Conceptual design of the NFIRAOS Science Calibration Unit

Peter W. G. Byrnes; Jenny Atwood; Jean-Thomas Landry; Marc-André Boucher; Paolo Spanò; Glen Herriot

doi:10.1117/12.3019224

27 August 2024 Conceptual design of the NFIRAOS Science Calibration Unit

Peter W. G. Byrnes, Jenny Atwood, Jean-Thomas Landry, Marc-André Boucher, Paolo Spanò, Glen Herriot

Proceedings Volume 13097, Adaptive Optics Systems IX; 130975R (2024) https://doi.org/10.1117/12.3019224
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The NFIRAOS Science Calibration Unit (NSCU) is a large subsystem of NFIRAOS that provides calibration light for the instruments fed by NFIRAOS. It is physically separate from NFIRAOS proper, located outside of the NFIRAOS optics enclosure and ahead of the NFIRAOS entrance window. The NSCU incorporates flat-field illumination sources and the relay optics necessary to inject calibration light into the NFIRAOS optical path, including a fold mirror which is retracted for night-time science observations, allowing telescope light to pass through the NSCU directly into NFIRAOS. The two major requirements of the NFIRAOS science calibration unit (NSCU) are to provide flat-fielding and wavelength-calibration illuminations to NFIRAOS-fed instruments for calibration of scientific data and to provide pupil-simulated telescope beams to NFIRAOS for calibration of the telescope pupil. This paper will summarize the optical and mechanical designs of the NSCU, including light sources and relay optics design, structural trade studies and downselection, and alignment and integration considerations.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Peter W. G. Byrnes, Jenny Atwood, Jean-Thomas Landry, Marc-André Boucher, Paolo Spanò, and Glen Herriot "Conceptual design of the NFIRAOS Science Calibration Unit", Proc. SPIE 13097, Adaptive Optics Systems IX, 130975R (27 August 2024); https://doi.org/10.1117/12.3019224

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