Coronagraphic capability for HARMONI at the E-ELT

Journal article

HARMONI is a proposed visible and near-infrared integral field spectrograph for the European Extremely Large Telescope. We are exploring the merits of adding a coronagraphic capability to HARMONI, specifically targeted at enabling observations of faint, nearby companions (primarily extra-solar planets) that require high contrast. Although HARMONI is not fed by extreme adaptive optics, we show that substantial contrasts can be achieved by post-processing of the hyperspectral data cube using spectral deconvolution. We make predictions of achievable contrast as a function of coronagraph design, based on realistic models of the telescope's aberrations. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Authors: Gladysz, S; Thatte, N; Clarke, F; Tecza, M; Salter, G

• Journal: Proceedings of SPIE - The International Society for Optical Engineering
• Volume: 7735
• Issue: PART 1
• Publication date: 2010-01-01
• DOI: 10.1117/12.857378
• ISSN: 0277-786X
• Language: English
• Keywords: adaptive optics; exoplanets; integral-field spectrograph; extremely large telescopes; high-contrast imaging