期刊
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
卷 5, 期 5, 页码 S189-S194出版社
IOP PUBLISHING LTD
DOI: 10.1088/1464-4258/5/5/363
关键词
Fresnel diffraction; wavefront propagation; holography; liquid crystal devices; optical image processing
类别
We 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.
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