SPIRou @ CFHT: spectrograph optical design
| Autor: | Simon Thibault, Patrick Rabou, Jean-Francois Donati, Pierre Desaulniers, Xavier Dallaire, Etienne Artigau, Francesco Pepe, Yoan Micheau, Philippe Vallée, Greg Barrick, Vlad Reshetov, Olivier Hernandez, Leslie Saddlemyer, John Pazder, Laurent P. Parès, Rene Doyon, Xavier Delfosse, Driss Kouach, David Loop |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Infrared devices
Cryogenics Astronomy CFHT Astrophysics::Cosmology and Extragalactic Astrophysics Grating law.invention Telescope High precision Optics law Spectrographs Astrophysics::Solar and Stellar Astrophysics Spectrograph Astrophysics::Galaxy Astrophysics Echelle grating Physics business.industry Near-infrared spectroscopy Detector Astrophysics::Instrumentation and Methods for Astrophysics Cassegrain reflector Lens (optics) Echelle gratings Diffraction gratings Near-IR Astrophysics::Earth and Planetary Astrophysics business Spectropolarimetry Instruments |
| DOI: | 10.1117/12.926697 |
| Popis: | SPIRou is a near-infrared, echelle spectropolarimeter/velocimeter under design for the 3.6m Canada-France-Hawaii Telescope (CFHT) on Mauna Kea, Hawaii. The unique scientific capabilities and technical design features are described in the accompanying (eight) papers at this conference. In this paper we focus on the lens design of the optical spectrograph. The SPIROU spectrograph is a near infrared fiber fed double pass cross dispersed spectrograph. The cryogenic spectrograph is connected with the Cassegrain unit by the two science fibers. It is also fed by the fiber coming from the calibration box and RV reference module of the instrument. It includes 2 off-axis parabolas (1 in double pass), an echelle grating, a train of cross disperser prisms (in double pass), a flat folding mirror, a refractive camera and a detector. This paper describes the optical design of the spectrograph unit and estimates the performances. In particular, the echelle grating options are discussed as the goal grating is not available from the market. © 2012 SPIE. Ground-Based and Airborne Instrumentation for Astronomy IV, July 1-6, 2012, Amsterdam, Netherlands Series: Proceedings of SPIE |
| Databáze: | OpenAIRE |
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