Development of a wavefront correction system for the SPICA coronagraph instrument

Details Development of a wavefront correction system for the SPICA coronagraph instrument Development of a wavefront correction system for the SPICA coronagraph instrument

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7731e.143k&link_type=abstract

Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave. Edited by Oschmann, Jacobus M., Jr.; Clampin

Physics

Scientific paper

We present the laboratory demonstration of a wavefront correction system for the SPICA project. We have been developing SPICA Coronagraph Instrument (SCI) for exoplanet detection and characterization. SCI employs a wavefront correction system with a 1024-element deformable mirror. The laboratory experiments demonstrated that 106 dynamic ranges at 3.5 λ/D can be achieved after speckle nulling by using a DM at the He-Ne laser wavelength. We also started a wide-band wavefront correction experiment in the visible wavelengths. The combination of wide-band speckle nulling algorithm and a binary pupil mask will lead to a very wide-band, high contrast imaging system.

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