SPIRou @ CFHT: spectrograph optical design

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DOIResolve DOI: http://doi.org/10.1117/12.926697
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Proceedings titleGround-based and Airborne Instrumentation for Astronomy IV
Series titleProceedings of SPIE; Volume 8446
ConferenceGround-Based and Airborne Instrumentation for Astronomy IV, July 1-6, 2012, Amsterdam, Netherlands
ISSN0277-786X
ISBN9780819491473
Article number844630
SubjectCFHT; Echelle gratings; High precision; Near-IR; Spectropolarimetry; Astronomy; Cryogenics; Diffraction gratings; Infrared devices; Instruments; Spectrographs
AbstractSPIRou 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.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21270307
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Record identifiera16efb8e-050e-42ee-9baf-f7c0b700a3ac
Record created2014-01-23
Record modified2016-05-09
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