Fringe-tracking experiments at the IOTA interferometer

Sebastien Morel; Wesley A. Traub; Jesse D. Bregman; Robert W. Mah; Edward Wilson

doi:10.1117/12.390247

5 July 2000 Fringe-tracking experiments at the IOTA interferometer

Sebastien Morel, Wesley A. Traub, Jesse D. Bregman, Robert W. Mah, Edward Wilson

Proceedings Volume 4006, Interferometry in Optical Astronomy; (2000) https://doi.org/10.1117/12.390247
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

The first tests of an infrared fringe-tracker prototype for the IOTA interferometer (Mount-Hopkins, Arizona) were carried out during 1999. The aim of this real-time system is to minimize the optical path difference (OPD) fluctuations between the two beams such that interference fringes (obtained in J, K, or L band) can always be observed within the `scan window' given by the instrument. After an introduction of the employed technology (hardware and software), we present results obtained from star observations. Finally, we discuss the possibility of improving the fringe-tracker by prediction of the OPD, using statistical properties of its fluctuations. The improvement of the fringe-tracker already existing for the FLUOR recombiner is discussed as well.

Citation Download Citation

Sebastien Morel, Wesley A. Traub, Jesse D. Bregman, Robert W. Mah, and Edward Wilson "Fringe-tracking experiments at the IOTA interferometer", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); https://doi.org/10.1117/12.390247

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