12 October 2004 The sensitivity of shaped pupil coronagraphs to optical aberrations
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Abstract
Unlike focal-plane coronagraphs that use occulting spots and Lyot stops to eliminate diffraction, pupil-plane coronagraphs operate by shaping the pupil to redirect the diffracted stellar light into a tight core. As with focal-plane coronagraphs, the optical aberrations in the telescope must be sufficiently corrected to enable high contrast imaging. However, in shaped-pupil coronagraphs, the low-order aberrations resulting from misalignment and optical figure drift have a much smaller influence upon the contrast at the inner working angle. These weaker sensitivities greatly relax the strict low-order wavefront stability required for high-contrast imaging at the cost of some throughput. In this paper, we present the simulated performance of the concentric ring shaped pupil concepts comparing them to focal-plane coronagraphs that are optimized for the same inner working angles.
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Joseph Jacob Green, Stuart B. Shaklan, Robert J. Vanderbei, N. Jeremy Kasdin, "The sensitivity of shaped pupil coronagraphs to optical aberrations", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.552328; https://doi.org/10.1117/12.552328
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KEYWORDS
Coronagraphy

Optical aberrations

Infrared telescopes

Space telescopes

Device simulation

Diffraction

Infrared radiation

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