146 citations · 463 across the 53 of their papers we have counts for
56 papers
Nonlinear Thermal Modeling and Predictive Control for Spacecraft Optical Temperature Regulation
Marcus C. Klupar, Daniel T. Larsson, Ewan S. Douglas
Maintaining a stable thermal environment is critical for spacecraft carrying precision optics, as temperature gradients and thermal expansion can alter the geometric alignment of o…
Exploring Exoplanets with Interferometry
Sascha P. Quanz, Bertrand Mennesson, Charles Beichman +27
(Extract from the Executive Summary) Humanity stands at the threshold of answering one of its most profound questions: Does life exist beyond Earth? Ongoing and upcoming space miss…
Coronagraphic Data Post-processing Using Projections on Instrumental Modes
Yinzi Xin, Laurent Pueyo, Romain Laugier +4
Directly observing exoplanets with coronagraphs is impeded by the presence of speckles from aberrations in the optical path, which can be mitigated in hardware with wavefront contr…
Hybrid propagation physics for the design and modeling of astronomical observatories: a coronagraphic example
Jaren N. Ashcraft, Ewan S. Douglas, Daewook Kim +1
For diffraction-limited optical systems an accurate physical optics model is necessary to properly evaluate instrument performance. Astronomical observatories outfitted with corona…
Approaches to lowering the cost of large space telescopes
Ewan S Douglas, Greg Aldering, Greg W. Allan +26
New development approaches, including launch vehicles and advances in sensors, computing, and software, have lowered the cost of entry into space, and have enabled a revolution in…
Approaches to developing tolerance and error budget for active three mirror anastigmat space telescopes
Heejoo Choi, Young-Sik Kim, Hyukmo Kang +6
The size of the optics used in observatories is often limited by fabrication, metrology, and handling technology, but having a large primary mirror provides significant benefits fo…
Nancy Grace Roman Space Telescope Coronagraph Instrument Overview and Status
Vanessa P. Bailey, Eduardo Bendek, Brian Monacelli +19
The Nancy Grace Roman Space Telescope Coronagraph Instrument is a critical technology demonstrator for NASA's Habitable Worlds Observatory. With a predicted visible-light flux rati…
Focus diverse phase retrieval testbed development of continuous wavefront sensing for space telescope applications
Hyukmo Kang, Kyle Van Gorkom, Jess Johnson +4
Continuous wavefront sensing on future space telescopes allows relaxation of stability requirements while still allowing on-orbit diffraction-limited optical performance. We consid…
Integrated modeling of wavefront sensing and control for space telescopes utilizing active and adaptive optics
Kevin Z. Derby, Kian Milani, Solvay Blomquist +9
Extreme wavefront correction is required for coronagraphs on future space telescopes to reach 1e-8 or better starlight suppression for the direct imaging and characterization of ex…
Compact Three Mirror Anastigmat Space Telescope Design using 6.5m Monolithic Primary Mirror
Daewook Kim, Heejoo Choi, Ewan S. Douglas
The utilization of a 6.5m monolithic primary mirror in a compact three-mirror anastigmat (TMA) telescope design offers unprecedented capabilities to accommodate various next genera…
Poke: An open-source ray-based physical optics platform
Jaren N. Ashcraft, Ewan S. Douglas, Daewook Kim +8
Integrated optical models allow for accurate prediction of the as-built performance of an optical instrument. Optical models are typically composed of a separate ray trace and diff…
NMF-based GPU accelerated coronagraphy pipeline
Sai Krishanth P. M., Ewan S. Douglas, Justin Hom +4
We present a generalized Non-negative factorization (NMF)-based data reduction pipeline for circumstellar disk and exoplanet detection. By using an adaptable pre-processing routine…
Microfabricated pinholes for high contrast imaging testbeds
Emory L. Jenkins, Kyle Van Gorkom, Kevin Derby +2
In order to reach contrast ratios of and beyond, coronagraph testbeds need source optics that reliably emulate nearly-point-like starlight, with microfabricated pinholes…
Simulating the efficacy of the implicit-electric-field-conjugation algorithm for the Roman Coronagraph with noise
Kian Milani, Ewan Douglas, Sebastiaan Haffert +1
The Roman Coronagraph is expected to perform its high-order wavefront sensing and control (HOWFSC) with a ground-in-the-loop scheme due to the computational complexity of the Elect…
Analysis of active optics correction for a large honeycomb mirror
Solvay Blomquist, Hubert Martin, Hyukmo Kang +5
In the development of space-based large telescope systems, having the capability to perform active optics correction allows correcting wavefront aberrations caused by thermal pertu…
Estimation of polarization aberrations and their effect on the coronagraphic performance for future space telescopes
Ramya M Anche, Sebastiaan Y. Haffert, Jaren N Ashcraft +5
A major goal of proposed future space observatories, such as the Habitable World Observatory, is to directly image and characterize Earth-like planets around Sun-like stars to sear…
Polarimetric modeling and assessment of science cases for Giant Magellan Telescope-Polarimeter (GMT-Pol)
Ramya M Anche, Grant Williams, Hill Tailor +5
Polarization observations through the next-generation large telescopes will be invaluable for exploring the magnetic fields and composition of jets in AGN, multi-messenger transien…
Laboratory demonstration of the triple-grating vector vortex coronagraph
David S. Doelman, Mireille Ouellet, Axel Potier +5
The future Habitable Worlds Observatory aims to characterize the atmospheres of rocky exoplanets around solar-type stars. The vector vortex coronagraph (VVC) is a main candidate to…
Polarization aberrations in next-generation giant segmented mirror telescopes (GSMTs) I. Effect on the coronagraphic performance
Ramya M. Anche, Jaren N. Ashcraft, Sebastiaan Y. Haffert +8
Next-generation large segmented mirror telescopes are expected to perform direct imaging and characterization of Earth-like rocky planets, which requires contrast limits of $10^{-7…
The space coronagraph optical bench (SCoOB): 2. wavefront sensing and control in a vacuum-compatible coronagraph testbed for spaceborne high-contrast imaging technology
Kyle Van Gorkom, Ewan S. Douglas, Jaren N. Ashcraft +9
The 2020 Decadal Survey on Astronomy and Astrophysics endorsed space-based high contrast imaging for the detection and characterization of habitable exoplanets as a key priority fo…
The Space Coronagraph Optical Bench (SCoOB): 1. Design and Assembly of a Vacuum-compatible Coronagraph Testbed for Spaceborne High-Contrast Imaging Technology
Jaren N. Ashcraft, Heejoo Choi, Ewan S. Douglas +14
The development of spaceborne coronagraphic technology is of paramount importance to the detection of habitable exoplanets in visible light. In space, coronagraphs are able to bypa…
Simulations of polarimetric observations of debris disks through the Roman Coronagraph Instrument
Ramya Manjunath Anche, Ewan S. Douglas, Kian Milani +2
The Roman coronagraph instrument will demonstrate high-contrast imaging technology, enabling the imaging of faint debris disks, the discovery of inner dust belts, and planets. Pola…
Flatfield Calibrations with Astrophysical Sources for the Nancy Grace Roman Space Telescope's Coronagraph Instrument
Erin R. Maier, Robert T. Zellem, M. Mark Colavita +12
The Nancy Grace Roman Space Telescope Coronagraph Instrument is a high-contrast imager, polarimeter, and spectrometer that will enable the study of exoplanets and circumstellar dis…
Nancy Grace Roman Space Telescope Coronagraph Instrument Observation Calibration Plan
Robert T. Zellem, Bijan Nemati, Guillermo Gonzalez +20
NASA's next flagship mission, the Nancy Grace Roman Space Telescope, is a 2.4-meter observatory set to launch no later than May 2027. Roman features two instruments: the Wide Field…