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29 August 2022 The Programmable Liquid-crystal Active Coronagraphic Imager for the DAG telescope (PLACID) instrument: Overview at FDR ahead of first light in 2022
Jonas G. Kühn, Laurent Jolissaint, Audrey Bouxin
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Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121841V (2022) https://doi.org/10.1117/12.2627964
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada
Abstract
The PLACID instrument is a novel high-contrast direct imaging facility that will come online on the Turkish 4-m DAG telescope in 2022. The project has just passed Final Design Review (FDR) in December 2021, with first light scheduled for the end of 2022. In practice, PLACID will be the world’s first ever “active coronagraph” facility, fielding a customized spatial light modulator (SLM) acting as a dynamically programmable coronagraph from H- to Ks-band. This will provide a wealth of interesting options to the observers. We hereby present the FDR base design of PLACID, and early laboratory and factory results illustrating the performance.
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Jonas G. Kühn, Laurent Jolissaint, and Audrey Bouxin "The Programmable Liquid-crystal Active Coronagraphic Imager for the DAG telescope (PLACID) instrument: Overview at FDR ahead of first light in 2022", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121841V (29 August 2022); https://doi.org/10.1117/12.2627964
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KEYWORDS
Coronagraphy
Telescopes
Imaging systems
Liquid crystals
Coherence imaging
Spatial light modulators
Calibration
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