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Active correction of aperture discontinuities (ACAD) for space telescope pupils: a parametic analysis

Mazoyer, Johan and Pueyo, Laurent and Norman, Colin and N'Diaye, Mamadou and Mawet, Dimitri and Soummer, Rémi and Perrin, Marshall and Choquet, Élodie and Carlotti, Alexis (2015) Active correction of aperture discontinuities (ACAD) for space telescope pupils: a parametic analysis. In: Techniques and Instrumentation for Detection of Exoplanets VII. Proceedings of SPIE. No.9605. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 96050M.

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As the performance of coronagraphs improves, the achievable contrast is more and more dependent of the shape of the pupil. The future generation of space and ground based coronagraphic instruments will have to achieve high contrast levels on on-axis and/or segmented telescopes. To correct for the high amplitude aberrations introduced by secondary mirror structures and segmentation of the primary mirror, we explore a two deformable mirror (DM) method. The major difficulty of several DM methods is the non-linear relation linking actuator strokes to the point spread function in the coronagraph focal plane. The Active Compensation of Aperture Discontinuities (ACAD) method is achieving this minimization by solving a non linear differential Monge Ampere equation. Once this open loop method have reached the minimum, a close-loop stroke minimization method can be applied to correct for phase and amplitude aberrations to achieve the ultimate contrast. In this paper, I describe the results of the parametric analysis that that I have undertaken on this method. After recalling the principle of the method, I will described the explored parameter space (deformable mirror set-up, shape of the pupil, bandwidth, coronagraph designs). I will precisely described the way I simulated the Vortex coronagraph for this numerical simulation. Finally I will present the preliminary results of this parametric analysis for space telescope pupils only.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Mazoyer, Johan0000-0002-9133-3091
Pueyo, Laurent0000-0003-3818-408X
N'Diaye, Mamadou0000-0002-1721-3294
Mawet, Dimitri0000-0002-8895-4735
Soummer, Rémi0000-0003-2753-2819
Perrin, Marshall0000-0002-3191-8151
Choquet, Élodie0000-0002-9173-0740
Additional Information:© 2015 SPIE. This material is based upon work carried out under subcontract #1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.
Funding AgencyGrant Number
Subject Keywords:Instrumentation, WFIRST-AFTA, High-contrast imaging, adaptive optics, wave-front error correction, deformable mirror
Series Name:Proceedings of SPIE
Issue or Number:9605
Record Number:CaltechAUTHORS:20160104-135253801
Persistent URL:
Official Citation:Johan Mazoyer ; Laurent Pueyo ; Colin Norman ; Mamadou N'Diaye ; Dimitri Mawet ; Rémi Soummer ; Marshall Perrin ; Élodie Choquet and Alexis Carlotti " Active correction of aperture discontinuities (ACAD) for space telescope pupils: a parametic analysis ", Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96050M (September 16, 2015); doi:10.1117/12.2188692;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63338
Deposited On:04 Jan 2016 22:39
Last Modified:10 Nov 2021 23:15

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