Dispersed fringe tracking with the multi-ro apertures of the Grand Interferometre a 2 Telescopes

Details Dispersed fringe tracking with the multi-ro apertures of the Grand Interferometre a 2 Telescopes Dispersed fringe tracking with the multi-ro apertures of the Grand Interferometre a 2 Telescopes

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apopt..35.3002k&link_type=abstract

Applied Optics, Volume 35, Issue 16, June 1, 1996, pp.3002-3009

Physics

Optics

20

Astronomical Optics, Coherence And Statistical Optics, Fringe Analysis, Image Processing, Imaging Systems, Instrumentation: Measurement: And Metrology, Interferometry, Photon Counting, Telescopes

Scientific paper

A new fringe tracker based on photon-counting detectors and real-time image processing has been implemented on the Grand Interferometre a 2 Telescopes at the Observatoire de la Cote d'Azur. Fringe visibilities have been recorded on P Cygni and other stars across the H alpha emission line with optical path differences stabilized to between 4 and 7 mu m rms (1% of the coherence length). We present our initial results and describe the principle, implementation, and performance of the fringe tracker. tracking.

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