title: Modified Shack-Hartmann wavefront sensor using an array of superresolution pupil filters.
abstract: A conventional Shack-Hartmann wavefront sensor works with an array of lenslets which produces an array of focal spots in the back focal plane of the lenses. The displacements of the focal spots from a reference position give a measure of the mean local wavefront slopes. To determine the positions of the focal spots, centroiding algorithms have to be used. In this work, the use of superresolution pupil filters to reduce the size of the focal spots is analyzed, as well as its effect on the variance of the centroid estimate, seeking for an enhancing of the sensor accuracy.
authors.affiliation: Dept Física Básica, Univ La Laguna, Tenerife, Spain. Susana.Rios@ull.es
authors.forename: Susana
authors.initials: S
authors.lastname: Ríos
authors.forename: David
authors.initials: D
authors.lastname: López
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007909:Lenses; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers