OPTICAL NEURO-COMPUTER

Japanese Patent JPH0274933

A

PURPOSE:To optically execute an intellectual information processing of a complicated pattern recognition, etc. which necessitate a learning function by constituting the coupling strength of neurones between each layer, of a real time hologram, and constituting an intermediate layer, an output layer and an error correcting signal generating part, of a space optical modulator or a non-linear light optical element. CONSTITUTION:When a hologram 28 is irradiated by an optical input signal 27, a diffracted light 29 is outputted, and this diffracted light is brought to threshold processing optically by an intermediate layer 6, and thereafter, radiated to a hologram 34, and this diffracted light 36 is brought to threshold processing optically by an output layer 10, and thereafter, outputted as an optical output signal 11. On the other hand, in an error correcting signal generating part 13, an error signal is generated from a difference between the optical output signal 11 and a teacher signal 12 applied from the outside, and this error signal is fed back to the hologram 28 and recorded. That is, by error signals 14, 16, weight of coupling between neurones between the intermediate layer 6 and the output layer 10, between an input layer 2 and the intermediate layer 6, and plural intermediate layers 6 is corrected, and learning is executed. In such a way, an optical neuro-computer for executing an intellectual information knowledge of a complicated pattern recognition, etc. which necessitate a learning function by utilizing an advantage of a parallel property and a high speed property, etc. can be realized.

YOSHINAGA HISAO
KITAYAMA KENICHI

JP22635588A

March 14, 1990

September 12, 1988

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NIPPON TELEGRAPH & TELEPHONE

G02F3/00; G06E3/00; G06F15/18; G06N3/067; G06N99/00; (IPC1-7): G02F3/00; G06E3/00; G06F15/18

Masataka Kobayashi

Next Patent: JPH0274934