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- W2041969356 abstract "The Active Phasing Experiment (APE) was designed to test four different phasing techniques and to validate wavefront control concepts for Extremely Large Telescopes. One of the sensors is the ZErnike Unit for Segment phasing (ZEUS), which was successfully tested on-sky along with the rest of the APE experiment at one of the Nasmyth platforms of the Very Large Telescope (VLT) in 2009. During the four observing campaigns, multiple results were obtained in open-loop and in closed-loop at different wavelengths. We present in this paper an analysis of the multi-wavelength data in terms of piston measurement precision at the edges of the segments and on the reconstructed wavefront, and an analysis of the evolution of these errors in successive closed-loop runs at different wavelengths. This work demonstrates how the applied multi-wavelength algorithm leads to convergence, allowing phasing of segments with piston errors of several microns." @default.
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- W2041969356 date "2010-07-16" @default.
- W2041969356 modified "2023-10-17" @default.
- W2041969356 title "On-sky results of the ZEUS phasing sensor, closed-loop precision in the context of multi-wavelength measurements" @default.
- W2041969356 doi "https://doi.org/10.1117/12.857142" @default.
- W2041969356 hasPublicationYear "2010" @default.
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