Performance and sensitivity of vortex coronagraphs on segmented space telescopes

Garreth Ruane; Dimitri Mawet; Jeffrey Jewell; Stuart Shaklan

doi:10.1117/12.2274508

1 September 2017 Performance and sensitivity of vortex coronagraphs on segmented space telescopes

Garreth Ruane, Dimitri Mawet, Jeffrey Jewell, Stuart Shaklan

Proceedings Volume 10400, Techniques and Instrumentation for Detection of Exoplanets VIII; 104000J (2017) https://doi.org/10.1117/12.2274508
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

The detection of molecular species in the atmospheres of earth-like exoplanets orbiting nearby stars requires an optical system that suppresses starlight and maximizes the sensitivity to the weak planet signals at small angular separations. Achieving sufficient contrast performance on a segmented aperture space telescope is particularly challenging due to unwanted diffraction within the telescope from amplitude and phase discontinuities in the pupil. Apodized vortex coronagraphs are a promising solution that theoretically meet the performance needs for high contrast imaging with future segmented space telescopes. We investigate the sensitivity of apodized vortex coronagraphs to the expected aberrations, including segment co-phasing errors in piston and tip/tilt as well as other low-order and mid-spatial frequency aberrations. Coronagraph designs and their associated telescope requirements are identified for conceptual HabEx and LUVOIR telescope designs.

Conference Presentation

Citation Download Citation

Garreth Ruane, Dimitri Mawet, Jeffrey Jewell, and Stuart Shaklan "Performance and sensitivity of vortex coronagraphs on segmented space telescopes", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104000J (1 September 2017); https://doi.org/10.1117/12.2274508

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