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ERIS is a diffraction limited thermal infrared imager and spectrograph forthe Very Large Telescope UT4. One of the science cases for ERIS is thedetection and characterization of circumstellar structures and exoplanetsaround bright stars that are typically much fainter than the stellardiffraction halo. Enhanced sensitivity is provided through the combination of(i) suppression of the diffraction halo of the target star using coronagraphs,and (ii) removal of any residual diffraction structure through focal planewavefront sensing and subsequent active correction. In this paper we presentthe two coronagraphs used for diffraction suppression and enabling highcontrast imaging in ERIS.

High contrast imaging for the enhanced resolution imager and spectrometer (ERIS)