Sarlette, Alain[Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes et modélisation >]
Surdej, Jean[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Tarmoul, Nassima[Lab. H. FIZEAU, Observatoire de la Côte d'Azur (France)]
Tatulli, Eric[Lab. d'Astrophysique de Grenoble (France)]
Vincent, Lionel[Lab. d'Astrophysique de Grenoble (France) and GIPSA-Lab (France)]
Jul-2010
Optical and Infrared Interferometry II
Danchi, W. C.
Delplancke, F.
Rajagopal, J. K.
SPIE
Proceedings of the SPIE, volume 7734
24.1-24.12
No
International
Bellingham
WA, USA
Astronomical Telescopes and Instrumentation 2010: Optical and Infrared Interferometry II
27/06/2010 - 2/07/2010
SPIE
San Diego
CA, USA
[en] In a few years, the second generation instruments of the Very Large Telescope Interferometer (VLTI) will routinely provide observations with 4 to 6 telescopes simultaneously. To reach their ultimate performance, they will need a fringe sensor capable to measure in real time the randomly varying optical paths differences. A collaboration between LAOG (PI institute), IAGL, OCA and GIPSA-Lab has proposed the Planar Optics Phase Sensor concept to ESO for the 2[SUP]nd[/SUP] Generation Fringe Tracker. This concept is based on the integrated optics technologies, enabling the conception of extremely compact interferometric instruments naturally providing single-mode spatial filtering. It allows operations with 4 and 6 telescopes by measuring the fringes position thanks to a spectrally dispersed ABCD method. We present here the main analysis which led to the current concept as well as the expected on-sky performance and the proposed design.
[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
