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Proceedings Paper

Broadband wavefront correction algorithm for high-contrast imaging systems
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Paper Abstract

Great strides have been made in recent years toward the goal of high-contrast imaging with a sensitivity adequate to detect earth-like planets around nearby stars. It appears that the hardware − optics, coronagraph masks, deformable mirrors, illumination systems, thermal control systems − are up to the task of obtaining the required 10-10 contrast. But in broadband light (e.g., 10% bandpass) the wavefront control algorithms have been a limiting factor. In this paper we describe a general correction methodology that works in broadband light with one or multiple deformable mirrors by conjugating the electric field in a predefined region in the image where terrestrial planets would be found. We describe the linearized approach and demonstrate its effectiveness through laboratory experiments. This paper presents results from the Jet Propulsion Laboratory High Contrast Imaging Testbed (HCIT) for both narrow-band light (2%) and broadband light (10%) correction.

Paper Details

Date Published: 18 September 2007
PDF: 11 pages
Proc. SPIE 6691, Astronomical Adaptive Optics Systems and Applications III, 66910A (18 September 2007); doi: 10.1117/12.733122
Show Author Affiliations
Amir Give'on, Jet Propulsion Lab. (United States)
Brian Kern, Jet Propulsion Lab. (United States)
Stuart Shaklan, Jet Propulsion Lab. (United States)
Dwight C. Moody, Jet Propulsion Lab. (United States)
Laurent Pueyo, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 6691:
Astronomical Adaptive Optics Systems and Applications III
Robert K. Tyson; Michael Lloyd-Hart, Editor(s)

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