Development of the coherent differential imaging on speckle area nulling (CDI-SAN) method

Kenta Yoneta; Jun Nishikawa; Yutaka Hayano; Masatsugu Iribe; Kodai Yamamoto; Ryo Tsukui; Naoshi Murakami; Mizuki Asano; Hiromu Muramatsu; Yosuke Tanaka; Motohide Tamura; Takahiro Sumi; Toru Yamada; Olivier Guyon; Julien Lozi; Vincent Deo; Sébastien Vievard; Kyohoon Ahn

doi:10.1117/12.2676294

5 October 2023 Development of the coherent differential imaging on speckle area nulling (CDI-SAN) method

Kenta Yoneta, Jun Nishikawa, Yutaka Hayano, Masatsugu Iribe, Kodai Yamamoto, Ryo Tsukui, Naoshi Murakami, Mizuki Asano, Hiromu Muramatsu, Yosuke Tanaka, Motohide Tamura, Takahiro Sumi, Toru Yamada, Olivier Guyon, Julien Lozi, Vincent Deo, Sébastien Vievard, Kyohoon Ahn

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126800D (2023) https://doi.org/10.1117/12.2676294
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Various types of high-contrast imaging instruments have been proposed and developed for direct detection of exoplanets by suppressing nearby stellar light. Stellar speckles due to wavefront aberration can be suppressed by the appropriate wavefront control, called the dark hole control. However, the speckles, which fluctuate faster than the dark hole control due to atmospheric turbulence in ground-based telescopes or instrument deformation caused by temperature changes in space telescopes, cannot be suppressed by the control and remain in focal plane images. The Coherent Differential Imaging on Speckle Area Nulling (CDI-SAN) method was proposed to overcome such fast fluctuating speckles and detect exoplanetary light. We constructed an optical setup in a laboratory to demonstrate the CDI-SAN method. With the dark hole control and the CDI-SAN method, we achieved 10⁻⁸ level of contrasts.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kenta Yoneta, Jun Nishikawa, Yutaka Hayano, Masatsugu Iribe, Kodai Yamamoto, Ryo Tsukui, Naoshi Murakami, Mizuki Asano, Hiromu Muramatsu, Yosuke Tanaka, Motohide Tamura, Takahiro Sumi, Toru Yamada, Olivier Guyon, Julien Lozi, Vincent Deo, Sébastien Vievard, and Kyohoon Ahn "Development of the coherent differential imaging on speckle area nulling (CDI-SAN) method", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126800D (5 October 2023); https://doi.org/10.1117/12.2676294

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