Physics – Optics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21113520g&link_type=abstract
American Astronomical Society, AAS Meeting #211, #135.20; Bulletin of the American Astronomical Society, Vol. 39, p.975
Physics
Optics
Scientific paper
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 1010 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.
Give'on Amir A.
Kern Brian
Moody Dwight C.
Pueyo Laurent
Shaklan Stuart
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