SOVIETS COMBINE NEUROSCIENCE AND OPTICAL PROCESSING TECHNIQUES TO DEVELOP AN OPTICAL BRAIN

CIA-STARGATE

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Summary: This document, released by the CIA's Stargate program, discusses Soviet engineers' development of a device that mimics the human brain using advanced electrooptics technology. The device is structured similarly to the human brain but uses a threshold filter, photocell, laser, and hologram for processing information. The interconnections in this device are made optically, which overcomes the limitations of microelectronic circuits in simulating the structure of the human brain. The document emphasizes the potential advantages of the Soviet analog brain in terms of processing power and information leakage.

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Body:  *Appi~oVed Por'ReIeas~e 2000108`/15 :*CrA R[ P96=~OV12Fk0O0800260(~01-,t  *  *
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 DCC DATE:
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 CLASSIF ;                    :P1F   NTIAL
 DWNGRADE;                               CL:= SI IED BY: MULTIPLE SOURCES; DECLASSIFY ON:
 OR cIL TINE AGENCY'S DETERMINATION' REQUIRED
 RELEASE:                                OF~-N (OC)
 DISTRIB:                                RE~:EASE LIMITED TO A~'MIC, DIA/DT, FSTC, FTD, MSIC, NISC
 (ST)
 TEXT: ENTIRE.      THIS  INPUT  UNIT  IS  MARKED  ACCORDING  TO  THE  OVERALL
 RELEASABILITY  RESTRICTION  OF THE SOURCE DOCUMENT.  TEXT CONTAINS NO
 RELEASABILITY MARKINGS.
 *U*  WITH  ADVANCED  ELECTROOPTICS  TECHNOLOGY, SOVIET ENGINEERS HAVE
 DEVELOPED  A  DEVICE  THAT MIMICS THE HUMAN BRAIN IN THE WAY THAT THE
 BRAIN  PROCESSES INFORMATION.  LIKE THE REAL THING, THE SOVIET ANALOG
 IS  A  MULTILEVEL  NETWORK  OF  NERVE  CELLS.   THE  NATURAL BRAIN, A
 PARALLEL  PROCESSOR,  CONSISTS  OF  ABOUT  10EXP11  NEURONS  OR NERVE
 CELLS,   BUT   THE  GREATER  VOLUME  IS  MADE  UP  OF  ABOUT  10EXP14
 INTERCONNECTIONS   AMONG   THESE  NEURONS.   THE  SOVIET  ANALOG  IS
 STRUCTURED  SIMPLISTICALLY  THE SAME WAY BUT USES A THRESHOLD FILTER,
 PHOTOCELL,  LASER,  AND  HOLOGRAM  OPERATING  IN  SERIES AS THE BASIC
 ELEMENT.  INTERCONNECTIONS ARE MADE OPTICALLY.
 *U*  THE SOVIET NEURON WORKS IN 'THIS WAY: WHEN AN INPUT SIGNAL (S) IN
 THE  FORM  OF  LIGHT  IRRADIATES'THE PHOTOCELL, ITS OUTPUT DRIVES THE
 LASER,  WHICH  PRODUCES  AN OUTPUT THAT IS SPLIT AND MODULATED BY THE
 HOLOGRAM.   AFTER  BEING SPLIT, 'THE LASER ACTIVATES THE PHOTOCELLS AT
 THE  NEXT LEVEL.  INFORMATION STORED ON THE HOLOGRAMS CONSTITUTES THE
 PROGRAM  AND  DETERMINES  THE INTERCONNECTIONS FOR TIE OPTICAL BRAIN.
 THE  THRESHOLD  FILTER  SETS  THE  MINIMUM  LIGHT  LEVEL  REQUIRED TO
 ACTIVATE THE PHOTOCELL.
 *U*  IN THE REAL BRAIN, THESE INTERCONNECTIONS CAN NUMBER IN THE TENS
 OF  THOUSANDS  PER  NEURONS.  STATE-OF-THE-ART MICROELECTRONICS COULD
 NOT  BE  USED TO SIMULATE THIS STRUCTURE AND STAY WITHIN A REASONABLE
 SIZE.   IN  ADDITION  TO  BEING 'LIMITED  BY  PACKING  DENSITY OF THE
 CONNECTIONS  BETWEEN  NEURONS,  MICROELECTRONIC  CIRCUITS SUFFER FROM
 THE  POTENTIAL  FOR  INFORMATION' LEAKAGE  FROM CROSS TALK (UNDESIRED
 TRANSFER  OF  SIGNALS). INTERCONNECTIONS BY OPTICAL RADIATION ARE NOT
 BOUND BY EITHER RESTRICTION.
 * * * * * * * * * * * * * * * * *'* * * * * * * * * * * * * * * *
 CONFIDENTIAL                      PAGE     14
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 Approved For Release 2000/08/15: CIA-RDP96-00792R000500260001-4
 CONFIDENTIAL
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