Open AccessExtracting more than two orthogonal derivatives from a Shack-Hartmann wavefront sensor
Author(s) -
Bastien Rouzé,
Georges Giakoumakis,
Adrien Stolidi,
Julien Jaeck,
Cindy Bellanger,
Jérôme Primot
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.413571
Subject(s) - wavefront , optics , wavefront sensor , microlens , centroid , fourier transform , physics , interferometry , computer science , harmonics , artificial intelligence , lens (geology) , quantum mechanics , voltage
The purpose of this paper is to show that the Shack-Hartmann wavefront sensor (SHWFS) gives access to more derivatives than the two orthogonal derivatives classically extracted either by estimating the centroid or by taking into account the first two harmonics of the Fourier transform. The demonstration is based on a simple model of the SHWFS, taking into account the microlens array as a whole and linking the SHWFS to the multi-lateral shearing interferometry family. This allows for estimating the quality of these additional derivatives, paving the way to new reconstruction techniques involving more than two cross derivatives that should improve the signal-to-noise ratio.