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Proceedings Paper

Combining freeform-shaped holographic grating and curved detectors in a scheme of multi-slit astronomic spectrograph
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Paper Abstract

In the present work we consider optical design of a multi-slit astronomic spectrograph for UV domain with freeform reflective elements. The scheme consists of only two reflective elements – a holographic grating imposed on freeform surface and a freeform mirror. The freeforms are described by standard Zernike polynomials and the hologram is recorded by two coherent point sources. We demonstrate that in such a scheme it’s possible to obtain quite high optical quality for an extended field of view and relatively high dispersion on a curved image surface. The spectrograph works with linear field of view of 76x32 mm and provides reciprocal linear dispersion equal to 0.5 nm/mm and typical resolving power of 15 000 over the UV range of 100-200 nm. Feasibility of the optical components is discussed and coupling of the spectrograph with a TMA telescope is demonstrated.

Paper Details

Date Published: 15 May 2017
PDF: 9 pages
Proc. SPIE 10233, Holography: Advances and Modern Trends V, 102331M (15 May 2017); doi: 10.1117/12.2264790
Show Author Affiliations
Eduard R. Muslimov, Aix Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Kazan National Research Technical Univ. named after A.N. Tupolev (Russian Federation)
Emmanuel Hugot, Aix Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Marc Ferrari, Aix Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)

Published in SPIE Proceedings Vol. 10233:
Holography: Advances and Modern Trends V
Miroslav Hrabovský; John T. Sheridan; Antonio Fimia, Editor(s)

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