title: Phase-shifting apodizers for increasing focal depth.
abstract: We propose the use of a phase-shifting apodizers to increase focal depth, and we study the axial and radial behavior of this kind of apodizer under the condition that the axial intensity distribution is optimized for high focal depth.
authors.affiliation: Shanghai Institute of Optics and Fine Mechanics, China. h.wang@tnw.tudelft.nl
authors.forename: Haifeng
authors.initials: H
authors.lastname: Wang
authors.forename: Fuxi
authors.initials: F
authors.lastname: Gan