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Proceedings Paper

Day-time local phasing of neighbouring segments of the E-ELT primary mirror, based simultaneous multi-λ shearing interferometry
Author(s): S. Leveque; C. Falldorf; R. Klattenhoff; A. Cheffot
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Paper Abstract

In the context of the segmented primary mirror of the E-ELT, the ability to measure the phasing state of neighbouring segments during day-time represents a way to mitigate the risk of potentially time consuming on-sky phasing after segment replacement. This paper presents the concept of a local phasing sensor based on simultaneous multi-wavelength shearing interferometry, as well as experimental results obtained on the ESO M1 test facility.

Paper Details

Date Published: 29 August 2016
PDF: 12 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99124G (29 August 2016); doi: 10.1117/12.2235241
Show Author Affiliations
S. Leveque, European Southern Observatory (Germany)
C. Falldorf, Bremer Institut für angewandte Strahltechnik GmbH (Germany)
R. Klattenhoff, Bremer Institut für angewandte Strahltechnik GmbH (Germany)
A. Cheffot, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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