthew Bolcar, Kunjithapatham Balasubramanian, Mark Clampin, Julie Crooke, Lee Feinberg, Marc Postman, Manuel Quijada, Bernard Rauscher, David Redding, Norman Rioux, Stuart Shaklan, H. Philip Stahl, Carl Stahle, Harley Thronson

Proceedings Volume 9602, 960209 (2015) https://doi.org/10.1117/12.2188559

KEYWORDS: Space telescopes, Coronagraphy, Telescopes, Exoplanets, Mirrors, Wavefronts, Sensors, Control systems, James Webb Space Telescope, Manufacturing

Read Abstract +

Proceedings Article | 2 August 2014 Paper

Beyond JWST: performance requirements for a future large UVOIR space telescope

David Redding, Lee Feinberg, Marc Postman, H. Philip Stahl, Carl Stahle, Harley Thronson

Proceedings Volume 9143, 914312 (2014) https://doi.org/10.1117/12.2056568

KEYWORDS: Space telescopes, Telescopes, Stars, Wavefronts, Coronagraphy, James Webb Space Telescope, Mirrors, Planets, Imaging spectroscopy, Galactic astronomy

Read Abstract +

Proceedings Article | 2 August 2014 Paper

A cost-effective and serviceable ATLAST 9.2m telescope architecture

Lee Feinberg, Andrew Jones, Gary Mosier, Norman Rioux, Dave Redding, Mike Kienlen

Proceedings Volume 9143, 914316 (2014) https://doi.org/10.1117/12.2054915

KEYWORDS: James Webb Space Telescope, Mirrors, Telescopes, Space telescopes, Observatories, Rockets, Wavefronts, Space operations, Coronagraphy, Infrared telescopes

Read Abstract +

Proceedings Article | 28 July 2014 Paper

Design, fabrication and testing of active carbon shell mirrors for space telescope applications

John Steeves, Marie Laslandes, Sergio Pellegrino, David Redding, Samuel Case Bradford, James Kent Wallace, Troy Barbee

Proceedings Volume 9151, 915105 (2014) https://doi.org/10.1117/12.2056560

KEYWORDS: Mirrors, Electrodes, Prototyping, Carbon, Space telescopes, Metrology, Actuators, Photovoltaics, Space mirrors, Epoxies

Read Abstract +

Proceedings Article | 27 September 2012 Paper

The CCAT 25m diameter submillimeter-wave telescope

David Woody, Steve Padin, Eric Chauvin, Bruno Clavel, German Cortes, Andy Kissil, John Lou, Paul Rasmussen, David Redding, Jeff Zolkower

Proceedings Volume 8444, 84442M (2012) https://doi.org/10.1117/12.925229

KEYWORDS: Telescopes, Wavefronts, Sensors, Control systems, Actuators, Distortion, Cameras, Reflectors, Image segmentation, Mirrors

Read Abstract +

Proceedings Article | 13 September 2012 Paper

An imaging displacement sensor with nanometer accuracy

David Woody, David Redding

Proceedings Volume 8450, 84500U (2012) https://doi.org/10.1117/12.925231

KEYWORDS: Charge-coupled devices, Sensors, Collimators, Light emitting diodes, CCD cameras, Prototyping, Sun, Fourier transforms, Telescopes, Cameras

Read Abstract +

Proceedings Article | 10 November 2011 Paper

Model-based wavefront control for CCAT

David Redding, John Lou, Andy Kissil, Matt Bradford, Steve Padin, David Woody

Proceedings Volume 8336, 83360Q (2011) https://doi.org/10.1117/12.916694

KEYWORDS: Sensors, Telescopes, Error analysis, Wavefronts, Phase modulation, Actuators, Image segmentation, Mirrors, Motion measurement, Control systems

Read Abstract +

Proceedings Article | 11 August 2010 Paper

Modeling a large submillimeter-wave observatory

John Lou, Andy Kissil, Dave Redding, Matt Bradford, Steve Padin, David Woody

Proceedings Volume 7733, 773326 (2010) https://doi.org/10.1117/12.856493

KEYWORDS: Wavefronts, Image segmentation, Sensors, Wavefront sensors, Error analysis, Mirrors, Control systems, Telescopes, Actuators, Motion models

Read Abstract +

Proceedings Article | 6 August 2010 Paper

Actuated hybrid mirrors for space telescopes

Gregory Hickey, Troy Barbee, Mark Ealey, David Redding

Proceedings Volume 7731, 773120 (2010) https://doi.org/10.1117/12.858217

KEYWORDS: Space telescopes, Mirrors, Actuators, Telescopes, Active optics, Silicon carbide, Wavefront sensors, Optical fabrication, Zirconium, Magnesium

Read Abstract +

Proceedings Article | 5 August 2010 Paper

Wavefront controls for a large submillimeter-wave observatory

David Redding, John Lou, Andy Kissil, Matt Bradford, Steve Padin, David Woody

Proceedings Volume 7733, 773329 (2010) https://doi.org/10.1117/12.858097

KEYWORDS: Control systems, Error analysis, Telescopes, Sensors, Wavefronts, Actuators, Optical testing, Monte Carlo methods, Mirrors, Filtering (signal processing)

Read Abstract +

Proceedings Article | 23 July 2010 Paper

Phase retrieval methods for wavefront sensing

Siddarayappa Bikkannavar, David Redding, Joseph Green, Scott Basinger, David Cohen, John Lou, Catherine Ohara, Fang Shi

Proceedings Volume 7739, 77392X (2010) https://doi.org/10.1117/12.858980

KEYWORDS: Point spread functions, Phase retrieval, Magnesium, Wavefront sensors, Error analysis, Space telescopes, Spatial frequencies, Image processing, Wavefronts, High dynamic range imaging

Read Abstract +

Proceedings Article | 14 July 2008 Paper

An improved wavefront control algorithm for large space telescopes

Erkin Sidick, Scott Basinger, David Redding

Proceedings Volume 7015, 70154P (2008) https://doi.org/10.1117/12.786679

KEYWORDS: Actuators, Wavefronts, Space telescopes, Photovoltaics, James Webb Space Telescope, Telescopes, Tolerancing, Wavefront sensors, Matrices, Sensors

Read Abstract +

Proceedings Article | 12 July 2008 Paper

Telescope multi-field wavefront control with a Kalman filter

John Lou, David Redding, Norbert Sigrist, Scott Basigner

Proceedings Volume 7010, 701043 (2008) https://doi.org/10.1117/12.788198

KEYWORDS: Wavefronts, Telescopes, Space telescopes, Phase modulation, Error analysis, Optical alignment, Cameras, Mirrors, Control systems, Filtering (signal processing)

Read Abstract +

Proceedings Article | 20 September 2007 Paper

Adaptive cross-correlation algorithm and experiment of extended scene Shack-Hartmann wavefront sensing

Erkin Sidick, Rhonda Morgan, Joseph Green, Catherine Ohara, David Redding

Proceedings Volume 6687, 668710 (2007) https://doi.org/10.1117/12.735030

KEYWORDS: Wavefront sensors, Actuators, Cameras, Algorithm development, Wavefronts, Detection and tracking algorithms, Photovoltaics, Error analysis, Image analysis, Image quality

Read Abstract +

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

Read Abstract +

Proceedings Article | 10 June 2006 Paper

Performance of dispersed fringe sensor in the presence of segmented mirror aberrations: modeling and simulation

Fang Shi, Scott Basinger, David Redding

Proceedings Volume 6265, 62650Y (2006) https://doi.org/10.1117/12.672714

KEYWORDS: Wavefront aberrations, James Webb Space Telescope, Wavefronts, Point spread functions, Visibility, Image segmentation, Performance modeling, Sensors, Mirrors, Segmented mirrors

Read Abstract +

Proceedings Article | 20 October 2005 Paper

Optical system alignment via optical state estimation using wavefront measurements

Norbert Sigrist, David Redding, John Lou, Yan Zhang, Scott Basinger

Proceedings Volume 5965, 596524 (2005) https://doi.org/10.1117/12.630886

KEYWORDS: Wavefronts, Optical testing, James Webb Space Telescope, Optical alignment, Error analysis, Space telescopes, Phase modulation, Mirrors, Telescopes, Metrology

Read Abstract +

Proceedings Article | 15 September 2005 Paper

High contrast imaging with the JWST NIRCAM coronagraph

Joseph Green, Charles Beichman, Scott Basinger, Scott Horner, Michael Meyer, David Redding, Marcia Rieke, John Trauger

Proceedings Volume 5905, 59050L (2005) https://doi.org/10.1117/12.619343

KEYWORDS: James Webb Space Telescope, Stars, Coronagraphy, Telescopes, Space telescopes, Adaptive optics, Planets, Gemini Observatory, Calibration, Wavefronts

Read Abstract +

Proceedings Article | 24 August 2005 Paper

JWST on-orbit multi-field wavefront control with a Kalman filter

John Lou, David Redding, Norbert Sigrist, Yan Zhang, Scott Basinger

Proceedings Volume 5867, 58670T (2005) https://doi.org/10.1117/12.615383

KEYWORDS: James Webb Space Telescope, Wavefronts, Error analysis, Phase modulation, Optical alignment, Telescopes, Space telescopes, Filtering (signal processing), Monte Carlo methods, Control systems

Read Abstract +

Proceedings Article | 14 October 2004 Paper

Optical state estimation using wavefront data

David Redding, Norbert Sigrist, John Lou, Yan Zhang, Paul Atcheson, Daniel Acton, William Hayden

Proceedings Volume 5523, (2004) https://doi.org/10.1117/12.561142

KEYWORDS: Error analysis, James Webb Space Telescope, Wavefronts, Telescopes, Phase modulation, Space telescopes, Optical testing, Interferometers, Actuators, Monte Carlo methods

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Performance of segmented mirror coarse phasing with a dispersed fringe sensor: modeling and simulations

Fang Shi, David Redding, Joseph Green, Catherine Ohara

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552323

KEYWORDS: Visibility, Image segmentation, Point spread functions, James Webb Space Telescope, Diffraction, Sensors, Modulation, Wavefronts, Mirrors, Signal processing

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Target selection and imaging requirements for JWST fine phasing

Joseph Green, Bruce Dean, Catherine Ohara, David Redding, Yan Zhang

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552433

KEYWORDS: James Webb Space Telescope, Point spread functions, Mirrors, Error analysis, Image segmentation, Stars, Stochastic processes, Space telescopes, Monte Carlo methods, Sensors

Read Abstract +

Proceedings Article | 12 October 2004 Paper

James Webb Space Telescope wavefront sensing and control algorithms

Daniel Acton, Paul Atcheson, Mick Cermak, Lana Kingsbury, Fang Shi, David Redding

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551846

KEYWORDS: Image segmentation, James Webb Space Telescope, Wavefronts, Telescopes, Phase modulation, Mirrors, Space telescopes, Algorithm development, Wavefront sensors, Image processing

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Wavefront control testbed experimental results

Laura Burns, Scott Basinger, Scott Campion, Jessica Faust, Lee Feinberg, Joseph Green, William Hayden, Andrew Lowman, Catherine Ohara, Peter Petrone, David Redding, Fang Shi, David Van Buren, Barbara Zukowski

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551794

KEYWORDS: Image segmentation, Wavefronts, Mirrors, James Webb Space Telescope, Space telescopes, Visibility, Telescopes, Wavefront sensors, Phase retrieval, Device simulation

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Phase Retrieval Camera optical testing of the Advanced Mirror System Demonstrator (AMSD)

Catherine Ohara, Jessica Faust, Andrew Lowman, Joseph Green, David Redding, Scott Basinger, David Cohen, Fang Shi

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551793

KEYWORDS: Mirrors, James Webb Space Telescope, Magnesium, Wavefront sensors, Phase retrieval, Wavefronts, Iris, Point spread functions, Cameras, Optical testing

Read Abstract +

Proceedings Article | 30 September 2004 Paper

Terrestrial Planet Finder Coronagraph optical modeling

Scott Basinger, David Redding

Proceedings Volume 5528, (2004) https://doi.org/10.1117/12.560507

KEYWORDS: Near field optics, Coronagraphy, Systems modeling, Planets, Mirrors, Wavefronts, 3D modeling, Thermal modeling, Diffraction, Performance modeling

Read Abstract +

Proceedings Article | 28 September 2004 Paper

Experimental verification of dispersed fringe sensing as a segment-phasing technique using the Keck Telescope

Fang Shi, Catherine Ohara, Gary Chanan, Mitchell Troy, David Redding

Proceedings Volume 5489, (2004) https://doi.org/10.1117/12.552407

KEYWORDS: Telescopes, Space telescopes, James Webb Space Telescope, Visibility, Calibration, Sensors, Modulation, Mirrors, Diffraction, Image segmentation

Read Abstract +

Proceedings Article | 19 November 2003 Paper

Demonstration of extreme wavefront sensing performance on the TPF high-contrast imaging testbed

Joseph Green, Scott Basinger, David Cohen, Albert Niessner, David Redding, Stuart Shaklan, John Trauger

Proceedings Volume 5170, (2003) https://doi.org/10.1117/12.506513

KEYWORDS: Error analysis, Point spread functions, Wavefronts, Magnesium, Actuators, Wavefront sensors, Data modeling, Spatial frequencies, Coronagraphy, Near field optics

Read Abstract +