MEGARA. High-precision alignment system for gluing fibers and microlenses



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Gil de Paz, Armando (2016) MEGARA. High-precision alignment system for gluing fibers and microlenses. In Advacnes in optical and mechanical technologies for telescopes and instrumentation II. Conference Proceedings, 9912 . SPIE-Iint. Soc. Optical Engineering. ISBN 978-1-5106-0203-8

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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.

Item Type:Book Section
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© 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).

Uncontrolled Keywords:Megara; Integral field unit (IFU); Multi-object spectrograph (MOS); Fiber bundles; Fiber and microlens gluing station; High precision alignment; Fiber-to-fiber flux homogneneity; GTC
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:62891
Deposited On:30 Oct 2020 11:18
Last Modified:30 Oct 2020 11:18

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