title: High-efficiency, wide-bandwidth optical fanout elements in dichromated gelatin.
abstract: We have combined the flexibility of computer-generated binary holograms with the high optical quality of dichromated gelatin holography to fabricate a range of efficient, wide-bandwidth, and compact space-invariant fanout elements. Our approach is based on a certain novel coherent spatial filtering technique, termed the inverse central dark ground method, which permits the use of a binary-amplitude hologram corresponding to the desired binaryphase profile in the object arm of the interferometric recording setup.
authors.forename: B
authors.initials: B
authors.lastname: Robertson
authors.forename: M R
authors.initials: MR
authors.lastname: Taghizadeh
authors.forename: J
authors.initials: J
authors.lastname: Turunen
authors.forename: A
authors.initials: A
authors.lastname: Vasara