Optical matrix multiplier

Details Optical matrix multiplier Optical matrix multiplier

1983-12-23

1986-10-28

Malzahn, David H.

Boots, shoes, and leggings

364713, G06G 900, G06F 756

Patent

active

046202935

ABSTRACT:
An optical computing system is provided for performing a linear multiplication operation involving a matrix with bipolar values. A plurality of beams representing the values of a N.times.1 column matrix Q illuminate an optical mask having elements disposed in a two-dimensional (M+1).times.N array. Each element of the first M rows of the mask represents the offset of the value of a corresponding element in a known M.times.N matrix by a scalar constant c. Each element of row M+1 of the mask represents the value c. An array of photodetectors collects the light passing through the mask, with the light from each row of elements detected by a respective photodetector. The outputs of the first M photodetectors represent the product of Q and M after M has been offset by c. The output of photodetector M+1 represents the scalar value produced by the multiplication of Q and a row matrix represented by row M+1 of the mask matrix. This scalar value can be used to adjust the outputs of the first M photodetectors, the result being equivalent to Q.multidot.M.

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G. Fan, "Optical Matrix Inverter", IBM Technical Disclosure Bulletin, vol. 6, No. 1, Jun. 1963, p. 131.

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