US5220644A
Expired / Lapsed
US
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Optical neural network system
Assignee: Hitachi Ltd
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Filing: 1992-01-21
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Granted: 1993-06-15
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Expires: 2012-01-21
Abstract
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.
Inventors
- 👤 Paul Horan
- 👤 Akira Arimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:41
CPC Classifications
G; G06; G06N; G06N3/00; G06N3/02; G06N3/06; G06N3/067; G06N3/0675; G06E; G06E3/00; G06E3/001; G06E3/005
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
105 words
An optical system for a second-order neural network, comprising: a plurality of light sources arranged in a predetermined direction for producing an output light intensity-modulated in accordance with weights; modulation units for modulating the output light from the plurality of light sources in accordance with an input signal and producing an auto-correlation matrix symmetric with respect to a main diagonal crossing at right angles to the arrangement of the plurality of the light sources; and detection units for receiving the output light of the modulation unit on both sides of the main diagonal and converting the same output light into a plurality of electrical signals.
Claim 2
Dependent Claim
105 words
An optical system for a second-order neural network, comprising: a plurality of light sources arranged in a predetermined direction for producing an output light intensity-modulated in accordance with weights; modulation units for modulating the output light from the plurality of light sources in accordance with an input signal and producing an auto-correlation matrix symmetric with respect to a main diagonal crossing at right angles to the arrangement of the plurality of the light sources; and detection units for receiving the output light of the modulation unit on both sides of the main diagonal and converting the same output light into a plurality of electrical signals.
Claim 3
Dependent Claim
17 words
The optical system according to claim 1, wherein the plurality of light sources are a one-dimensional array.
Claim 4
Dependent Claim
29 words
The optical system according to claim 1, wherein the detection units include a photodetector for producing an inner product of elements on the main diagonal of the auto-correlation matrix.
Claim 5
Dependent Claim
18 words
The optical system according to claim 3, wherein an output of the photodetector is used for error monitoring.
Claim 6
Dependent Claim
18 words
The optical system according to claim 3, wherein an output of the photodetector is used for threshold control.
Claim 7
Dependent Claim
36 words
The optical system according to claim 1, wherein the plurality of light sources are a surface light-emitting array having a plurality of lines for separating a light-emitting region in a direction parallel to the main diagonal.
Claim 8
Dependent Claim
30 words
The optical system according to claim 6, wherein the detection units further include a photodetector for producing an inner product of elements on the main diagonal of the auto-correlation matrix.
Claim 9
Dependent Claim
18 words
The optical system according to claim 7, wherein an output of the photodetector is used for error monitoring.
Claim 10
Dependent Claim
18 words
The optical system according o claim 7, wherein an output of the photodetector is used for threshold control.
Claim 11
Dependent Claim
80 words
An optical system for a second-order neural network, comprising: a plurality of modulation units, for producing an auto-correlation matrix rom an input signal, including a modulation means for modulating an output light with weights corresponding to elements positioned on each diagonal parallel to a main diagonal of the auto-correlation matrix; and detection units for receiving the output light from the modulation units on both sides of the main diagonal and converting the output light into a plurality of electrical signals.
Claim 12
Dependent Claim
80 words
An optical system for a second-order neural network, comprising: a plurality of modulation units, for producing an auto-correlation matrix rom an input signal, including a modulation means for modulating an output light with weights corresponding to elements positioned on each diagonal parallel to a main diagonal of the auto-correlation matrix; and detection units for receiving the output light from the modulation units on both sides of the main diagonal and converting the output light into a plurality of electrical signals.
Claim 13
Dependent Claim
57 words
The optical system according to claim 10, wherein the modulation means includes a focus optical system for focusing the output light along a direction crossing at right angles to the main diagonal of the auto-correlation matrix and a one-dimensional modulation array for modulating the output light focused by a focus optical system in accordance with the weights.
Claim 14
Dependent Claim
24 words
The optical system according to claim 11, wherein the modulation means includes a plurality of focus optical systems and a plurality of modulation arrays.
Claim 15
Dependent Claim
29 words
The optical system according to claim 11, wherein the detection units include a photodetector for producing an inner product of elements on the main diagonal of the auto-correlation matrix.
Claim 16
Dependent Claim
18 words
The optical system according to claim 13, wherein an output of the photodetector is used for error monitoring.
Claim 17
Dependent Claim
18 words
The optical system according to claim 13, wherein an output of the photodetector is used for threshold control.
Claim 18
Dependent Claim
36 words
The optical system according to claim 10, wherein the modulation means includes a plurality of light sources arranged in a direction perpendicular to the main diagonal for producing a light intensity-modulated in accordance with the weights.
Claim 19
Dependent Claim
23 words
The optical system according to claim 16, including light sources comprising a one-dimensional array arranged in a direction perpendicular to the main diagonal.
Claim 20
Dependent Claim
30 words
The optical system according to claim 17, wherein the detection units further include a photodetector for producing an inner product of elements on the main diagonal of the auto-correlation matrix.
Claim 21
Dependent Claim
18 words
The optical system according to claim 18, wherein an output of the photodetector is used for error monitoring.
Claim 22
Dependent Claim
18 words
The optical system according to claim 18, wherein an output of the photodetector is used for threshold control.
Claim 23
Dependent Claim
37 words
The optical system according to claim 16, wherein the plurality of the light sources are a surface light-emitting array having a plurality of lines for separating a light-emitting region in a direction parallel to the main diagonal.
Claim 24
Dependent Claim
31 words
The optical system according to claim 21, wherein the detection units further include a detector for producing an inner product of the elements on the main diagonal of the auto-correlation matrix.
Claim 25
Dependent Claim
18 words
The optical system according to claim 22, wherein an output of the photodetector is used for error monitoring.
Claim 26
Dependent Claim
18 words
The optical system according to claim 22, wherein an output of the photodetector is used for threshold control.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |