Optical Path Stability and Fringe Tracking in Optical Stellar Interferometry
نویسنده
چکیده
In this paper we analyze the problems of fringe pattern estimation in optical stellar interferometry that are associated with optical path errors. Our rst nding is that an optimal fringe tracking system must track with path length errors of less than about one-eighth of the coherence length. The second is that if phase closure estimation is to be achieved at the lowest possible light levels, the time scale of fringe wander must not be less than about 10% of the total observation time.
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