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Spano P.,National institute for astrophysics | De Caprio V.,Istituto di Astrofisica Spaziale e Fisica Cosmica | La Foresta M.,University of La Laguna | Molinari E.,INAF TNG | And 6 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

A new mechanical interface between the telescope Nasmyth derotator and the focal plane instrumentation has been developed and built for the robotic REM telescope in La Silla. A light-weighted flange will substitute the existing one in order to improve performances in term of mechanical flexures. A new ghost-free, high performances, dichroic has been designed and installed inside the new mechanical flange, improving the efficiency of the wavelength splitting between the visible and the near-infrared channels. The visible camera has been completely redesigned in order to get simultaneous multi-band coverage within the existing 10'x10' field of view. Four bands will be observed onto the same 2kx2k, 13.5 micron pixel, detector. Band splitting is obtained with plate dichroics, working at 45 deg of incidence angle. It will allow to fast observe gamma-ray burst afterglow from the 400 nm up to 2.5 micron, to better characterize spectral features of these fastly evolving sources. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Molinari E.,INAF TNG | Daniela T.,National institute for astrophysics | Toso G.,National institute for astrophysics | Spano P.,National institute for astrophysics | And 9 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

The challenge of building extremely large telescope pushes forward the parallel ability to measure and test optical components of large sizes. Here we present the optical bench setup for the Demonstration Prototype (DP) of the voice coil controlled adaptive mirror M4AU of the E-ELT. A set of three devices has been chosen and used for the tests, whose results are also shown. The performance demonstrated that this is a viable and trusted technology and the DP tests were highly representative of the whole procedure that could be applied to the real, full size unit. © 2010 SPIE.


Cosentino R.,INAF TNG | Lovis C.,Observatoire de Geneva | Pepe F.,Observatoire de Geneva | Cameron A.C.,University of St. Andrews | And 16 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

The planet hunter HARPS-N[1], in operation at the Telescopio Nazionale Galileo (TNG)[13] from April 2012 is a highresolution spectrograph designed to achieve a very high radial velocity precision measurement thanks to an ultra stable environment and in a temperature-controlled vacuum. The main part of the observing time was devoted to Kepler field and achieved a very important result with the discovery of a terrestrial exoplanet. After two year of operation, we are able to show the performances and the results of the instrument. © 2014 SPIE.

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