High-contrast imager for complex aperture telescopes (HiCAT): 8. Dark zone demonstration with simultaneous closed loop low-order wavefront sensing and control

Soummer, Rémi; Por, Emiel H.; Pourcelot, Raphaël; Redmond, Susan; Laginja, Iva; Will, Scott D.; Perrin, Marshall D.; Pueyo, Laurent; Sahoo, Ananya; Petrone, Peter; Brooks, Keira; Fox, Rachel; Klein, Alex; Nickson, Bryony; Comeau, Thomas; Fabert, Marc; Gontrum, Rob; Hagopian, John G.; Leboulleux, Lucie; Leongomez, Daniel; Lugten, Joe; Mugnier, Laurent M.; N’Diaye, Mamadou; Nguyen, Meiji M.; Noss, James; Sauvage, Jean-François; Scott, Nathan A.; Sivaramakrishnan, Anand; Subedi, Hari; Weinstock, Sam

doi:10.1117/12.2630444

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…1 This was done by replacing the VVC mask with an imaging detector and measuring the PSF directly at the location where the correction was required. We have now adopted a new method that employs the differential optical transfer function (dOTF) [16][17][18] wavefront sensing technique with a similar experimental setup; a camera is substituted for the VVC mask and commands are sent to the high-order deformable mirror (HODM) to both modulate and correct the PSF. The HODM is a Boston Micromachines Corporation (BMC) 19 952-actuator Kilo DM.…”

Section: Dotf Phase Flatteningmentioning

confidence: 99%

The PICTURE-C exoplanetary imaging balloon mission: second flight results and the transition to a new mission, PICTURE-D

Mendillo,

Hewawasam,

Martel

et al. 2023

Techniques and Instrumentation for Detection of Exoplanets XI

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The PICTURE-C balloon mission launched on its second flight from Fort Sumner, NM on September 28, 2022. During this flight, PICTURE-C, which consists of a 60 cm off-axis telescope feeding a vector vortex coronagraph, demonstrated the first high-contrast dark hole from an observatory in a near-space environment. The coronagraph achieved a modest broadband (20%) contrast ratio of 5 x 10-6 , with performance limited by dynamic pointing transients. The low-order wavefront control system achieved optical pointing stabilization of one milliarcseconds RMS for intervals of up to 30 seconds between these transients. This paper will summarize the second flight results and present the development path for PICTURE-D, the next generation direct imaging balloon mission.

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Section: Dotf Phase Flatteningmentioning

confidence: 99%

The PICTURE-C exoplanetary imaging balloon mission: second flight results and the transition to a new mission, PICTURE-D

Mendillo,

Hewawasam,

Martel

et al. 2023

Techniques and Instrumentation for Detection of Exoplanets XI

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show abstract

“…Launcher templates are provided for a number of realistic telescope configurations, such as LUVOIR-A, 6 HiCAT, 7 and Gemini/GPI. 8 Once launched, the toolkit produces all the necessary input files defining the telescope apertures and intermediate masks; it then calls a routine to write a collection of "driver" files (one for each parameter combination) to be executed in queued batches on a computing server.…”

Section: Parameter Space Surveysmentioning

confidence: 99%

APLC-optimization: an apodized pupil Lyot coronagraph design survey toolkit

Nickson¹,

Por²,

Nguyen³

et al. 2022

Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave

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We present a publicly available software package developed for exploring apodized pupil Lyot coronagraph (APLC) solutions for various telescope architectures. In particular, the package optimizes the apodizer component of the APLC for a given focal-plane mask and Lyot stop geometry to meet a set of constraints (contrast, bandwidth etc.) on the coronagraph intensity in a given focal-plane region (i.e. dark zone). The package combines a high-contrast imaging simulation package (HCIPy 1 ) with a third-party mathematical optimizer (Gurobi) to compute the linearly optimized binary mask that maximizes transmission. We provide examples of the application of this toolkit to several different telescope geometries, including the Gemini Planet Imager (GPI) and the High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed. Finally, we summarize the results of a preliminary design survey for the case of a ∼6 m aperture off-axis space telescope, as recommended by the 2020 NASA Decadal Survey, exploring APLC solutions for different segment sizes. We then use the Pair-based Analytical model for Segmented Telescope Imaging from Space (PASTIS) to perform a segmented wavefront error tolerancing analysis on these solutions.

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High-contrast imager for complex aperture telescopes (HiCAT): 8. Dark zone demonstration with simultaneous closed loop low-order wavefront sensing and control

Cited by 2 publications

References 25 publications

The PICTURE-C exoplanetary imaging balloon mission: second flight results and the transition to a new mission, PICTURE-D

The PICTURE-C exoplanetary imaging balloon mission: second flight results and the transition to a new mission, PICTURE-D

APLC-optimization: an apodized pupil Lyot coronagraph design survey toolkit

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