Optical and mechanical architecture for the E-ELT HIRES polarimeter

I. Di Varano; K. G. Strassmeier; M. Woche; M. Weber; U. Laux; S. Yuan; S. Covino; M. Riva; P. Di Marcantonio; M. Genoni; M. Landoni; G Li Causi; E. Mason

doi:10.1117/12.2272051

26 June 2017 Optical and mechanical architecture for the E-ELT HIRES polarimeter

I. Di Varano, K. G. Strassmeier, M. Woche, M. Weber, U. Laux, S. Yuan, S. Covino, M. Riva, P. Di Marcantonio, M. Genoni, M. Landoni, G Li Causi, E. Mason

Author Affiliations +

Proceedings Volume 10330, Modeling Aspects in Optical Metrology VI; 103300C (2017) https://doi.org/10.1117/12.2272051
Event: SPIE Optical Metrology, 2017, Munich, Germany

Abstract

We introduce the opto-mechanical architecture of a high precision, full Stokes vector, dual-channel polarimeter for the European Extremely Large Telescope’s High Resolution spectrograph (E-ELT HIRES). It is foreseen to feed two spectrograph modules simultaneously through the standard Front End subunit located on the Nasmyth platform via two fiber bundles; one optimized for the optical (BVRI), the other optimized for the infrared (zYJH) bands. The polarimeter is located below M4 in the f/4.4 intermediate focus, representing the only rotationally symmetric focus available, and is retractable. We illustrate the strategy of repositioning and aligning the instrument, provided that it has to withstand wind and earthquake loads and that the PSF is varying in width and position due to the active compensation by the co-phasing corrections. Preliminary results of its expected polarimetric sensitivity and accuracy are also analyzed for several configurations of M1 segments and suggest a stunning performance in the intermediate focus with cross talks of the order of 10^-7 but 10^-2 if it were located in the Nasmyth focus.

Citation Download Citation

I. Di Varano, K. G. Strassmeier, M. Woche, M. Weber, U. Laux, S. Yuan, S. Covino, M. Riva, P. Di Marcantonio, M. Genoni, M. Landoni, G Li Causi, and E. Mason "Optical and mechanical architecture for the E-ELT HIRES polarimeter", Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103300C (26 June 2017); https://doi.org/10.1117/12.2272051

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available