SPIRou @ CFHT: Spectrograph Optical Design

被引:17
|
作者
Thibault, Simon [1 ]
Rabou, Patrick [5 ]
Donati, Jean-Francois [2 ]
Desaulniers, Pierre [1 ]
Dallaire, Xaviel [1 ]
Artigau, Etienne [4 ]
Pepe, Francesco [3 ]
Micheau, Yoan [2 ]
Vallee, Phillippe [4 ]
Pepe, Francesco [3 ]
Barrick, Gregory A. [6 ]
Reshetov, Vladimir A. [3 ]
Hernandez, Olivier [4 ]
Saddlemyer, Les [3 ]
Pazder, John [3 ]
Pares, Laurent P. [2 ]
Doyon, Rene [4 ]
Delfosse, Xavier [5 ]
Kouach, Driss [2 ]
Loop, David [3 ]
机构
[1] Univ Laval, COPL, 2325 Rue Univ, Quebec City, PQ G1V 0A6, Canada
[2] Inst Rech Astrophys & Planetol, F-31400 Toulouse, France
[3] Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada
[4] Univ Montreal, Dept phys, Montreal, PQ H3C 3J7, Canada
[5] Domaine Univ, Inst Planetol & Astrophys Grenoble, F-38400 St Martin Dheres, France
[6] Canada France Hawaii Telescope, Kamuela, HI 96743 USA
关键词
SPIRou; CFHT; spectropolarimetry; high precision velocimeter; near IR; optical design; cryogenic; echelle grating;
D O I
10.1117/12.926697
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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.
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页数:11
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