RST CGI: final verification and calibration of prism and polarizer flight units

Tyler D. Groff; Neil Zimmerman; Hari Subedi; John Titus; Dylan Bell; Guangjun Gao; Samuel Gaylin; Nicholas Nicolaeff; Toru Yamada; Motohide Tamura

doi:10.1117/12.2677576

6 October 2023 RST CGI: final verification and calibration of prism and polarizer flight units

Tyler D. Groff, Neil Zimmerman, Hari Subedi, John Titus, Dylan Bell, Guangjun Gao, Samuel Gaylin, Nicholas Nicolaeff, Toru Yamada, Motohide Tamura

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126800W (2023) https://doi.org/10.1117/12.2677576
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) will demonstrate spectroscopy of planets and polarization measurements of disks. The spectroscopy and polarization modes utilize Amici and Wollaston prism designs. The spectroscopy mode, designed and built and Goddard Space Flight Center (GSFC), has a resolution of R50 in 15% bands centered at 660nm and 730nm. The Wollaston design and optics are contributed by the Japanese Aerospace Exploration Agency, with final alignment and testing at GSFC. We present the requirements, ground-to-orbit calibration, and deployable slit operations. We also detail on the design, results from the as-built flight assemblies.

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Tyler D. Groff, Neil Zimmerman, Hari Subedi, John Titus, Dylan Bell, Guangjun Gao, Samuel Gaylin, Nicholas Nicolaeff, Toru Yamada, and Motohide Tamura "RST CGI: final verification and calibration of prism and polarizer flight units", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126800W (6 October 2023); https://doi.org/10.1117/12.2677576

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KEYWORDS

Prisms

Calibration

Polarization

Polarizers

Spectroscopes

Equipment

Spectral resolution

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