Acta Optica Sinica, Volume. 32, Issue 7, 701006(2012)
Frequency-Domain Iterative Algorithm for Extended Scene Shack-Hartmann Wavefront Sensing
The estimation of the shifts between sub-images obtained in extended scene Shack-Hartmann wavefront sensing (SH-WFS) are the keys for calculating wavefront errors. The estimation can be got by parabolic interpolation algorithm and the accuracy can reach sub-pixel. The estimation can also be acquired by frequency-domain phase-shift algorithm and the accuracy can increase using frequency-domain iterative algorithm. Based on the later algorithm, the theoretical analysis, simulation and experiment are researched. The results show that the parabolic interpolation algorithm and frequency-domain iterative algorithm get close results in low signal-noise-ratio (SNR), but the later one performs better while SNR is higher than 41.
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Zeng Renchang, Liu Xiaohua, Hu Xinqi, Yang Peng. Frequency-Domain Iterative Algorithm for Extended Scene Shack-Hartmann Wavefront Sensing[J]. Acta Optica Sinica, 2012, 32(7): 701006
Category: Atmospheric Optics and Oceanic Optics
Received: Oct. 27, 2011
Accepted: --
Published Online: May. 24, 2012
The Author Email: Renchang Zeng (zrch123@126.com)