Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-05-07
1998-12-08
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 17, 349116, 349201, G02F 11335, G02F 1133, G02F 113
Patent
active
058477888
ABSTRACT:
An optical information processor according to the present invention comprises a spatial light modulator 1 illuminated by linearly polarized coherent light and a linear polarization detector element 2 for detecting light diffracted by the spatial light modulator 1, wherein a rotatory polarization element of the spatial light modulator 1 is arranged in such a manner that the direction of the major molecular axis 11 thereof at the incident light side substantially conforms to the linear polarization axis direction (Y-axis direction) of the coherent light and the linear polarization detector element 2 is arranged in such a manner that the detecting axis 21 thereof crosses substantially at right angles with the major polarization axis of the zero-order diffracted light 4 included in the diffracted light described above. As a result, it is possible to effectively reduce the zero-order diffracted light component which is not modulated by the spatial light modulator without increasing the entire length of the optical system so much and without requiring excessive electric circuit or processing time.
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Aris Tanone et al., Effects of thresholding in joint-transform correlation, Applied Optics, vol. 31, No. 23, Aug. 10, 1992, pp. 4816-4822.
Nobuyuki Hashimoto et al., "Real-time electroholographic system using liquid crystal television spatial light modulators", Journal of Electronic Imaging, Apr. 1993, vol. 2(2), pp. 93-99.
Citizen Watch Co. Ltd.
Ngo Julie
Sikes William L.
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