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Proceedings Paper

VPHGs abused
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Paper Abstract

The introduction of high efficiency Volume Phase Holographic Gratings (VPHGs) in astronomy led to a double think about instrumentation. Old instruments await miracles and new instrumentations are in search of a different look. Indeed the non conventional uses of dispersing elements can open new possibilities in instrumentation design. Counterdispersing couples of VPHGs are best suitable for narrow and medium band filtering. Their easy handling and macro movements will allow also a tunability of the filtering which promises good performances and robust control system. Multiplication or cascades of this principle will lead to the design of complex multi-imaging instrumentations. Also multi order spectroscopy can take advantage of VPHG smart positioning. Slanting and multilayers in their manufacturing as well as optimized optical geometries can be exploited in order to reach high performance, large spectral coverage spectrographs. We present here a set of concepts which can be applicated to very generation of astronomical instrumentations.

Paper Details

Date Published: 27 June 2006
PDF: 8 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62695N (27 June 2006); doi: 10.1117/12.671343
Show Author Affiliations
Emilio Molinari, INAF-Osservatorio Astronomico di Brera (Italy)
Andrea Bianco, INAF-Osservatorio Astronomico di Brera (Italy)
Materiali e Ing. Chimica G. Natta (Italy)
Paolo Conconi, INAF-Osservatorio Astronomico di Brera (Italy)
Giuseppe Crimi, INAF-Osservatorio Astronomico di Brera (Italy)
Vincenzo De Caprio, INAF-Osservatorio Astronomico di Brera (Italy)
Alberto Riva, INAF-Osservatorio Astronomico di Brera (Italy)
Marco Riva, INAF-Osservatorio Astronomico di Brera (Italy)
Matteo Tintori, INAF-Osservatorio Astronomico di Brera (Italy)
Giorgio Toso, INAF-Osservatorio Astronomico di Brera (Italy)
Materiali e Ing. Chimica G. Natta (Italy)
Filippo Maria Zerbi, INAF-Osservatorio Astronomico di Brera (Italy)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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