R Tudela et al 2003 J. Opt. A: Pure Appl. Opt. 5 S189 doi:10.1088/1464-4258/5/5/363
R Tudela, E Martín-Badosa, I Labastida, S Vallmitjana, I Juvells and A Carnicer
Show affiliationsWe propose a method to display full complex Fresnel holograms by adding the information displayed on two analogue ferroelectric liquid crystal spatial light modulators. One of them works in real-only configuration and the other in imaginary-only mode. The Fresnel holograms are computed by backpropagating an object at a selected distance with the Fresnel transform. Then, displaying the real and imaginary parts on each panel, the object is reconstructed at that distance from the modulators by simple propagation of light. We present simulation results taking into account the specifications of the modulators as well as optical results. We have also studied the quality of reconstructions using only real, imaginary, amplitude or phase information. Although the real and imaginary reconstructions look acceptable for certain distances, full complex reconstruction is always better and is required when arbitrary distances are used.
42.79.Kr Display devices, liquid-crystal devices
42.79.Hp Optical processors, correlators, and modulators
42.30.Wb Image reconstruction; tomography
42.25.Fx Diffraction and scattering
42.40.Lx Diffraction efficiency, resolution, and other hologram characteristics
Issue 5 (September 2003)
Received 14 November 2002, in final form 17 January 2003
Published 22 August 2003
R Tudela et al 2003 J. Opt. A: Pure Appl. Opt. 5 S189
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