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- W2153531532 abstract "The Shack-Hartmann wavefront sensor is the most common wavefront sensor used today in adaptive optics. While the most common way to employ a Shack-Hartmann wavefront sensor is with a centroiding-based algorithm, recent studies have shown how its accuracy can be increased by using a correlation-based algorithm. This paper compares the accuracy of a correlation-based Shack-Hartmann wavefront sensor to a centroiding-based Shack-Hartmann wavefront sensor by measuring the distortions of a point source viewed through strong turbulence where scintillation, variations in the amplitude of the field, plays an important role. In particular, this paper demonstrates that a correlation-based algorithm generally does outperform the centroiding-based algorithm, but by using a simple threshold a centroiding-based Shack-Hartmann can produce similar results as a correlation-based Shack-Hartmann. Also, in very low signal levels, such as when the average signal level is below the detector read noise, a regular centroiding-based Shack-Hartmann outperforms all other methods tested." @default.
- W2153531532 created "2016-06-24" @default.
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- W2153531532 date "2010-03-01" @default.
- W2153531532 modified "2023-09-24" @default.
- W2153531532 title "Correlation-based Shack-Hartmann wavefront slope sensing in strong turbulence" @default.
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- W2153531532 doi "https://doi.org/10.1109/aero.2010.5446714" @default.
- W2153531532 hasPublicationYear "2010" @default.
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