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Proceedings Paper

Phase retrieval methods for wavefront sensing
Author(s): Siddarayappa Bikkannavar; David Redding; Joseph Green; Scott Basinger; David Cohen; John Lou; Catherine Ohara; Fang Shi
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Paper Abstract

Phase retrieval is an image-based wavefront sensing process, used to recover phase information from defocused stellar images. Phase retrieval has proven to be useful for diagnosis of optical aberrations in space telescopes, calibration of adaptive optics systems, and is intended for use in aligning and phasing the James Webb Space Telescope. This paper describes a robust and accurate phase retrieval algorithm for wavefront sensing, which has been successfully demonstrated on a variety of testbeds and telescopes. Key features, such as image preprocessing, diversity adaptation, and prior phase nulling, are described and compared to other methods. Results demonstrate high accuracy and high dynamic range wavefront sensing.

Paper Details

Date Published: 22 July 2010
PDF: 15 pages
Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77392X (22 July 2010); doi: 10.1117/12.858980
Show Author Affiliations
Siddarayappa Bikkannavar, Jet Propulsion Lab. (United States)
David Redding, Jet Propulsion Lab. (United States)
Joseph Green, Jet Propulsion Lab. (United States)
Scott Basinger, Jet Propulsion Lab. (United States)
David Cohen, Jet Propulsion Lab. (United States)
John Lou, Jet Propulsion Lab. (United States)
Catherine Ohara, Jet Propulsion Lab. (United States)
Fang Shi, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7739:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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