Fabrication of pupil masks for a new infrared exoplanet imager at Keck Observatory

Jialin Li; Andrew Skemer; Maaike A. M. van Kooten; Renate Kupke; Nicholas MacDonald

doi:10.1117/12.2630622

29 August 2022 Fabrication of pupil masks for a new infrared exoplanet imager at Keck Observatory

Jialin Li, Andrew Skemer, Maaike A. M. van Kooten, Renate Kupke, Nicholas MacDonald

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121858N (2022) https://doi.org/10.1117/12.2630622
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES) is an instrument being designed to perform direct imaging of exoplanets in the mid-infrared (2-5 μm) with the Adaptive Optics System of W.M. Keck Observatory. To eliminate unwanted thermal infrared radiation, SCALES utilizes both a cold stop for excluding background radiation and a vector vortex coronagraph with Lyot stops for starlight suppression. Optimal geometric masks have been designed. We simulate the propagation of light through the Lyot plane and analyze the on-axis images of stars in the K, L, and M band for the performance of the Lyot stops. Additionally, finalized cold stop and Lyot stop designs are presented along with evaluations on the effects of manufacturing tolerances and tilt in pupil planes caused by off-axis parabolic mirror relays.

Citation Download Citation

Jialin Li, Andrew Skemer, Maaike A. M. van Kooten, Renate Kupke, and Nicholas MacDonald "Fabrication of pupil masks for a new infrared exoplanet imager at Keck Observatory", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121858N (29 August 2022); https://doi.org/10.1117/12.2630622

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