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Proceedings Paper

A freeform-based, fast, wide-field, and distortion-free camera for ultralow surface brightness surveys
Author(s): Emmanuel Hugot; Xin Wang; David Valls-Gabaud; Gérard Lemaître; Tibor Agócs; Rong Shu; Jianyu Wang
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Paper Abstract

Testing the predictions of galaxy formation scenarios on mildly- and non-linear regimes requires the detection from space of ultra-low surface brightness features both around galaxies (dwarf satellites) and in the cosmic web (filaments). The requirements of such a space mission imply innovative concepts for fast, wide-field, distortion-free telescopes. Several optical designs, based on freeform mirrors, are presented and compared here to address these stringent constraints on space-borne, wide field drift-scanning imaging. An optimal solution is presented, showing that a telescope with f/2, 4° × 2° FoV, with a 50 cm pupil can achieve the required exquisite image quality, free of distortion, with an optimal SNR in the detection of ultra-low surface brightness.

Paper Details

Date Published: 2 August 2014
PDF: 11 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91434X (2 August 2014); doi: 10.1117/12.2057461
Show Author Affiliations
Emmanuel Hugot, Lab. d'Astrophysique de Marseille (France)
Xin Wang, Lab. d'Astrophysique de Marseille (France)
Shanghai Institute of Technical Physics (China)
David Valls-Gabaud, LERMA, Observatoire de Paris (France)
National Astronomical Observatories (China)
Institute of High Energy Physics (China)
Gérard Lemaître, Lab. d'Astrophysique de Marseille (France)
Tibor Agócs, ASTRON (Netherlands)
Rong Shu, Shanghai Institute of Technical Physics (China)
Jianyu Wang, Lab. d'Astrophysique de Marseille (France)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

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