Bibcode
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
Referencia bibliográfica
The Messenger, vol. 136, p. 25-31
Advertised on:
6
2009
Número de citas
13
Número de citas referidas
6
Descripción
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.