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Proceedings Paper

Optimal shaped pupil coronagraphs for extrasolar plant finding
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Paper Abstract

We examine several different approaches to achieving high contrast imaging of extrasolar planets. Rather than controlling the diffracted light by masking the star's image as in a classical coronagraph, we use the pupil's transmission function to focus the starlight. There are two broad classes of pupil coronagraphs examined in this paper: apodized pupils with spatially varying transmision functions and shaped pupils, whose transmission values are either 0 or 1. The latter are much easier to manufacture to the needed tolerances. This paper introduces several new shaped pupils and applies integration time and other metrics to them as well as to apodized pupils. These new designs can achieve nearly as high a throughput as the best apodized pupils and perform significantly better than the apodized square aperture design. The new shaped pupils enable searches of 50% -100% of thedetectable region, suppress the star's light to below 10-10 of its peak value and have inner working distances as small as 2.8 λ/D.

Paper Details

Date Published: 3 March 2003
PDF: 11 pages
Proc. SPIE 4860, High-Contrast Imaging for Exo-Planet Detection, (3 March 2003); doi: 10.1117/12.457675
Show Author Affiliations
N. Jeremy Kasdin, Princeton Univ. (United States)
Robert J. Vanderbei, Princeton Univ. (United States)
David N. Spergel, Princeton Univ. (United States)
Michael G. Littman, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 4860:
High-Contrast Imaging for Exo-Planet Detection
Alfred B. Schultz; Richard G. Lyon, Editor(s)

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