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Discretized aperture mapping for wavefront sensing

Patru, Fabien and Carbillet, Marcel and Jolissaint, Laurent and Mawet, Dimitri and Antichi, Jacopo (2020) Discretized aperture mapping for wavefront sensing. In: Optical and Infrared Interferometry and Imaging VII. No.11446. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114462Z. ISBN 9781510636798.

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DAM (Discretized Aperture Mapping) is an original filtering device able to improve the performance in high-angular resolution and high-contrast imaging by the present class of large telescopes equipped with adaptive optics (Patru et al. 2011, 2014, 2015). DAM is a high-spatial frequency filter able to remove the problematic phase errors produced by the small scale defects in the wavefront. Various effects are related to high-order aberrations (ie the high-spatial frequency content) which are neither seen by any wavefront sensor (WFS) nor corrected by any adaptive optics (AO) and is thus transmitted up to the final detector. In particular, any wavefront sensor, due to its finite sub-apertures size, is fundamentally limited by the well-known aliasing effect, where high-spatial frequencies are seen as spurious low frequencies. DAM can be used as an anti-aliasing filter in order to improve both the accuracy of the WFS measurements and the stability of the AO compensation.

Item Type:Book Section
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URLURL TypeDescription Poster Poster
Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).
Group:Astronomy Department
Issue or Number:11446
Record Number:CaltechAUTHORS:20210113-113126221
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Official Citation:Fabien Patru, Jacopo Antichi, Marcel Carbillet, Laurent Jolissaint, and Dimitri P. Mawet "Discretized aperture mapping for wavefront sensing", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114462Z (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107455
Deposited By: Tony Diaz
Deposited On:13 Jan 2021 20:13
Last Modified:16 Nov 2021 19:03

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