Laboratory Demonstration of Occulter-Based High Contrast Imaging

Details Laboratory Demonstration of Occulter-Based High Contrast Imaging Laboratory Demonstration of Occulter-Based High Contrast Imaging

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915510s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #155.10

Astronomy and Astrophysics

Astronomy

Scientific paper

The direct imaging of Earth-like planets in neighbouring solar systems requires generating 10 orders of magnitude in contrast. Using an optimized external occulter, such high levels of contrast suppression can be theoretically achieved using a space telescope. At Princeton, we have designed an experimental testbed where we scaled a 400 mas occulter to fit in the laboratory. We present monochromatic results obtained using a HeNe laser that achieves 10 orders of magnitude of contrast in parts of an annular discovery region in the image plane. We also present mask designs for this testbed that can be used for out-of-band sensing to enable location estimation in the shadow for use in precise formation flight. A second mask design is presented for high contrast imaging that can theoretically achieve 10 orders of magnitude suppression everywhere in the discovery zone and will be verified in the experimental testbed.

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