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Proceedings Paper

Demonstration of a symmetric dark hole with a stroke-minimizing correction algorithm
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Paper Abstract

The past decade has seen a significant growth in research targeted at space based observatories for imaging exosolar planets. The challenge is in designing an imaging system for high-contrast. Even with a perfect coronagraph that modifies the point spread function to achieve high-contrast, wavefront sensing and control is needed to correct the errors in the optics and generate a "dark hole". The high-contrast imaging laboratory at Princeton University is equipped with two Boston Micromachines Kilo-DMs. We review here an algorithm designed to achieve high-contrast on both sides of the image plane while minimizing the stroke necessary from each deformable mirror (DM). This algorithm uses the first DM to correct for amplitude aberrations and the second DM to create a flat wavefront in the pupil plane. We then show the first results obtained at Princeton with this correction algorithm, and we demonstrate a symmetric dark hole in monochromatic light.

Paper Details

Date Published: 23 February 2009
PDF: 8 pages
Proc. SPIE 7209, MEMS Adaptive Optics III, 72090G (23 February 2009); doi: 10.1117/12.809815
Show Author Affiliations
Jason D. Kay, Princeton Univ. (United States)
Laurent A. Pueyo, Jet Propulsion Lab. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 7209:
MEMS Adaptive Optics III
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)

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