On-sky Testing of the Active Phasing Experiment

Bibcode
2009Msngr.136...25G
Gonté, Frédéric; Araujo, Constanza; Bourtembourg, Reynald; Brast, Roland; Derie, Frédéric; Duhoux, Philippe; Dupuy, Christophe; Frank, Christophe; Karban, Robert; Mazzoleni, Ruben; Noethe, Lothar; Sedghi, Babak; Surdej, Isabelle; Yaitskova, Natalia; Luong, Bruno; Chueca, Sergio; Reyes, Marcos; Esposito, Simone; Pinna, Enrico; Puglisi, Alfio; Quiros Pacheco, Fernando; Dohlen, Kjetil; Vigan, Arthur
Bibliographical reference

The Messenger, vol. 136, p. 25-31

Advertised on:
6
2009
Number of authors
23
IAC number of authors
2
Citations
13
Refereed citations
6
Description
The Active Phasing Experiment (APE) has been used by ESO to gain experience in controlling segmented primary mirrors in preparation for the European Extremely Large Telescope. The experiment tested various phasing techniques and explored their advantages and limitations. Four optical phasing sensors were developed using different techniques — a curvature sensor, a pyramid sensor, a Shack-Hartmann sensor and a sensor based on a modified Mach-Zehnder interferometer. The design of the APE instrument is described. APE was installed at the VLT visitor focus for on-sky testing and a brief summary of the results of the experiment is given.
Type
Non-refereed

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