4 August 2016 Performance of MEGARA spectrograph optical elements
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Abstract
MEGARA is the new IFU and multiobject spectrograph for Gran Telescopio Canarias. The spectograph will offer spectral resolution Rfwhm~ 6,000, 12,000 and 18,700. Except for the optical fibers and microlenses, the complete MEGARA optical system has been manufactured in Mexico. This includes a field lens, a 5-lenses collimator, a 7-lenses camera and a complete set of volume phase holographic gratings with 36 flat windows and 24 prisms. All these elements are very large and complex, with very efficient antireflection coatings. Here the optical performance of MEGARA collimator and camera lenses and the field lens is presented.
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E. Carrasco, E. Carrasco, G. Páez, G. Páez, R. Izazaga, R. Izazaga, J. de la Luz Hurtado, J. de la Luz Hurtado, C. Pérez, C. Pérez, F. Granados, F. Granados, D. Aguirre, D. Aguirre, E. Percino, E. Percino, J. Reyes, J. Reyes, A. Gil de Paz, A. Gil de Paz, J. Gallego, J. Gallego, J. Iglesias, J. Iglesias, } "Performance of MEGARA spectrograph optical elements", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990885 (4 August 2016); doi: 10.1117/12.2232208; https://doi.org/10.1117/12.2232208
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