Paper 14145-243
Paper 14145-243
Both-side dark hole generation technique based on Speckle Area Nulling (SAN)
8 July 2026 • 17:30 - 19:00 CEST | Room B4-M3
Abstract
Wavefront sensing and control (WFSC) is one of the key techniques for high-contrast imaging of exoplanets, suppressing scattered stellar light caused by wavefront aberrations to generate a dark hole. Speckle Area Nulling (SAN) method is the WFSC technique that does not require an optical propagation model in the high contrast imaging system. We have been developing the enhanced SAN method that can generate dark holes on both sides in the focal plane using two wavefront control devices, such as deformable mirrors. As a result of numerical simulations, the proposed method successfully generated both-side dark holes and achieved the stellar suppression performance equivalent to that of one-side dark hole generated by the conventional SAN method.
Presenter
Kenta Yoneta
Tokyo Univ. of Agriculture and Technology (Japan)
Kenta Yoneta is an Assistant Professor at the Tokyo University of Agriculture and Technology. He received a PhD from Hokkaido University, Sapporo, Japan in 2022. He worked at the National Astronomical Observatory of Japan and the Japan Aerospace Exploration Agency as a postdoctoral fellow. He has been studying high-contrast imaging techniques for direct detection of Earth-like exoplanets.