Paper
5 September 2002 New centroid computation method using dynamic tracking
Author Affiliations +
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.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Wavefront sensors

Speckle

Charge-coupled devices

Turbulence

Wavefronts

Atmospheric sensing

CCD image sensors

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