Encoding technique for design of zero-order (on-axis) Fraunhofer computer-generated holograms

David Mendlovic, Gal Shabtay, Uriel Levi, Zeev Zalevsky, Emanuel Marom

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)8427-8434
Number of pages8
JournalApplied Optics
Issue number32
StatePublished - 10 Nov 1997


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