Phase-only matched filtering with dual liquid-crystal spatial light modulators

A real-time optical processing system with dual liquid-crystal spatial light modulators is presented that have been used as an amplitude input and a multilevel phase-only filter, respectively. Numerical calculations are performed for a gray-level and binarized amplitude- phase correlations. An improvement of performance criteria such as discrimination capability, light efficiency, and signal-to-noise ratio has been made for an amplitude in a binary mode to phase correlator. The higher the threshold level of binarized objects is, the better performance criteria produce. Optical experimental results supporting with calculations are described.

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