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Proceedings Paper

Design and modeling of a moderate-resolution astronomic spectrograph with volume-phase holographic gratings
Author(s): Eduard R. Muslimov; Gennady G. Valyavin; Sergey N. Fabrika; Nadezhda K. Pavlycheva
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Paper Abstract

We present an optical design of astronomic spectrograph based on a cascade of volume-phase holographic gratings. The cascade consists of three gratings. Each of them provides moderately high spectral resolution in a narrow range of 83nm. Thus the spectrum image represents three lines covering region 430-680nm. Two versions of the scheme are described: a full-scale one with estimated resolving power of 5300-7900 and a small-sized one intended for creation of a lab prototype, which provides the resolving power of 1500-3000. Diffraction efficiency modeling confirms that the system throughput can reach 75%, while stray light caused by the gratings crosstalk is negligible. We also propose a design of image slicer and focal reducer allowing to couple the instrument with a 6m-telescope. Finally, we present concept of the instrument’s optomechanical design.

Paper Details

Date Published: 9 August 2016
PDF: 9 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990842 (9 August 2016); doi: 10.1117/12.2231985
Show Author Affiliations
Eduard R. Muslimov, Kazan National Research Technological Univ. (Russian Federation)
Gennady G. Valyavin, Special Astrophysical Observatory (Russian Federation)
Sergey N. Fabrika, Special Astrophysical Observatory (Russian Federation)
Nadezhda K. Pavlycheva, Kazan National Research Technological Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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