We describe the design and initial results from a visible-light Lyot coronagraph for SCExAO/VAMPIRES. The coronagraph is comprised of four hard-edged, partially transmissive focal plane masks with inner working angles of 36 mas, 55 mas, 92 mas, and 129 mas, respectively. The Lyot stop is a reflective, undersized design with a geometric throughput of 65.7%. Our preliminary on-sky contrast is 1e-2 at 0.1" to 1e-4 at 0.75" for all mask sizes. The coronagraph was deployed in early 2022 and is available for open use.
Cite
@article{arxiv.2208.02380,
title = {A Visible-light Lyot Coronagraph for SCExAO/VAMPIRES},
author = {Miles Lucas and Michael Bottom and Olivier Guyon and Julien Lozi and Barnaby Norris and Vincent Deo and Sebastien Vievard and Kyohoon Ahn and Nour Skaf and Peter Tuthill},
journal= {arXiv preprint arXiv:2208.02380},
year = {2022}
}
Comments
Proceedings of SPIE 2022 Astronomical Instrumentation and Telescopes conference (#12184-163)