Bibcode
Calcines, A.; Collados, M.; López, R. L.
Referencia bibliográfica
Highlights of Spanish Astrophysics VII, Proceedings of the X Scientific Meeting of the Spanish Astronomical Society (SEA), held in Valencia, July 9 - 13, 2012, Eds.: J.C. Guirado, L.M. Lara, V. Quilis, and J. Gorgas., pp.939-939
Advertised on:
5
2013
Número de citas
1
Número de citas referidas
1
Descripción
This communication presents a prototype image slicer for the 4-m
European Solar Telescope (EST) designed for the spectrograph of the
1.5-m GREGOR solar telescope (GRIS). The design of this integral field
unit has been called MuSICa (Multi-Slit Image slicer based on
collimator-Camera). It is a telecentric system developed specifically
for the integral field, high resolution spectrograph of EST and presents
multi-slit capability, reorganizing a bidimensional field of view of 80
arcsec^{2} into 8 slits, each one of them with 200 arcsec length ×
0.05 arcsec width. It minimizes the number of optical components needed
to fulfil this multi-slit capability, three arrays of mirrors: slicer,
collimator and camera mirror arrays (the first one flat and the other
two spherical). The symmetry of the layout makes it possible to overlap
the pupil images associated to each part of the sliced entrance field of
view. A mask with only one circular aperture is placed at the pupil
position. This symmetric characteristic offers some advantages:
facilitates the manufacturing process, the alignment and reduces the
costs. In addition, it is compatible with two modes of operation:
spectroscopic and spectro-polarimetric, offering a great versatility.
The optical quality of the system is diffraction-limited. The prototype
will improve the performances of GRIS at GREGOR and is part of the
feasibility study of the integral field unit for the spectrographs of
EST. Although MuSICa has been designed as a solar image slicer, its
concept can also be applied to night-time astronomical instruments
(Collados et al. 2010, Proc. SPIE, Vol. 7733, 77330H; Collados et al.
2012, AN, 333, 901; Calcines et al. 2010, Proc. SPIE, Vol. 7735, 77351X)