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Proceedings Paper

MEGARA: large pupil element tests and performance
Author(s): I. Martínez-Delgado; E. Sánchez-Blanco; A. Pérez-Calpena; M. L. García-Vargas; X. M. Maldonado; A. Gil de Paz; E. Carrasco; J. Gallego; J. Iglesias-Páramo; F. M. Sánchez-Moreno
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Paper Abstract

MEGARA is a third generation spectrograph for the Spanish 10.4m telescope (GTC) providing two observing modes: a large central Integral Field Unit (IFU), called the Large Compact Bundle (LCB), covering a FOV of 12.5 × 11.3 arcsec2, and a Multi-Object Spectrograph (MOS) with a FOV of 3.5 × 3.5 arcmin2. MEGARA will observe the whole visible range from 3650A to 10000A allowing different spectral resolutions (low, medium and high) with R = 6000, 11000 and 18000 respectively. The dispersive elements are placed at the spectrograph pupil position in the path of the collimated beam and they are composed of a set of volume phase hologram gratings (VPHs) sandwiched between two flat windows and coupled in addition to two prisms in the case of the medium- and high-resolution units. We will describe the tests and setups developed to check the requirements of all units, as well as the obtained performance at laboratory

Paper Details

Date Published: 22 July 2016
PDF: 12 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99124D (22 July 2016); doi: 10.1117/12.2233298
Show Author Affiliations
I. Martínez-Delgado, FRACTAL S.L.N.E (Spain)
E. Sánchez-Blanco, FRACTAL S.L.N.E (Spain)
A. Pérez-Calpena, FRACTAL S.L.N.E (Spain)
M. L. García-Vargas, FRACTAL S.L.N.E (Spain)
X. M. Maldonado, FRACTAL S.L.N.E (Spain)
A. Gil de Paz, Univ. Complutense de Madrid (Spain)
E. Carrasco, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
J. Gallego, Univ. Complutense de Madrid (Spain)
J. Iglesias-Páramo, Instituto de Astrofísica de Andalucía (Spain)
F. M. Sánchez-Moreno, Univ. Politécnica de Madrid (Spain)

Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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