Paper:	Testing PIAA Coronagraphs at NASA Ames
Volume:	430, Pathways Towards Habitable Planets
Page:	453
Authors:	Greene, T.; Belikov, R.; Connelley, M.; Guyon, O.; Lynch, D.; McKelvey, M.; Pluzhnik, E.; Witteborn, F.
Abstract:	We report on our tests of phase induced amplitude apodization (PIAA) coronagraphs in a new laboratory at NASA Ames. This laboratory is operated in a highly stabilized air environment, and it complements existing efforts at NASA JPL’s high contrast imaging testbed. At the time of writing, we are operating a refractive PIAA system and have achieved imaging contrast of 7 × 10–8 in a dark zone from 2.0 to 4.8 λ/D from an artificial star. We are also directing L3 Tinsley Laboratories in the fabrication of a next generation polychromatic PIAA coronagraph mirror set.

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