A technique for optically performing parallel analog-to-digital conversion on incoherent two-dimensional inputs at real-time rates is described. The system uses a birefringent optical real-time input transducer combined with a detector array and optical thresholding. Quantization and bit plane outputs are produced in parallel without scanning. An experimental system with three-bit accuracy is described.
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Armand et al. (1980) studied this question.
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