# Fourth-order Coronagraph for High-Contrast Imaging of Exoplanets with Off-axis Segmented Telescopes

18 Mar 2020 Itoh Satoshi Matsuo Taro

We propose a coronagraphic system with fourth-order null for off-axis segmented telescopes, which is sufficiently insensitive to the telescope pointing errors and finite angular diameter of the host star to enable high-contrast imaging of potentially habitable planets. The inner working angle of the coronagraphic system is close to $1\lambda/D$, and there is no outer limit... (read more)

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• INSTRUMENTATION AND METHODS FOR ASTROPHYSICS
• EARTH AND PLANETARY ASTROPHYSICS