| 摘要 |
A system for performing real time optical comparisons using an optical correlator (10) permits comparing a sampled image (28) to a wide variety of reference images (37) through the utilization of a multiple quantum well spatial light modulator (36) which is utilized to rapidly present a large number of reference images (37) for correlation. The utilization of the multiple quantum well spatial light modulator (36) as the spatial light modulator in a van der Lugt image correlator (10) in combination with a spectrometer (50) permits optical comparisons at 300,000 frames per second versus 10,000 frames per second, the best case for liquid crystal based spatial light modulators.
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