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Proceedings Paper

Hybrid phase-diverse phase retrieval algorithm in wavefront sensing for segmented optics
Author(s): Heng Mao; Xiao Wang; Dazun Zhao
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Paper Abstract

Wavefront sensing of the segmented optics usually includes two steps. The first step is to sense and correct each segment's position error (co-phasing error) and figure error (aberration), and the second step is to sense the residual wavefront error over the whole aperture. However, due to the limited correction capability and accuracy of the figure sensing and co-phasing sensing in the first step, the original fine wavefront sensing (WFS) algorithm in the second step, the Modified Baseline algorithm, would be failed once the absolute figure difference at nearby edges of nearby segments exceeds λ/2. Thus a Hybrid Phase-diverse Phase Retrieval (HPDPR) algorithm, which adds the Levenburg-Marquardt (LM) algorithm to eliminate each segment's residual position error for decreasing the absolute figure difference, is proposed. Simulations have proven the validity of the HPDPR algorithm, and shown its robustness and high WFS accuracy.

Paper Details

Date Published: 12 March 2008
PDF: 8 pages
Proc. SPIE 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing, 66241M (12 March 2008); doi: 10.1117/12.791169
Show Author Affiliations
Heng Mao, Beijing Institute of Technology (China)
Xiao Wang, Beijing Institute of Technology (China)
Dazun Zhao, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 6624:
International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing

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