Translator Disclaimer
24 September 2012 SPIRou @ CFHT: spectrograph optical design
Author Affiliations +
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) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.


The new SOXS instrument for the ESO NTT
Proceedings of SPIE (August 09 2016)
Optical design of the SOXS spectrograph for ESO NTT
Proceedings of SPIE (July 06 2018)
Optical design of the ESPRESSO spectrograph at VLT
Proceedings of SPIE (July 14 2010)
The optical design of the X-shooter for the VLT
Proceedings of SPIE (June 30 2006)

Back to Top