
Proceedings Paper
On-sky tests of an A/R coated silicon grism on board NICS at TNGFormat | Member Price | Non-Member Price |
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Paper Abstract
We present the results of our project for the design and construction and on-sky test of silicon
grisms. The fabrication of such devices is a complex and critical process involving litho-masking,
anisotropic etching and direct bonding techniques. After the successful fabrication of the silicon
grating, we have optimized the bonding of the grating onto the hypotenuse of a silicon prism to get
the final prototype. After some critical phases during the experimentation a silicon grism with 363
grooves/mm and a blaze angle of 14 degrees has been eventually fabricated. The application of an
A/R coating on both the surfaces has been the last step: this procedure is critical because of the
groove geometry of the diffraction grating, whose performace might be compromised by the
coating. Then, the grism was inserted in the filter wheel of the Near Infrared camera NICS, at the
focal plane of the National Galileo Telescope (TNG), the 3.5 m Italian facility in the Canary Islands
(E). The result of the on-sky tests are given in detail.
Paper Details
Date Published: 7 August 2014
PDF: 8 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91515B (7 August 2014); doi: 10.1117/12.2054916
Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)
PDF: 8 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91515B (7 August 2014); doi: 10.1117/12.2054916
Show Author Affiliations
F. Vitali, INAF - Osservatorio Astronomico di Roma (Italy)
V. Foglietti, Istituto di Struttura della Materia, CNR (Italy)
D. Lorenzetti, INAF - Osservatorio Astronomico di Roma (Italy)
E. Cianci, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
F. Ghinassi, Fundación Galileo Galilei - INAF (Spain)
V. Foglietti, Istituto di Struttura della Materia, CNR (Italy)
D. Lorenzetti, INAF - Osservatorio Astronomico di Roma (Italy)
E. Cianci, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
F. Ghinassi, Fundación Galileo Galilei - INAF (Spain)
A. Harutyunyan, Fundación Galileo Galilei - INAF (Spain)
S. Antoniucci, INAF - Osservatorio Astronomico di Roma (Italy)
C. Riverol, Fundación Galileo Galilei - INAF (Spain)
L. Riverol, Fundación Galileo Galilei - INAF (Spain)
S. Antoniucci, INAF - Osservatorio Astronomico di Roma (Italy)
C. Riverol, Fundación Galileo Galilei - INAF (Spain)
L. Riverol, Fundación Galileo Galilei - INAF (Spain)
Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)
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