title: Line-spread function relatively insensitive to defocus.
abstract: A new approach for obtaining line-spread functions (LSF's), which vary slowly in out-of-focus planes, is described. Based on this approach, we report a LSF that shows relatively less sensitivity to focus errors than that shown by both the diffraction-limited LSF and a LSF previously reported.
authors.forename: J
authors.initials: J
authors.lastname: Ojeda-Castañeda
authors.forename: L R
authors.initials: LR
authors.lastname: Berriel-Valdos
authors.forename: E L
authors.initials: EL
authors.lastname: Montes