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Liquid crystal television as a coherent spatial light modulator

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Abstract

The recent availability of inexpensive liquid crystal television (LCTV) has led to experimenting with these devices as coherent spatial light modulators. The basic principle behind operation of the LCTV is somewhat similar to that of the Hughes liquid crystal light valve (LCLV) which has been used for some time as an incoherent-to-coherent image converter in real-time optical correlators.1 A major difference in the two devices is the method of addressing. The LCLV is optically addressed, while the LCTV must be electrically addressed. One such LCTV (Citizen model 03TAOA) has been modified by removal of the poor quality polarizers attached to both sides of the liquid crystal/electrode grid sandwich. The light diffuser was also removed and the screen hinge modified so that the screen could be positioned upright. The electrode grid addressing structure produces an array of 148 horizontal pixels by 122 vertical pixels. The pixel size is ~0.22 × 0.37 mm.

© 1986 Optical Society of America

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