Fast linearized coronagraph optimizer (FALCO) I: a software toolbox for rapid coronagraphic design and wavefront correction

Riggs, A. J. Eldorado; Ruane, Garreth; Sidick, Erkin; Coker, Carl T.; Kern, Brian; Shaklan, Stuart

doi:10.1117/12.2313812

Cited by 52 publications

(55 citation statements)

References 22 publications

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“…This section illustrates the Electric Field Order Reduction (EFOR) method for estimating the incoherent intensity given a history of photon counts (images), control inputs, and, possibly, a set of reference images (the data and code for generating the results below are given at: https://github.com/leonidprinceton/EFOR). The data was simulated with the Fast Linearized Coronagraph Optimizer (FALCO) (Riggs et al (2018)) model of the WFIRST hybrid Lyot coronagraph.…”

Section: Numerical Simulationmentioning

confidence: 99%

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Reduced Order Estimation of the Speckle Electric Field History for Space-based Coronagraphs

Pogorelyuk

Kasdin

Rowley

2019

ApJ

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In high-contrast space-based coronagraphs, one of the main limiting factors for imaging the dimmest exoplanets is the time varying nature of the residual starlight (speckles). Modern methods try to differentiate between the intensities of starlight and other sources, but none incorporate models of space-based systems which can take into account actuations of the deformable mirrors. Instead, we propose formulating the estimation problem in terms of the electric field while allowing for dithering of the deformable mirrors. Our reduced-order approach is similar to intensity-based PCA (e.g. KLIP) although, under certain assumptions, it requires a considerably lower number of modes of the electric field. We illustrate this by a FALCO simulation of the WFIRST hybrid Lyot coronagraph. a)

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Section: Numerical Simulationmentioning

confidence: 99%

“…(b) Side by side comparison of the speckles and the planet on a logarithmic scale. The data was obtained using a model of the WFIRST hybrid Lyot coronagraph implemented in FALCO(Riggs et al (2018)).…”

mentioning

confidence: 99%

Reduced Order Estimation of the Speckle Electric Field History for Space-based Coronagraphs

Pogorelyuk

Kasdin

Rowley

2019

ApJ

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“…Example coronagraph designs from the FALCO software. 128 Each design achieves raw contrast ≤ 10 −10 . First row: A 2DM (64×64 actuators each) apodized Lyot coronagraph for a potential LUVOIR aperture.…”

Section: Falco: Fast Linearized Coronagraph Optimizermentioning

confidence: 99%

Review of high-contrast imaging systems for current and future ground- and space-based telescopes I: coronagraph design methods and optical performance metrics

Ruane¹,

Riggs

Mazoyer³

et al. 2018

Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave

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The Optimal Optical Coronagraph (OOC) Workshop at the Lorentz Center in September 2017 in Leiden, the Netherlands gathered a diverse group of 25 researchers working on exoplanet instrumentation to stimulate the emergence and sharing of new ideas. In this first installment of a series of three papers summarizing the outcomes of the OOC workshop, we present an overview of design methods and optical performance metrics developed for coronagraph instruments. The design and optimization of coronagraphs for future telescopes has progressed rapidly over the past several years in the context of space mission studies for Exo-C, WFIRST, HabEx, and LUVOIR as well as ground-based telescopes. Design tools have been developed at several institutions to optimize a variety of coronagraph mask types. We aim to give a broad overview of the approaches used, examples of their utility, and provide the optimization tools to the community. Though it is clear that the basic function of coronagraphs is to suppress starlight while maintaining light from off-axis sources, our community lacks a general set of standard performance metrics that apply to both detecting and characterizing exoplanets. The attendees of the OOC workshop agreed that it would benefit our community to clearly define quantities for comparing the performance of coronagraph designs and systems. Therefore, we also present a set of metrics that may be applied to theoretical designs, testbeds, and deployed instruments. We show how these quantities may be used to easily relate the basic properties of the optical instrument to the detection significance of the given point source in the presence of realistic noise.

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“…Ruane et al 12 reviewed the basic elements of coronagraph design and the publicly available design tools. The WFIRST instrument has been extensively modeled in the PROPER [13][14][15][16] and FALCO 17,18 libraries. This preliminary work extends those models to small angles from the target star, within the CGI Inner Working Angle (IWA).…”

Section: Introductionmentioning

confidence: 99%

Simulating the effects of exozodiacal dust in WFIRST CGI observations

Douglas

Debes

Milani

et al. 2019

Techniques and Instrumentation for Detection of Exoplanets IX

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The WFIRST Coronagraph Instrument (CGI) will image the environment close to stars at orders of magnitude higher sensitivity than current observatories. In addition to directly imaging giant exoplanets, WFIRST CGI has unprecedented sensitivity to scattered light from circumstellar dust. Most modeling has been confined to the dark-hole regime of the coronagraph (approximately 0.15 arcsec to 1 arcsec). This work uses publicly available field-dependent point spread functions to model an exozodiacal disk within the 0.15 arcsec inner working angle. For this simple Solar System-like test case, we find an approximately 25% increase in the transmitted exozodiacal flux due to light inside the inner working angle. We also describe plans to accelerate and extend this modeling to a wider range of geometries, and to quantify the impact on post-processing and source detection.

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Fast linearized coronagraph optimizer (FALCO) I: a software toolbox for rapid coronagraphic design and wavefront correction

Cited by 52 publications

References 22 publications

Reduced Order Estimation of the Speckle Electric Field History for Space-based Coronagraphs

Reduced Order Estimation of the Speckle Electric Field History for Space-based Coronagraphs

Review of high-contrast imaging systems for current and future ground- and space-based telescopes I: coronagraph design methods and optical performance metrics

Simulating the effects of exozodiacal dust in WFIRST CGI observations

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