Spatial light modulator device and a conoscopic holography syste

Details Spatial light modulator device and a conoscopic holography syste Spatial light modulator device and a conoscopic holography syste

1991-07-29

1994-03-01

Hannaher, Constantine

Optical: systems and elements

Optical computing without diffraction

359 11, 359241, G02B 523, G02B 102, G02F 135, G03H 100

Patent

active

052913147

ABSTRACT:
The invention relates to a spatial light modulator device comprising a photo-refractive crystal addressed by means of a write light beam and a read light beam. The crystal is placed in the cavity of an interferometer system having a transmittivity-optical path length characteristic of steep slope so as to give rise to a dynamic range of maximum transmittivity variation for minimum variation in the refractive index or optical path length of the photo-refractive crystal. The device is applicable to conoscopic holography systems of large dynamic range and to pattern recognition in real time.

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