Abstract
The basic principle of operation of each bit in a matrix of image detectors is described, together with the derivation of appropriate operating formulas. The necessary circuitry to make a functional two-dimensional array is also described, including the scanning circuitry integrally constructed with the photodetector matrix. The necessary design considerations for operation of the matrix are discussed in the context of the currently operating 10-by-10 array. Extension of the principles to larger arrays is outlined in the two modes of array scanning considered, with special reference to spatial noise problems. The paper concludes with reference to other applications of the basic principle, such as card reading.
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