Apparatus for evaluating a polynomial function using an array of

Details Apparatus for evaluating a polynomial function using an array of Apparatus for evaluating a polynomial function using an array of

1983-01-19

1985-10-01

Sikes, William L.

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350 9610, 350 9613, 350 9618, 350353, 350355, 350356, 350358, 364130, 364194, 364800, 364807, 364808, 364819, 364821, 364822, 364841, 364861, 364862, G02B 514, G02B 5172

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045442290

ABSTRACT:
Methods and apparatus for providing an optical analog quantity proportional to ##EQU1## Input light (a.sub.4) of intensity proportional to a.sub.n is directed (21,31) to the input end of an nth optical module comprising a modulator (22) whose output light intensity is responsive to an electrical potential difference across it and a beam combiner (23). While the light is passing through the modulator (22), a potential difference (24) is applied across it such that the intensity of the output light from the modulator (22) is proportional to a.sub.n x, and this light (a.sub.4 x) is directed, through the beam combiner (23), to the output end of the optical module. Input light (a.sub.3) of intensity proportional to a.sub.n-1 is directed (25), via the beam combiner (23), to the output end of the optical module, to combine with the light from the modulator (22) so that the intensity of the output light (32) from the nth optical module is proportional to a.sub.n x+a.sub.n-1 ; this light is directed to the input end of an (n-1)th optical module essentially similar to the nth; and so on in the same manner; and finally to the first module, so that its output light has an intensity proportional to p(x).

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