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Proceedings Paper

Adaptive cross-correlation algorithm and experiment of extended scene Shack-Hartmann wavefront sensing
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Paper Abstract

We have developed a new, adaptive cross-correlation (ACC) algorithm to estimate with high accuracy the shift as large as several pixels in two extended-scene images captured by a Shack-Hartmann wavefront sensor (SH-WFS). It determines the positions of all extended-scene image cells relative to a reference cell using an FFT-based iterative image-shifting algorithm. It works with both point-source spot images as well as extended scene images. We have also set up a testbed for extended-scene SH-WFS, and tested the ACC algorithm with the measured data of both point-source and extended-scene images. In this paper we describe our algorithm and present our experimental results.

Paper Details

Date Published: 20 September 2007
PDF: 11 pages
Proc. SPIE 6687, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts III, 668710 (20 September 2007); doi: 10.1117/12.735030
Show Author Affiliations
Erkin Sidick, Jet Propulsion Lab. (United States)
Rhonda M. Morgan, Jet Propulsion Lab. (United States)
Joseph J. Green, Jet Propulsion Lab. (United States)
Catherine M. Ohara, Jet Propulsion Lab. (United States)
David C. Redding, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 6687:
UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts III
Howard A. MacEwen; James B. Breckinridge, Editor(s)

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