title: Amplitude metrics for field retrieval with hard-edged and uniformly illuminated apertures.
abstract: In field retrieval, the amplitude and phase of the generalized pupil function for an optical system are estimated from multiple defocused measurements of the system point-spread function. A baseline field reconstruction algorithm optimizing a data consistency metric is described. Additionally, two metrics specifically designed to incorporate a priori knowledge about pupil amplitude for hard-edged and uniformly illuminated aperture systems are given. Experimental results demonstrate the benefit of using these amplitude metrics in addition to the baseline metric.
authors.affiliation: The Institute of Optics, University of Rochester, Rochester, NY 14627, USA.
authors.forename: Samuel T
authors.initials: ST
authors.lastname: Thurman
authors.forename: Ryan T
authors.initials: RT
authors.lastname: DeRosa
authors.forename: James R
authors.initials: JR
authors.lastname: Fienup