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Active coronagraphy is deemed to play a key role for the next generation ofhigh-contrast instruments, notably in order to deal with large segmentedmirrors that might exhibit time-dependent pupil merit function, caused bymissing or defective segments. To this purpose, we recently introduced a newtechnological framework called digital adaptive coronagraphy (DAC), making useof liquid-crystal spatial light modulators (SLMs) display panels operating asactive focal-plane phase mask coronagraphs. Here, we first review the latestcontrast performance, measured in laboratory conditions with monochromaticvisible light, and describe a few potential pathways to improve SLMcoronagraphic nulling in the future. We then unveil a few unique capabilitiesof 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 starsystems, and coherent differential imaging (CDI).

SLM-based Digital Adaptive Coronagraphy: Current Status and Capabilities