Coronagraphic amplitude and phase correction for detecting planets.

Details Coronagraphic amplitude and phase correction for detecting planets. Coronagraphic amplitude and phase correction for detecting planets.

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.3404w&link_type=abstract

American Astronomical Society Meeting 202, #34.04; Bulletin of the American Astronomical Society, Vol. 35, p.748

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Scientific paper

Detection of earth-like planets around other stars using coronagraphy requires the optical beam into the coronagraph to be extremely uniform in both phase and amplitude. Errors in phase can be corrected using a deformable mirror, and errors in amplitude can be corrected using a spatial light modulator, both in the pupil plane. These corrections can be combined using a Michelson interferometer. If amplitude corrections of only a few percent range are needed, the required accuracy of 10-4 can be obtained with spatial light modulators with the modest dynamic range of 8 bits.

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