Paper 14145-283
Paper 14145-283
Two-stage coronagraph for low scattered light and improved phase resolution control
9 July 2026 • 17:30 - 19:00 CEST | Room B4-M3
Abstract
We propose a two-stage coronagraph for high-contrast imaging. The first stage, a Lyot mask coronagraph, reflects the light for tip-tilt control and eliminates most of the light, minimizing scattered light generated by downstream optical elements. The second stage is a vortex phase mask coronagraph equipped with two deformable mirrors. The attenuated electric field from the first stage effectively improves the phase resolution of the deformable mirrors, enabling higher contrast control than conventional single-stage systems.
Presenter
AstroBiology Ctr., NINS (Japan), National Astronomical Observatory of Japan (Japan), Hokkaido Univ. (Japan)
He received BS degree in 2000, MS degree in 2002, and PhD degree in 2005 from the Department of Applied Physics, Hokkaido University, Sapporo, Japan. Currently, he is a Lecturer of Astrobiology Center. His current research interests include developing future high-contrast imaging techniques such as phase-mask coronagraphy, nulling interferometry, and wavefront sensing and control for directly detecting and characterizing Earth-like exoplanets.