Real-time electroholographic system using liquid crystal television spatial light modulators

1 April 1993

journal article
Published by SPIE-Intl Soc Optical Eng in Journal of Electronic Imaging

Vol. 2 (2) , 93-100
https://doi.org/10.1117/12.136692

Abstract

Matrix-addressed liquid crystal devices, such as liquid crystal television spatial light modulators (LCTV-SLMs) have a suitability for displaying holograms electrically in real time because of their ability to easily display image patterns by electric signals. In our electroholographic system, a CCD camera reads a holographic interference fringe pattern, i.e., a hologram, which is then transmitted to and subsequently displayed on an LCTV-SLM by video signals. The LCTV-SLM is illuminated with collimated laser light and the image of the electrohologram is reconstructed in real time. Because the carrier frequency of the hologram is very low, a limitation imposed by the relatively low resolution of the CCD camera and the LCTV-SLM, a spatial-filtering technique is applied to remove the zeroth-order diffracted light from the reconstructed image.

Keywords

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