Proceedings Article10.1117/12.819586
Performance analysis of Shack-Hartmann wavefront sensor
Hongli Chen,Hongli Chen,Linhui Chen,Linhui Chen,Changhui Rao +4 more
- 17 Dec 2008
- Vol. 7130, pp 312-318
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TL;DR: A method with which to calibrate a Shack-Hartmann wavefront sensor for absolute wavefront measurement for tilt without any accessorial apparatus is studied, and the method is tested by experiment.
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Abstract: A detailed analysis of the principle of Shack-Hartmann wavefront sensor is presented. Typical performance metrics such
as dynamic range, sensitivity, repeatability and accuracy are defined and discussed. A method with which to calibrate a
Shack-Hartmann wavefront sensor for absolute wavefront measurement for tilt without any accessorial apparatus is
studied, and the method is tested by experiment.
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Citations
Actuation for carbon fiber reinforced polymer active optical mirrors
Matthew Edward Lewis Jungwirth,David V. Wick,Michael S. Baker,Christopher C. Wilcox,Eustace L. Dereniak,Robert C. Romeo,Robert N. Martin +6 more
- 03 Mar 2012
TL;DR: In this paper, the authors used two annular rings to push against the mirror's back, producing a wavefront with less than 20 waves of total error, using finite element analysis and interferometric testing.
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Comparison of correlation algorithms with correlating Shack-Hartmann wave-front images
Hangcheng Zhou,Zhang Lanqiang,Lei Zhu,Hua Bao,Youming Guo,Xuejun Rao,Libo Zhong,Changhui Rao +7 more
- 04 Nov 2016
TL;DR: In this article, several different correlation algorithms including Cross-Correlation Coefficient, Absolute Difference Function,Absolute Difference Function-Squared and Square Difference Function are used to estimate relative shift in correlating Shack-Hartmann wave-front sensor with the different observed solar structure such as sunspot, solar pore and solar granulation.
References
Shack-Hartmann wavefront sensor precision and accuracy
Daniel R. Neal,James Copland,David A. Neal +2 more
- 01 Nov 2002
TL;DR: A standard methodology for measuring the repeatability, accuracy and dynamic range of different wavefront sensor designs, and has experimentally applied these metrics to a number of different sensors.
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Hartmann wave-front measurement at 13.4 nm with lambdaEUV/120 accuracy.
Pascal Mercère,Philippe Zeitoun,Mourad Idir,Sébastien Le Pape,Denis Douillet,Xavier Levecq,Guillaume Dovillaire,Samuel Bucourt,Kenneth A. Goldberg,Patrick P. Naulleau,Senajith Rekawa +10 more
TL;DR: This report reports, for the first time to the authors' knowledge, experimental demonstration of wave-front analysis via the Hartmann technique in the extreme ultraviolet range using a spatially unfiltered incident beam to characterize a sensor.
107
Cramér–Rao lower bounds on the performance of charge-coupled-device optical position estimators
TL;DR: In this paper, a two-dimensional Cramer-Rao bound is derived to determine a lower bound for the mean-squared error of any unbiased position estimator, and the maximum likelihood estimator is also derived.
A center detection algorithm for Shack–Hartmann wavefront sensor
TL;DR: In this article, a modified center position detection algorithm of the spot image for the Shack-Hartmann wavefront sensor was experimentally investigated, where the modified center of weight algorithm uses some power from the gray-level intensity of the spots instead of the gray level intensity itself.
64
Fundamental and specific steps in Shack-Hartmann wavefront sensor design
TL;DR: A first order approach for selecting the optimal parameters of the sensor central piece, the lenslet array, is presented and a quick tolerance analysis method is proposed that can predict the wavefront measurement error due to misalignments, using only the ray-tracing software.
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