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Proceedings Paper

New over-octave VPHG architecture for DOLORES spectrograph at TNG
Author(s): Alessio Zanutta; Paola Galli; Vania Lorenzi; Emilio Molinari; Marco Landoni; Chiara Righi; Andrea Bianco
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Paper Abstract

Specific astronomical science cases could take advantage of VPHG devices with design and features tailored for achieving the best performances. The manufacturing process require materials where it is possible to precisely control the efficiency response, specially in complex optical designs, where the realization tolerances have to be strictly fulfilled. In this paper, we present an innovative design for the DOLORES spectrograph @ TNG as an example of complex VPHG (in GRISM mode) based on photopolymers. This dispersing element and its prisms were designed to cover, with low R, more than one octave and to disentangle 1st and 2nd diffraction orders avoiding the typical contamination. The ok-sky results are finally presented.

Paper Details

Date Published: 10 July 2018
PDF: 8 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107064W (10 July 2018); doi: 10.1117/12.2311322
Show Author Affiliations
Alessio Zanutta, INAF - Osservatorio Astronomico di Brera (Italy)
Paola Galli, Politecnico di Milano (Italy)
Vania Lorenzi, Fundación Galileo Galilei - INAF (Spain)
Emilio Molinari, Fundación Galileo Galilei - INAF (Spain)
INAF - Osservatorio Astronomico di Cagliari (Italy)
Marco Landoni, INAF - Osservatorio Astronomico di Brera (Italy)
Chiara Righi, Univ. degli Studi dell'Insubria (Italy)
Andrea Bianco, INAF - Osservatorio Astronomico di Brera (Italy)

Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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