Phase diversity in an exo-planet imager

Details Phase diversity in an exo-planet imager Phase diversity in an exo-planet imager

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5905..322g&link_type=abstract

Techniques and Instrumentation for Detection of Exoplanets II. Edited by Coulter, Daniel R. Proceedings of the SPIE, Volume 590

Physics

Optics

Scientific paper

A possible system for imaging an exo-planet uses a telescope, coronagraphic mask, and Lyot stop. However, the optics must be nearly flawless for a planet to be imaged, since imperfections cause the image to have speckles which mask the planet. The speckle pattern can be suppressed by removing its phase with an adaptive optic and by reimaging it through a lens with a small, central obscuration. We show how phase diversity can be used to determine the phase.

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