MEGARA: high-precision alignment system for gluing fibers and microlenses

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

doi:10.1117/12.2232620

22 July 2016 MEGARA: high-precision alignment system for gluing fibers and microlenses

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

Author Affiliations +

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99125L (2016) https://doi.org/10.1117/12.2232620
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

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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, and R. Cedazo "MEGARA: high-precision alignment system for gluing fibers and microlenses", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99125L (22 July 2016); https://doi.org/10.1117/12.2232620

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