2 August 2014 A freeform-based, fast, wide-field, and distortion-free camera for ultralow surface brightness surveys
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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.
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Emmanuel Hugot, Xin Wang, David Valls-Gabaud, Gérard Lemaître, Tibor Agócs, Rong Shu, Jianyu Wang, "A freeform-based, fast, wide-field, and distortion-free camera for ultralow surface brightness surveys", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91434X (2 August 2014); doi: 10.1117/12.2057461; https://doi.org/10.1117/12.2057461
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