Development of a wavefront correction system for the SPICA coronagraph instrument

Takayuki Kotani; Keigo Enya; Takao Nakagawa; Lyu Abe; Kanae Haze; Shin Higuchi; Yoshio Tange

doi:10.1117/12.857083

10 August 2010 Development of a wavefront correction system for the SPICA coronagraph instrument

Takayuki Kotani, Keigo Enya, Takao Nakagawa, Lyu Abe, Kanae Haze, Shin Higuchi, Yoshio Tange

Proceedings Volume 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave; 77314F (2010) https://doi.org/10.1117/12.857083
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

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.

Citation Download Citation

Takayuki Kotani, Keigo Enya, Takao Nakagawa, Lyu Abe, Kanae Haze, Shin Higuchi, and Yoshio Tange "Development of a wavefront correction system for the SPICA coronagraph instrument", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77314F (10 August 2010); https://doi.org/10.1117/12.857083

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