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Proceedings Article

Design and performances of the Shack-Hartmann sensor within the Active Phasing Experiment

[+] Author Affiliations
R. Mazzoleni, F. Gonté, I. Surdej, C. Araujo, R. Brast, F. Derie, P. Duhoux, C. Dupuy, C. Frank, R. Karban, L. Noethe, N. Yaitskova

European Organisation for Astronomical Research in the Southern Hemisphere (Germany)

Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70123A (August 27, 2008); doi:10.1117/12.789375
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From Conference Volume 7012

  • Ground-based and Airborne Telescopes II
  • Larry M. Stepp; Roberto Gilmozzi
  • Marseille, France | June 23, 2008

abstract

The Shack-Hartmann Phasing Sensor (SHAPS) has been integrated in the Active Phasing Experiment (APE) at ESO. It is currently under test in the laboratory. The tests on sky are foreseen for the end of 2008, when APE will be mounted at the Nasmyth focus of one of the VLT unit telescopes. SHAPS is based on the Shack-Hartmann principle: the lenslet array is located in a plane which is optically conjugated to the Active Segmented Mirror (ASM) of APE and is composed of two types of microlenses, circular and cylindrical, which give information about the wavefront slope and the piston steps, respectively. This proceeding contains a description of SHAPS and of the algorithms implemented for the wavefront reconstruction and for the phasing. The preliminary results obtained during the laboratory tests are discussed and compared with the theoretical predictions. The performances of SHAPS at the VLT and at the European Extremely Large Telescope (E-ELT) are estimated.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

R. Mazzoleni ; F. Gonté ; I. Surdej ; C. Araujo ; R. Brast, et al.
"Design and performances of the Shack-Hartmann sensor within the Active Phasing Experiment", Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70123A (August 27, 2008); doi:10.1117/12.789375; http://dx.doi.org/10.1117/12.789375


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