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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 710177.0, MPI für Astronomie / Publikationen_mpia
Telescope birefringence and phase errors in the Gravity instrument at the VLT interferometer
Authors:Lazareff, B.; Blind, N.; Jocou, L.; Eisenhauer, F.; Perraut, K.; Lacour, S.; Delplancke, F.; Schoeller, M.; Amorim, A.; Brandner, W.; Perrin, G.; Straubmeier, C.
Place of Publication:Bellingham, Wash.
Publisher:SPIE
Date of Publication (YYYY-MM-DD):2014
Audience:Not Specified
Abstract / Description: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.
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISBN:9780819496140
URL:http://cdsads.u-strasbg.fr/abs/2014SPIE.9146E..0XL
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