Skip to Main content Skip to Navigation

Application of Mach-Zehnder interferometer for co-phasing extremely large telescopes

Abstract : Segmentation seems to be the unique solution for Extremely Large Telescopes (ELTs). In order to achieve the high performance required for the astronomical science programs, the errors due to segment misalignment must be reduced to tens of nm. Therefore the development of new co-phasing techniques in highly segmented mirror is of critical importance. In this thesis we developed a new technique for co-phasing segmented mirrors based on a Mach-Zehnder interferometer with spatial filter in one arm. Atmospheric turbulence is tolerated in this setup if the spatial filter has similar size to that of the seeing disk. The study has been split in three levels, analytical, simulation and experimental. The performance of this technique has been analysed for realistic cases including the edge defects, gaps, photon noise and detection parameters. A comparison of three co-phasing techniques is also presented. This technique seems to be one of the strongest candidates for co-phasing of ELTs.
Complete list of metadata
Contributor : Luzma Montoya-Martinez <>
Submitted on : Tuesday, October 4, 2005 - 10:42:49 AM
Last modification on : Thursday, July 25, 2019 - 4:34:12 PM
Long-term archiving on: : Friday, April 2, 2010 - 10:13:59 PM


  • HAL Id : tel-00010384, version 1



Luzma Montoya-Martinez. Application of Mach-Zehnder interferometer for co-phasing extremely large telescopes. Astrophysics [astro-ph]. Université de Provence - Aix-Marseille I, 2004. English. ⟨tel-00010384⟩



Record views


Files downloads