Accession Number : ADD011252

Title :   Electrooptical Matrix Multiplication Using the Twos Complement Arithmetic for Improved Accuracy.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bocker,R P ; Clayton,S R ; Bromley,K

Report Date : 21 May 1984

Pagination or Media Count : 20

Abstract : This invention is directed to providing an apparatus and method for improving accuracy in an electooptical matrix-matrix multiplier by using twos complement arithmetic. A source of pulsed collimated light illuminates a first matrix of optical encoded information of numbers in the twos complement binary representation and a second matrix of optical encoded information of numbers in the twos complement binary representation that mutually orthogonally are displaced with respect to one another in synchronization with the pulsing of the collimated light source. A photodetector array is located to add multiplied encoded information of numbers in the twos complement binary representation of the first matrix providing means and the second matrix providing means to be expressed as mixed binary representation signals. A suitable decoder is coupled to the photodetector array for decoding the mixed binary representation signals into twos complement binary representations or digital representations for use by interconnected processing devices. Staggering the encoded twos complement binary representations of one matrix of information and orthogonally advancing it with respect to the other matrix of information allos the addition of multiplied mixed binary representations by the photodetector array to provide accurate representations of decimal mathematical numbers.

Descriptors :   *Patent applications, *Optical processing, *Processing equipment, *Electrooptics, Signal processing, Matrices(Mathematics), Multiplication, Coding, Architecture, Optical data, Accuracy, Light pulses, Photodetectors, Arrays, Decoding, Two dimensional, Light modulators, Light sources

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE