Co-phasing of a diluted aperture synthesis instrument for direct imaging

Author： Bouyeron L.   Delage L.   Baudoin R.   Gomes J. T.   Grossard L.   Reynaud F.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|567|issue|A87-A87

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.567, Iss.issue, 2014-07, pp. : A87-A87

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Amongst the new techniques currently developed for high-resolution and high-dynamics imaging, the hypertelescope architecture is very promising for direct imaging of objects such as exoplanets. The performance of this instrument strongly depends on the co-phasing process accuracy. In a previous high-flux experimental study with an eight-telescope array, we successfully implemented a co-phasing system based on the joint use of a genetic algorithm and a sub-aperture piston phase diversity using the object itself as a source for metrology.

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