Gil De Paz, Armando2023-06-182023-06-182016-07-22978-1-5106-0203-810.1117/12.2232620https://hdl.handle.net/20.500.14352/19564© 2016 SPIE. Artículo firmado por 14 autores & MEGARA Team. Conference on Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II (2016. Edimburgh/UK).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.engbook parthttp://dx.doi.org/10.1117/12.2232620https://www.spiedigitallibrary.org/open access52MegaraIntegral field unit (IFU)Multi-object spectrograph (MOS)Fiber bundlesFiber and microlens gluing stationHigh precision alignmentFiber-to-fiber flux homogneneityGTCAstrofísicaAstronomía (Física)