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SLM-based digital adaptive coronagraphy: current status and capabilities
Author(s): Jonas Kühn; Polychronis Patapis; Xin Lu; Marcel Arikan
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Paper Abstract

Active coronagraphy is deemed to play a key role for the next generation of high-contrast instruments, notably in order to deal with large segmented mirrors that might exhibit time-dependent pupil merit function, caused by missing or defective segments. To this purpose, we recently introduced a new technological framework called digital adaptive coronagraphy (DAC), making use of liquid-crystal spatial light modulators (SLMs) display panels operating as active focal-plane phase mask coronagraphs. Here, we first review the latest contrast performance, measured in laboratory conditions with monochromatic visible light, and describe a few potential pathways to improve SLM coronagraphic nulling in the future. We then unveil a few unique capabilities of SLM-based DAC that were recently, or are currently in the process of being, demonstrated in our laboratory, including NCPA wavefront sensing, aperture-matched adaptive phase masks, coronagraphic nulling of multiple star systems, and coherent differential imaging (CDI).

Paper Details

Date Published: 25 July 2018
PDF: 14 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107062N (25 July 2018); doi: 10.1117/12.2312554
Show Author Affiliations
Jonas Kühn, ETH Zürich (Switzerland)
Polychronis Patapis, ETH Zurich (Switzerland)
Xin Lu, ETH Zurich (Switzerland)
Marcel Arikan, ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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