Optical design and analysis of calibration system for SCALES instrument

Amirul Hasan; Ravinder K. Banyal; Renate Kupke; Andrew J. Skemer; Ajin Prakash; Sivarani Thirupathi; Deno Stelter; Ramya Sethuram; Arun Surya; Nick MacDonald; Steph Sallum; Mackenzie Lach; Scott Lilley

doi:10.1117/12.3019833

19 July 2024 Optical design and analysis of calibration system for SCALES instrument

Amirul Hasan, Ravinder K. Banyal, Renate Kupke, Andrew J. Skemer, Ajin Prakash, Sivarani Thirupathi, Deno Stelter, Ramya Sethuram, Arun Surya, Nick MacDonald, Steph Sallum, Mackenzie Lach, Scott Lilley

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130966X (2024) https://doi.org/10.1117/12.3019833
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

SCALES, which stands for Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy, is a next-generation instrument planned for the Keck observatory. Primarily, the instrument will do high-contrast imaging and integral field spectroscopy (IFS) of directly imaged exoplanets in a 2.0–5.2 µm wavelength band. The IFS channel of SCALES offers low-resolution (R=35-250) and medium-resolution (R=2500-7000) modes, for the discovery and spectral characterisation of the atmospheres of cold, high-mass exoplanets, and brown-dwarfs with temperatures <600 K. The array of lenslet/slenslit yields multiple spectra in each frame, forming a 3D spectral cube (x, y, λi) of the spatial scene. To facilitate the spectral extraction, a robust calibration system is required to measure the point spread function (PSF) of the IFS at different wavelengths and spatial locations. This calibration system is strategically integrated before the telescope's focus and adoptive optics system, playing a dual role: generating the telescope beam and forming a pupil that aligns with the Keck's pupil before reaching SCALES. In this work, we describe the calibration requirements, design, analysis, and functionality.

Citation Download Citation

Amirul Hasan, Ravinder K. Banyal, Renate Kupke, Andrew J. Skemer, Ajin Prakash, Sivarani Thirupathi, Deno Stelter, Ramya Sethuram, Arun Surya, Nick MacDonald, Steph Sallum, Mackenzie Lach, and Scott Lilley "Optical design and analysis of calibration system for SCALES instrument", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130966X (19 July 2024); https://doi.org/10.1117/12.3019833

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE