Márquez, Andrés, Gallego, Sergi, Méndez Alcaraz, David Israel, Alvarez, Mariela L., Fernandez-Varo, Helena, Ortuño, Manuel, Neipp, Cristian, Beléndez, Augusto, Pascual, Inmaculada
Accurate control of a liquid-crystal display to produce a homogenized Fourier transform for holographic memories
MÁRQUEZ RUIZ, Andrés, et al. "Accurate control of a liquid-crystal display to produce a homogenized Fourier transform for holographic memories". Optics Letters. Vol. 32, No. 17 (Sept. 2007). ISSN 0146-9592, pp. 2511-2513
URI: http://hdl.handle.net/10045/9194
DOI: 10.1364/OL.32.002511
ISSN: 0146-9592 (Print)
Abstract: 
We show an accurate procedure to obtain a Fourier transform (FT) with no dc term using a commercial twisted-nematic liquid-crystal display. We focus on the application to holographic storage of binary data pages, where a drastic decrease of the dc term in the FT is highly desirable. Two different codification schemes are considered: binary π radians phase modulation and hybrid ternary modulation. Any deviation in the values of the amplitude and phase shift generates the appearance of a strong dc term. Experimental results confirm that the calculated configurations provide a FT with no dc term, thus showing the effectiveness of the proposal.
Keywords:Holography, Optical data storage, Diffractive optics, Liquid-crystal devices, Spatial light modulators, Holographic and volume memories, Fourier optics and signal processing
Optical Society of America
info:eu-repo/semantics/article