Cosmic evolution through UV surveys (CETUS): point spread function analysis of three mirror anastigmat telescope

Jaren N. Ashcraft; Heejoo Choi; Sara R. Heap; Robert A. Woodruff; Dae Wook Kim

doi:10.1117/12.2598879

24 August 2021 Cosmic evolution through UV surveys (CETUS): point spread function analysis of three mirror anastigmat telescope

Jaren N. Ashcraft, Heejoo Choi, Sara R. Heap, Robert A. Woodruff, Dae Wook Kim

Author Affiliations +

Proceedings Volume 11820, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems III; 118200H (2021) https://doi.org/10.1117/12.2598879
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

From studying the fossil records of stars to exploring the circumgalactic medium, UV astronomy is a field rife with scientific opportunity. CETUS is a proposed next-generation UV space telescope equipped with a suite of instruments tailored to the study of UV phenomena in our galaxy. To achieve diffraction-limited imaging and spectroscopy performance at short wavelengths, a high-performance and resolution optical design is necessary. We describe the telescope design options including a trade study between a traditional on-axis TMA and freeform off-axis TMA solution considering their alignment sensitivity and tolerances. Different secondary support structures are explored for the on-axis design to analyze the irradiance distribution of the point-spread function (PSF) due to the pupil obscuration and how it influences the simulated starfield at the telescope focal planes. With rigorous analysis we aim to enable the next spaceborne observatory for UV astronomy.

Conference Presentation

Citation Download Citation

Jaren N. Ashcraft, Heejoo Choi, Sara R. Heap, Robert A. Woodruff, and Dae Wook Kim "Cosmic evolution through UV surveys (CETUS): point spread function analysis of three mirror anastigmat telescope", Proc. SPIE 11820, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems III, 118200H (24 August 2021); https://doi.org/10.1117/12.2598879

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