Multi-layer opto-electronic neural network

Details Multi-layer opto-electronic neural network Multi-layer opto-electronic neural network

1993-07-30

1996-03-05

Dzierzynski, Paul M.

Optical: systems and elements

Holographic system or element

Fourier transform holography

359 4, 359 11, 359559, 359561, 382156, 382159, G03H 116, G02B 2746

Patent

active

054972531

ABSTRACT:
A pattern recognition apparatus and a method for operating same. The apparatus includes a volume holographic medium (4) having a plurality of Fourier-space volume holograms representing pattern templates stored within. The apparatus further includes a spatial light modulator (1) and a phase encoder (2). The phase encoder has an output optically coupled to the medium by a first Fourier transform lens (3). The spatial light modulator spatially modulates a spatially uniform laser beam (7) in accordance with an unknown pattern. The two-dimensional phase encoder causes the spatially modulated laser beam to be spatially distributed prior to application to the medium. The apparatus also includes a detector (6, 11) having an input optically coupled by a second Fourier transform lens (5) means to an angular spectrum of plane waves generated by the medium in response to the output of the spatial modulator, phase encoder, and first Fourier lens. The detector detects plane waves that correspond to vector inner products generated within medium (4) in response to the unknown pattern. The apparatus further contains a means (12) for nonlinearly processing the output of detector (6, 11) and a means (13) by which the output of nonlinear processing means (12) may be temporarily stored.

REFERENCES:
patent: 3995948 (1976-12-01), Abe et al.
patent: 4949389 (1990-08-01), Allebach et al.
patent: 5028102 (1991-07-01), Ogura et al.
patent: 5121228 (1992-06-01), Paek
patent: 5129041 (1992-07-01), Pernick et al.
patent: 5132813 (1992-07-01), Caulfield et al.
patent: 5220618 (1993-06-01), Sirat et al.
patent: 5235439 (1993-08-01), Stoll
patent: 5235440 (1993-08-01), Clark et al.
patent: 5293456 (1994-03-01), Guez et al.
patent: 5317651 (1994-05-01), Refregier et al.
patent: 5323472 (1994-06-01), Falk
D. A. Gregory and H. K. Liu, "Large-Memory Real-Time Multichannel Multiplexed Pattern Recognition", Applied Optics 23/24, pp. 4560-4570, 15 Dec. 1984.
T. Jannson, et al., "The Interconnectability of Neuro-Optic Processors", SPIE, vol. 698, pp. 157-169, 1986.
D. L. Staeber, et al., "Multiple Storage and Erasure of Fixed Holograms in Fe-Doped LiNbo.sub.3 " Applied Physics Letters, vol. 26, No. 4, pp. 182-184, 15 Feb. 1975.
C. N. Kurtz, "Transmittance Characteristics of Surface Diffusers and the Design of Nearly Band-Limited Binary Diffusers", J. Opt. Soc. Amer., vol. 62, No. 8, pp. 982-989, Aug. 1972.
Gabor, "Character Recognition By Holography", Nature, 208, pp. 422-423, 1965.
J. T. LaMacchia and D. L. White, "Coded Multiple Exposure Holograms", Applied Optics, 7, pp. 91-94, Jan. 1968.
J. R. Leger and Sing H. Lee, "Hybrid Optical Processor For Pattern Recognition and Classification Using A Generalized Set Of Pattern Functions", Applied Optics, 21, pp. 274-287, 15 Jan. 1982.

Affiliated with

Also associated with

Rating

Multi-layer opto-electronic neural network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-layer opto-electronic neural network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer opto-electronic neural network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1416382