title: Filter performance parameters for high-aperture focusing.
abstract: Performance parameters for focusing, widely used to investigate the properties of pupil filters, are extended to the scalar nonparaxial regime. These measures can be used to investigate focusing properties of different types of focusing systems, including those with apodizers and superresolving masks.
authors.affiliation: Department of Diagnostic Radiology, National University of Singapore. biescjr@nus.edu.sg
authors.forename: Colin J R
authors.initials: CJ
authors.lastname: Sheppard
mesh_terms: D005374:Filtration; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008027:Light; D008853:Microscopy / Q000295:instrumentation; D015233:Models, Statistical; D055095:Optics and Photonics / Q000295:instrumentation*; D012984:Software