Telescope birefringence and phase errors in the Gravity instrument at the VLT interferometer - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2014

Telescope birefringence and phase errors in the Gravity instrument at the VLT interferometer

Résumé

We use a numerical model of the birefringence in the VLT Interferometer (VLTI) and the Gravity instrument to study the astrometric phase errors that arise when two conditions are simultaneously present: differential birefringence between two VLTI arms, and different polarizations of the science and fringe tracker sources. We present measurements of the VLTI birefringence, that are used to validate our model. We show how a suitable alignment of the eigenvectors of the optical train eliminates the phase error.
Fichier non déposé

Dates et versions

hal-03743290 , version 1 (02-08-2022)

Identifiants

Citer

Bernard Lazareff, Nicolas Blind, L. Jocou, Frank Eisenhauer, Karine Perraut, et al.. Telescope birefringence and phase errors in the Gravity instrument at the VLT interferometer. Optical and Infrared Interferometry IV, Jun 2014, Montréal, Quebec, Canada. ⟨10.1117/12.2056304⟩. ⟨hal-03743290⟩
7 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More