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Proceedings Paper

MEGARA: high-precision alignment system for gluing fibers and microlenses
Author(s): A. Pérez-Calpena; E. Sánchez-Blanco; I. Martínez-Delgado; M. L. García-Vargas; X. Arrillaga; H. Aube; A. Gil de Paz; M. Maldonado; J. Gallego; J. Iglesias-Páramo; E. Carrasco; F. M. Sánchez-Moreno; J. Vilchez; R. Cedazo
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Paper Abstract

MEGARA is the multi-object medium-resolution spectrograph for the GTC 10m telescope. MEGARA offers two observing modes, the LCB mode, a large central IFU; and a MOS mode composed by 92 robotic positioners carrying 7 fibers minibundles. Microlens are required to fit the GTC f/17 to the f/3 at the fiber entrance, where pupil image is oversized to have a fiber-to-fiber flux variation better than 10%. This tight requirement imposed manufacturing tolerances for the different components and required the development of a gluing station to provide a centering precision better than 5μm. We present the overview of the optical bundles, the gluing station and the final performance obtained during the integration and tests.

Paper Details

Date Published: 22 July 2016
PDF: 15 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99125L (22 July 2016); doi: 10.1117/12.2232620
Show Author Affiliations
A. Pérez-Calpena, FRACTAL S.L.N.E (Spain)
E. Sánchez-Blanco, FRACTAL S.L.N.E (Spain)
I. Martínez-Delgado, FRACTAL S.L.N.E (Spain)
M. L. García-Vargas, FRACTAL S.L.N.E (Spain)
X. Arrillaga, AVS (Spain)
H. Aube, SEDI ATI Fibres Optiques (France)
A. Gil de Paz, Univ. Complutense de Madrid (Spain)
M. Maldonado, FRACTAL S.L.N.E (Spain)
J. Gallego, SEDI ATI Fibres Optiques (Spain)
J. Iglesias-Páramo, Instituto de Astrofísica de Andalucía (Spain)
E. Carrasco, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
F. M. Sánchez-Moreno, Univ. Politécnica de Madrid (Spain)
J. Vilchez, Instituto de Astrofísica de Andalucía (Spain)
R. Cedazo, 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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