New centroid computation method using dynamic tracking

Bo Li; Xin Yu; Xinqi Hu

doi:10.1117/12.481686

5 September 2002 New centroid computation method using dynamic tracking

Bo Li, Xin Yu, Xinqi Hu

Proceedings Volume 4926, Adaptive Optics and Applications II; (2002) https://doi.org/10.1117/12.481686
Event: Photonics Asia, 2002, Shanghai, China

Abstract

The disadvantage in expanding dynamic range and restraining noise of the traditional H-S (Hartmann-Shack) wavefront sensor centroid computation method is analyzed. Based on the temporal characteristic of atmosphere turbulence, through determining the changing scope of centroid motion between two adjacent sample periods, a new dynamic tracking centroid method of H-S wavefront sensor is proposed. Using this method, the dynamic range of wavefront sensor can be expanded when atmosphere turbulence is strong; the effect of CCD readout noise and shot noise can be reduced.

Citation Download Citation

Bo Li, Xin Yu, and Xinqi Hu "New centroid computation method using dynamic tracking", Proc. SPIE 4926, Adaptive Optics and Applications II, (5 September 2002); https://doi.org/10.1117/12.481686

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