title: Encoding technique for design of zero-order (on-axis) Fraunhofer computer-generated holograms.
abstract: Diffractive optical elements able to generate zero-order (on-axis) distributions with phase as well as amplitude distributions are described. The proposed elements are surface relief plates, i.e., phase-only elements, that are based on the concept of computer-generated masks followed by common etching processes. The encoding method assumes fixed spatial partitioning of the cell and a phase-only value allocated to each subelement. The reconstructed amplitude and phase distributions contain imperfections (noise) resulting from the encoding process. Methods of error reduction and improvements are provided.
authors.forename: D
authors.initials: D
authors.lastname: Mendlovic
authors.forename: G
authors.initials: G
authors.lastname: Shabtay
authors.forename: U
authors.initials: U
authors.lastname: Levi
authors.forename: Z
authors.initials: Z
authors.lastname: Zalevsky
authors.forename: E
authors.initials: E
authors.lastname: Marom