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Proceedings Paper

Spectrographs with holographic gratings on freeform surfaces: design approach and application for the LUVOIR mission
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Paper Abstract

In the present paper we demonstrate the approach to use a holographic grating on a freeform surface for advanced spectrographs design. On the example POLLUX spectropolarimeter medium-UV channel we chow that such a grating can operate as a cross-disperser and a camera mirror at the same time. It provides the image quality high enough to reach the spectral resolving power of 126 359-133 106 between 11.5 and 195 nm, which is higher than the requirement. Also we show a possibility to use a similar element working in transmission to build an unobscured double-Schmidt spectrograph. The spectral resolving power reaches 2750 for a long slit. It is also shown that the parameters of both the gratings are feasible with the current technologies.

Paper Details

Date Published: 5 June 2018
PDF: 9 pages
Proc. SPIE 10690, Optical Design and Engineering VII, 106901H (5 June 2018); doi: 10.1117/12.2311887
Show Author Affiliations
Eduard R. Muslimov, Aix Marseille Univ., CNRS, CNES, LAM (France)
Kazan National Research Technical Univ. named after A.N. Tupolev (Russian Federation)
Marc Ferrari, Aix Marseille Univ., CNRS, CNES, LAM (France)
Emmanuel Hugot, Aix Marseille Univ., CNRS, CNES, LAM (France)
Jean-Claude R. Bouret, Aix Marseille Univ., CNRS, CNES, LAM (France)
Coralie Neiner, Observatoire de Meudon, LESIA (France)
Simona Lombardo, Aix Marseille Univ., CNRS, CNES, LAM (France)
Gerard Lemaitre, Aix Marseille Univ., CNRS, CNES, LAM (France)
Robert Grange, Aix Marseille Univ., CNRS, CNES, LAM (France)

Published in SPIE Proceedings Vol. 10690:
Optical Design and Engineering VII
Laurent Mazuray; Rolf Wartmann; Andrew P. Wood, Editor(s)

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