title: Changing image of correlation optics: introduction.
abstract: This feature issue of Applied Optics contains a series of selected papers reflecting recent progress of correlation optics and illustrating current trends in vector singular optics, internal energy flows at light fields, optical science of materials, and new biomedical applications of lasers.
authors.forename: Oleg V
authors.initials: OV
authors.lastname: Angelsky
authors.forename: Anton S
authors.initials: AS
authors.lastname: Desyatnikov
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Gbur
authors.forename: Steen G
authors.initials: SG
authors.lastname: Hanson
authors.forename: Tim
authors.initials: T
authors.lastname: Lee
authors.forename: Yoko
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Herbert
authors.initials: H
authors.lastname: Schneckenburger
authors.forename: James C
authors.initials: JC
authors.lastname: Wyant