Open AccessHartmann-Shack analysis errors
Author(s) -
Naftali Zon,
Orr Srour,
Erez N. Ribak
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.14.000635
Subject(s) - optics , centroid , demodulation , pixel , physics , fourier transform , wavefront , image processing , fourier optics , computer science , computer vision , artificial intelligence , image (mathematics) , telecommunications , channel (broadcasting) , quantum mechanics
A theoretical model for reconstruction errors in the Hartmann-Shack wave-front sensor was constructed. The measured pattern of a regulargrid of spots can be analyzed by their individual centroiding or by a globalFourier demodulation. We investigate pixelization errors in the cameraand Poisson errors in the camera pixels. We show that by the Fourier demodulation technique it is possible to overcome pixelization errors which occur in the traditional centroid technique. By supporting simulations we show that the two methods coincide for an infinite number of pixels per spot.