Phase retrieval methods for wavefront sensing

Siddarayappa Bikkannavar; David Redding; Joseph Green; Scott Basinger; David Cohen; John Lou; Catherine Ohara; Fang Shi

doi:10.1117/12.858980

22 July 2010 Phase retrieval methods for wavefront sensing

Siddarayappa Bikkannavar, David Redding, Joseph Green, Scott Basinger, David Cohen, John Lou, Catherine Ohara, Fang Shi

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77392X (2010) https://doi.org/10.1117/12.858980
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Siddarayappa Bikkannavar, David Redding, Joseph Green, Scott Basinger, David Cohen, John Lou, Catherine Ohara, and Fang Shi "Phase retrieval methods for wavefront sensing", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77392X (22 July 2010); https://doi.org/10.1117/12.858980

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