Computer Science – Performance
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007lyot.confe..27g&link_type=abstract
Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21s
Computer Science
Performance
Scientific paper
In the context of extrasolar planet, a lot of technical solutions have been proposed to remove the stellar light. However, these solutions are limited by the phase errors of the incoming beam. Correction or calibration of the wavefront are then necessary to overcome this limitation. We will present the principle and simulations of a new imaging method used to calibrate and remove all the residual speckles introduced by wavefront errors. This technique called a Self-Coherent Camera (SCC, Baudoz et al. 2006) is a new type of simultaneous differential imaging technique based on the incoherence between the star and its companion lights. The residual speckles are encoded in the recorded image using interference fringes. A dedicated data processing removes the residual speckles from the image. Firstly, we will explain how the SCC can solve the quasi-static speckles limitation. Secondly, we will expose the simulated SCC performance using current adaptive optic and telescope specifications. Finally, we will analyze the performance that can be reached associating the SCC and a coronagraph.
Baudoz Pi.
Galicher Rapha"l.
Rousset Gabriel
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