BIP! Finder - Phase-retrieval-based wavefront metrology for high-contrast coronography: 2. Reconstructions through a shaped pupil apodizer

2019 • Phase-retrieval-based wavefront metrology for high-contrast coronography: 2. Reconstructions through a shaped pupil apodizer

Authors: Gregory R. Brady, Peter Petrone, Iva Laginja, Keira Brooks, Manxuan Zhang, Mamadou N'Diaye, Christopher Moriarty, John G. Hagopian, Rémi Soummer

Venue: Techniques and Instrumentation for Detection of Exoplanets IX

Type: Publication

Abstract: We discuss the use of parametric phase-diverse phase retrieval to characterize and optimize the transmitted wavefront of a high-contrast apodized pupil coronagraph with and without an apodizer. We apply our method to correct the transmitted wavefront of the HiCAT (High contrast imager for Complex Aperture Telescopes) coronagraphic testbed. This correction requires a series of calibration steps, which we describe. The correction improves the system wavefront from 16 nm RMS to 3.0 nm RMS for the case where a uniform circular aperture is in place.... (read more)

Topics: Optics Remote sensing

DOI: 10.1117/12.2530482

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External links: Crossref OpenAIRE

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