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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.01 Contributi in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29411
Title: The AIV concept of SHARK-NIR, a new coronagraph for the Large Binocular Telescope
Authors: MARAFATTO, Luca 
BERGOMI, Maria 
BIONDI, FEDERICO 
CAROLO, ELENA 
CHINELLATO, SIMONETTA 
DE PASCALE, Marco 
DIMA, MARCO 
FARINATO, JACOPO 
GREGGIO, DAVIDE 
LESSIO, Luigi 
MAGRIN, DEMETRIO 
PORTALURI, ELISA 
RAGAZZONI, Roberto 
Vassallo, Daniele 
VIOTTO, VALENTINA 
Issue Date: 2018
Volume: Ground-based and Airborne Instrumentation for Astronomy VII
Editors: Evans, Christopher J.; Simard, Luc; Takami, Hideki
Series: PROCEEDINGS OF SPIE 
Number: 10702
First Page: 107024C
Abstract: SHARK-NIR is one of the forthcoming instruments of the Large Binocular Telescope second generation instruments. Due to its coronagraphic nature, coupled with low resolution spectroscopy capabilities, it will be mainly devoted to exoplanetary science, but its FoV of 18 x 18 arcsec and very high contrast imaging capabilities will allow to exploit also other intriguing scientific cases. The instrument has been conceived and designed to fully exploit the exquisite adaptive optics correction delivered by the FLAO module, which will be improved with the SOUL upgrade, and will implement different coronagraphic techniques, with contrast as high as 10-6 up to 65 mas from the star. Despite the wavelength range of SHARK-NIR is 0.96-1.7 um, the instrument is designed to work in synergy with SHARK-VIS and with LMIRcam, on board of LBTI. The contemporary acquisition from these instruments will extend the wavelength coverage from M band down to the visible radiation. The physical location of the instrument, at the entrance of LBTI, imposes dimensional constraints to the instrument, which had been kept very compact. The folded optical design includes more than 50 optical elements, among which 4 Off-Axis Parabolas, 1 Deformable Mirror for the compensation of the Non Common Path Aberrations from the FLAO Wavefront Sensor, 2 detectors and 3 different kinds of coronagraph: Gaussian Lyot, Shaped Pupil and Four Quadrant Pupil Mask. Most of these optics are located onto an optical bench 500 x 400 mm, which makes SHARK-NIR an extremely dense instrument. This, together with the presence of 4 off-axis parabolas and of coronagraphs, such as the Four Quadrant, poorly tolerant to misalignments, requires a careful alignment and test phase, which needs the fine adjustement of many hundreds of degrees of freedom. We will give here an overview of the opto-mechanical layout of SHARK-NIR and of the identified alignment procedure, mostly optical, planned to take place in 2018.
Conference Name: Ground-based and Airborne Instrumentation for Astronomy VII
Conference Place: Austin, Texas, United States
Conference Date: 10-15 June, 2018
URI: http://hdl.handle.net/20.500.12386/29411
URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10702/2314250/The-AIV-concept-of-SHARK-NIR-a-new-coronagraph-for/10.1117/12.2314250.full?SSO=1
ISSN: 0277-786X
ISBN: 9781510619579
9781510619586
DOI: 10.1117/12.2314250
Bibcode ADS: 2018SPIE10702E..4CM
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

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