Poster (Scientific congresses and symposiums)
Smart co-phasing system for segmented mirror telescopes
Simar, Juan Felipe; Stockman, Yvan; Surdej, Jean
2016SPIE Astronomical Telescopes + Instrumentation
 

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Keywords :
Adaptive; PSF; OTF; Optics; MTF; PTF; Active; Wavefront; Fourier
Abstract :
[en] One of the main challenges in space observations is to observe always fainter and more compact objects. This can be achieved by increasing the telescope diameters. So, increasing the primary mirror diameters of the telescopes is the challenge solution but it is technically impossible to manufacture monolithic mirrors larger than 10m in diameter. The use of segmented mirrors thus becomes mandatory. This paper describes the results of a light co-phasing setup mounted in laboratory. This setup is able to correct a piston from 200μm to 15 nm based on coarse (200μm to 300nm) and fine (300nm to 15nm) measurement methods. Both measurements are then chained in a feedback system in order to completely co-phase and keep the segments aligned.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Simar, Juan Felipe ;  Université de Liège > CSL (Centre Spatial de Liège)
Stockman, Yvan ;  Université de Liège > CSL (Centre Spatial de Liège)
Surdej, Jean  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
Smart co-phasing system for segmented mirror telescopes
Publication date :
30 June 2016
Number of pages :
114cm x 114cm
Event name :
SPIE Astronomical Telescopes + Instrumentation
Event date :
26 juin - 1 juillet 2016
Audience :
International
Available on ORBi :
since 22 June 2016

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