Proceedings Paper
Noise reduction in the centroiding of laser guide star spot pattern using thresholded Zernike reconstructor| Format | Member Price | Non-Member Price |
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Paper Abstract
Centroiding inaccuracies contribute to most of the wavefront reconstruction error in a Shack Hartmann sensor
based adaptive optics system. These errors primarily occur due to the presence of photon noise, readout noise,
finite background and strong scintillations. Elongation of the spots in the case of large apertures while using Laser
guide star as reference makes the situation further worse. A denoising procedure based on thresholded Zernike
reconstructor and pattern matching is suggested in this paper to largely overcome these problems. Individual
spot pattern images are reconstructed using Zernike polynomials and matched with ideal spot pattern without
distortion to arrive at accurate local centroid positions.
Paper Details
Date Published: 28 July 2010
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77364E (28 July 2010);
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77364E (28 July 2010);
Show Author Affiliations
Akondi Vyas, Indian Institute of Astrophysics (India)
Indian Institute of Science (India)
M. B. Roopashree, Indian Institute of Astrophysics (India)
Indian Institute of Science (India)
M. B. Roopashree, Indian Institute of Astrophysics (India)
B. Raghavendra Prasad, Indian Institute of Astrophysics (India)
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
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