title: Single adjuster deformable mirror with four contact points for simultaneous correction of astigmatism and defocus.
abstract: We show that a deformable mirror with four point actuators is suitable for the simultaneous correction of astigmatism and defocus in a given optical system by adequately choosing the relative position of the actuators. An analytical model is developed that describes adequately the mirror deformation as a function of actuator position, showing that it is possible to continuously tune the weight of each aberration. Experimental measurements with a single adjuster deformable mirror assembly confirm the validity of the model.
authors.forename: Gonçalo
authors.initials: G
authors.lastname: Figueira
authors.forename: João
authors.initials: J
authors.lastname: Wemans
authors.forename: Hugo
authors.initials: H
authors.lastname: Pires
authors.forename: Nelson
authors.initials: N
authors.lastname: Lopes
authors.forename: Luís
authors.initials: L
authors.lastname: Cardoso