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Proceedings Paper

Design and development of the high-resolution spectrograph HERMES and the unique volume phase holographic gratings
Author(s): J. A. C. Heijmans; L. Gers; B. Faught
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Paper Abstract

We report on the grating development for the High Efficiency and Resolution Multi Element Spectrograph (HERMES). This paper discusses the challenges of designing, optimizing, and tolerancing large aperture volume phase holographic (VPH) gratings for HERMES. The high spectral resolution requirements require steep angles of incidence, of 67.2 degrees, and high line densities, ranging between 2400 and 3800 lines per mm, resulting in VPH gratings that are highly s-polarized that push the fabrication process to its limits.

Paper Details

Date Published: 21 September 2011
PDF: 9 pages
Proc. SPIE 8167, Optical Design and Engineering IV, 81671A (21 September 2011); doi: 10.1117/12.897273
Show Author Affiliations
J. A. C. Heijmans, Australian Astronomical Observatory (Australia)
L. Gers, Australian Astronomical Observatory (Australia)
B. Faught, Cascade Optical Corp. (United States)


Published in SPIE Proceedings Vol. 8167:
Optical Design and Engineering IV
Jean-Luc M. Tissot; Laurent Mazuray; Rolf Wartmann; Jeffrey M. Raynor; Andrew Wood, Editor(s)

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