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Proceedings Paper

Opto-mechanical design of an image slicer for the GRIS spectrograph at GREGOR
Author(s): N. Vega Reyes; M. A. Esteves; J. Sánchez-Capuchino; Y. Salaun; R. L. López; F. Gracia; P. Estrada Herrera; C. Grivel; J. J. Vaz Cedillo; M. Collados
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Paper Abstract

An image slicer has been proposed for the Integral Field Spectrograph [1] of the 4-m European Solar Telescope (EST) [2] The image slicer for EST is called MuSICa (Multi-Slit Image slicer based on collimator-Camera) [3] and it is a telecentric system with diffraction limited optical quality offering the possibility to obtain high resolution Integral Field Solar Spectroscopy or Spectro-polarimetry by coupling a polarimeter after the generated slit (or slits). Considering the technical complexity of the proposed Integral Field Unit (IFU), a prototype has been designed for the GRIS spectrograph at GREGOR telescope at Teide Observatory (Tenerife), composed by the optical elements of the image slicer itself, a scanning system (to cover a larger field of view with sequential adjacent measurements) and an appropriate re-imaging system. All these subsystems are placed in a bench, specially designed to facilitate their alignment, integration and verification, and their easy installation in front of the spectrograph. This communication describes the opto-mechanical solution adopted to upgrade GRIS while ensuring repeatability between the observational modes, IFU and long-slit. Results from several tests which have been performed to validate the opto-mechanical prototypes are also presented.

Paper Details

Date Published: 22 July 2016
PDF: 20 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99125P (22 July 2016); doi: 10.1117/12.2232615
Show Author Affiliations
N. Vega Reyes, Instituto de Astrofísica de Canarias (Spain)
M. A. Esteves, Instituto de Astrofísica de Canarias (Spain)
J. Sánchez-Capuchino, Instituto de Astrofísica de Canarias (Spain)
Y. Salaun, Winlight Optics (France)
R. L. López, Instituto de Astrofísica de Canarias (Spain)
F. Gracia, Instituto de Astrofísica de Canarias (Spain)
P. Estrada Herrera, Univ. de La Laguna (Spain)
C. Grivel, Instituto de Astrofísica de Canarias (Spain)
J. J. Vaz Cedillo, Instituto de Astrofísica de Canarias (Spain)
M. Collados, Instituto de Astrofísica de Canarias (Spain)
Univ. de La Laguna (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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