Encoding amplitude information onto phase-only filters

Jeffrey A. Davis, Don M. Cottrell, Juan Campos, María J. Yzuel, Ignacio Moreno

Research output: Contribution to journalArticleResearchpeer-review

404 Citations (Scopus)


We report a new, to our knowledge, technique for encoding amplitude information onto a phase-only filter with a single liquid-crystal spatial light modulator. In our approach we spatially modulate the phase that is encoded onto the filter and, consequently, spatially modify the diffraction efficiency of the filter. Light that is not diffracted into the first order is sent into the zero order, effectively allowing for amplitude modulation of either the first-order or the zero-order diffracted light. This technique has several applications in both optical pattern recognition and image processing, including amplitude modulation and inverse filters. Experimental results are included for the new technique. © 1999 Optical Society of America.
Original languageEnglish
Pages (from-to)5004-5013
JournalApplied Optics
Issue number23
Publication statusPublished - 10 Aug 1999


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