EADS Astrium Nulling Interferometer Breadboard for DARWIN and GENIE

Details EADS Astrium Nulling Interferometer Breadboard for DARWIN and GENIE EADS Astrium Nulling Interferometer Breadboard for DARWIN and GENIE

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.554..223e&link_type=abstract

In: Proceedings of the 5th International Conference on Space Optics (ICSO 2004), 30 March - 2 April 2004, Toulouse, France. Ed.:

Astronomy and Astrophysics

Astronomy

2

Optical Instruments, Space Science, Astronomy, Darwin

Scientific paper

Within the context of the ESA TRP programme for DARWIN, a Nulling Interferometer Breadboard for the Near-Infrared was developed and tested. Its basic principle is recombining two light beams relying on a highly symmetric optical design (autobalanced Sagnac Core). Two different star simulators have been implemented, based on a) amplitude division and b) on wavefront division. The required achromatic Pi phase shift was implemented using a) dispersive phase shifter, and b) periscopes (geometrical pupil and field rotation). Due to the extremely symmetric optical design, very good star suppression up to 400000 has been achieved. OPD control better than 1 nm RMS has been demonstrated over hours.

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