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Applied Optics

Applied Optics


  • Vol. 28, Iss. 7 — Apr. 1, 1989
  • pp: 1429–1435

Frequency multiplexed raster neural networks. 1: Theory

Gabriel Y. Sirat, Alain D. Maruani, and Raymond C. Chevallier  »View Author Affiliations

Applied Optics, Vol. 28, Issue 7, pp. 1429-1435 (1989)

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In the first part of this paper we present frequency multiplexed raster (FMR) optical implementation of neural networks. A hidden difficulty for hardware (optical and electronic) implementation is that the dimension of the synaptic matrix is twice that of the input and output matrices or vectors. For 2-D images, which is we believe one of the greatest potentialities of neural networks, the synaptic matrix is 4-D and cannot be directly implemented in optics. We propose FMR as a method to fold this matrix into a 2-D format. In the second part of this paper we describe the system built in our laboratory showing the feasibility of FMR optical neural networks. The system is built from an optical input module, a fixed synaptic matrix coded on a transparency, a CCD camera, and a microcomputer which performs the thresholding and feedback operations. In a later stage the fixed matrix will be replaced by a programmable matrix.

© 1989 Optical Society of America

Original Manuscript: April 16, 1988
Published: April 1, 1989

Gabriel Y. Sirat, Alain D. Maruani, and Raymond C. Chevallier, "Frequency multiplexed raster neural networks. 1: Theory," Appl. Opt. 28, 1429-1435 (1989)

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