SLM-based digital adaptive coronagraphy: current status and capabilities

Jonas Kühn; Polychronis Patapis; Xin Lu; Marcel Arikan

doi:10.1117/12.2312554

25 July 2018 SLM-based digital adaptive coronagraphy: current status and capabilities

Jonas Kühn, Polychronis Patapis, Xin Lu, Marcel Arikan

Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III; 107062N (2018) https://doi.org/10.1117/12.2312554
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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).

Conference Presentation

Citation Download Citation

Jonas Kühn, Polychronis Patapis, Xin Lu, and Marcel Arikan "SLM-based digital adaptive coronagraphy: current status and capabilities", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107062N (25 July 2018); https://doi.org/10.1117/12.2312554

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