
Proceedings Paper
Bulk silica transmission grating made by reactive ion etching for NIR space instrumentsFormat | Member Price | Non-Member Price |
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Paper Abstract
A GRISM, made of a grating on a prism, allow combining image and spectroscopy of the same field of view with the
same optical system and detector, thus simplify instrument concept. New GRISM designs impose technical
specifications difficult to reach with classical grating manufacturing processes: large useful aperture (>100mm), low
groove frequency (<30g/mm), small blaze angle (<3°) and, last but not least, line curvature allowing wavefront
corrections. In addition, gratings are commonly made of resin which may not be suitable to withstand the extreme space
environment. Therefore, in the frame of a R&D project financed by the CNES, SILIOS Technologies developed a new
resin-free grating manufacturing process and realized a first 80mm diameter prototype optically tested at LAM. We
present detailed specifications of this resin-free grating, the manufacturing process, optical setups and models for optical
performance verification and very encouraging results obtained on the first 80mm diameter grating prototype: >80%
transmitted efficiency, <30nm RMS wavefront error, groove shape and roughness very close to theory and uniform over
the useful aperture.
Paper Details
Date Published: 7 August 2014
PDF: 15 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91511F (7 August 2014); doi: 10.1117/12.2055095
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: 15 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91511F (7 August 2014); doi: 10.1117/12.2055095
Show Author Affiliations
Amandine Caillat, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Sandrine Pascal, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Stéphane Tisserand, Silios Technologies (France)
Kjetil Dohlen, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Sandrine Pascal, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Stéphane Tisserand, Silios Technologies (France)
Kjetil Dohlen, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Robert Grange, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Vincent Sauget, Silios Technologies (France)
Sophie Gautier, Silios Technologies (France)
Vincent Sauget, Silios Technologies (France)
Sophie Gautier, Silios Technologies (France)
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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