Optical neural network system
AssigneeHitachi, Ltd.
InventorsPaul Horan, Akira Arimoto
Life of this patent
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Abstract
An optical system of an optical neural network model for parallel data processing is disclosed. Taking advantage of the fact that an auto-correlation matrix is symmetric with respect to a main diagonal and the weights for modulating the values of diagonals of the auto-correlation matrix are equal to each other, the configuration of an optical modulation unit is simplified by a one-dimensional modulation array on the one hand, and both positive and negative weights are capable of being computed at the same time on the other hand. In particular, the optical system makes up a second-order neural network exhibiting invariant characteristics against the translation and scale.
Claims9
An optical system comprising a first modulation means including a pair of modulation arrays arranged in a direction perpendicular to each other for modulating a light source in accordance with an input signal thereby to produce an auto-correlation matrix of the input signal, a second modulation means for dividing the auto-correlation matrix into two matrices about a main diagonal of the auto-correlation matrix for simultaneous modulation thereof with positive and negative weights, respectively, and detection means, for converting the light source modulated with the positive and negative weights into electrical signals, respectively.
Dependencies are inferred from the claim text.