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Fast Approximate Broadband Phase Retrieval for Segmented Systems

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We applied a technique for approximate broadband phase retrieval to a segmented aperture model of the James Webb Space Telescope’s Fine Guidance Sensor in the ultra-broadband regime (1–5 μm, 133% fractional bandwidth). It yielded an over-200× improvement in runtime, but at the cost of limiting accuracy to approximately 0.031 wave RMS.

© 2011 Optical Society of America

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