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Appl Opt. 2009 Dec 20;48(36):6907-12. doi: 10.1364/AO.48.006907.

Phase shifting digital holography implemented with a twisted-nematic liquid-crystal display.

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  • 1Instituto Nacional de Astrofísica, Optica y Electrónica, Apartado Postal 51 y 216, Puebla, PUE 72000, México.


We describe and experimentally demonstrate a phase shifting method based on the lateral displacement of a grating implemented with a twisted-nematic liquid-crystal spatial light modulator. This method allows an accurate implementation of the phase shift without requiring moving parts. The technique is implemented in a Mach-Zehnder digital holography setup in which the field transmitted by the sample object freely propagates to the hologram plane.

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