Title:
多層光電子ニューラルネットワーク
Document Type and Number:
Japanese Patent JP3638951
Kind Code:
B2
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.
Inventors:
Stall, Harold M
Rays, James Jay
Rays, James Jay
Application Number:
JP50580395A
Publication Date:
April 13, 2005
Filing Date:
June 07, 1994
Export Citation:
Assignee:
NORTHROP GRUMMAN CORPORATION
International Classes:
G02F3/00; G03H1/04; G03H1/16; G03H1/18; G06E3/00; G06G7/60; G06K9/74; G06K9/76; G06N3/067; (IPC1-7): G06E3/00; G03H1/18; G06G7/60
Domestic Patent References:
| JP4005636A | ||||
| JP4042134A | ||||
| JP4217014A |
Foreign References:
| US5121228 |
Attorney, Agent or Firm:
Kazuo Moriya