Holographic projection of arbitrary light patterns with a suppressed zero-order beam

Darwin Palima, Vincent Ricardo Mancao Daria

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We present what is to our knowledge a novel technique for efficient suppression of the zero-order beam inherent in light patterns projected via phase-only computer-generated holograms (CGHs). Encoding a CGH on a spatial light modulator (SLM) with a limited fill factor produces a disturbing zero-order beam at the optical axis. Here, we propose to derive a CGH, which includes holographic information to project a corrective beam that destructively interferes with the zero-order beam. The CGH for projecting arbitrary light patterns plus a corrective beam are derived using the Gerchberg-Saxton algorithm where the iterations impose both amplitude and phase constraints for the target field pattern at the Fourier plane. As proof of principle, we analyze the viability of the technique by simulating the performance when applied on a practical SLM with a limited fill factor, fixed number of phase-shifting pixels, and wavefront distortion associated with the surface roughness of the SLM. (C) 2007 Optical Society of America.
Original languageEnglish
JournalApplied Optics
Volume46
Issue number20
Pages (from-to)4197-4201
ISSN1559-128X
DOIs
Publication statusPublished - 2007
Externally publishedYes

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