title: Modified two-focal-length optical correlator.
abstract: We present a modification to our previously reported 2f optical correlator. This modification removes a lens from the system and maintains a variable Fourier transform scale property while providing an equal correlation performance.
authors.forename: K H
authors.initials: KH
authors.lastname: Fielding
authors.forename: J L
authors.initials: JL
authors.lastname: Horner
authors.forename: C K
authors.initials: CK
authors.lastname: Makekau