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We have experimentally demonstrated the feasibility of a scale, rotation, and translation invariant all-optical processor for automatic target recognition. This simple processor consists of a single Fourier lens and uses a phase-coded input image of the target obtained by the recording of the original image onto a phase-only material through a Ronchi-type grating. A logarithmic distance measure is introduced to separate two classes of targets under the experiment. A real-time implementation of the processor is suggested utilizing a specially designed spatial light modulator.

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System concept implementation for the remote illumination system (RIS) design has been discussed. The relationship between application criteria and system specifications is formulated based on the RIS configuration. An engineering approach to RIS design, evaluation and optimization using system efficiency calculation is described.