US4074142A
Expired / Lapsed
US
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Optical cross-point switch
Assignee: Individual
•
Filing: 1975-09-10
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Granted: 1978-02-14
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Expires: 1995-09-10
Abstract
Abstract An optical cross-point switch is disclosed which has the capability of connecting any of a multiplicity of input signals to any of a multiplicity of output lines, in any order in a non-interfering and non-blocking manner. The cross-point switch includes n input circuits (where n is an integer greater than one) and an output circuit associated with each input circuit. An n array of light emitting diodes is connected to each input circuit for transforming input electrical signals applied to the input circuits into optical radiation. A photosensor is connected to each output circuit for transforming incident optical radiation into output electrical signals. A lens, or fiber optic, system is disposed between the light emitting diodes and the photosensors for focusing optical radiations eminating from each array of diodes onto a separate photosensor. An input and output address decoding and selection circuit is coupled to each array of light emitting diodes to selectively enable one diode of each array so that each input circuit may be electro-optically coupled to a selected output circuit.
Inventors
- 👤 Albert S. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:35
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/526; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H04J; H04J14/00; H04J14/08
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
234 words
In an optical cross-point switch, the combination which comprises: a plurality of separate input circuits; a plurality of separate output circuits; an optical matrix connected between the input and output circuits, the matrix including a first set of light emitting units associated with the input circuits and a second set of light sensor units associaed with the output circuits, one of the first and second sets having a number of n units, where n equals an integer, and the other set having a number of arrays of units with each array having a number of n units, one unit in each array of the other set being individually associated with one unit of said one set, each unit of the first set being coupled to a separate input or output circuit and each array of the second set being coupled to a separate input or output circuit, each light emitting unit being arranged to convert an electrical signal into a light signal, each light sensor unit being arranged to convert a light signal into an electrical signal; means for transmitting light signals between each unit of said one set and the associated unit in each array of the other set so that each input circuit may be selectively coupled to any desired output circuit; and means for selectively enabling one unit of each array to thereby connect selected input circuits to selected output circuits.
Claim 2
Dependent Claim
234 words
In an optical cross-point switch, the combination which comprises: a plurality of separate input circuits; a plurality of separate output circuits; an optical matrix connected between the input and output circuits, the matrix including a first set of light emitting units associated with the input circuits and a second set of light sensor units associaed with the output circuits, one of the first and second sets having a number of n units, where n equals an integer, and the other set having a number of arrays of units with each array having a number of n units, one unit in each array of the other set being individually associated with one unit of said one set, each unit of the first set being coupled to a separate input or output circuit and each array of the second set being coupled to a separate input or output circuit, each light emitting unit being arranged to convert an electrical signal into a light signal, each light sensor unit being arranged to convert a light signal into an electrical signal; means for transmitting light signals between each unit of said one set and the associated unit in each array of the other set so that each input circuit may be selectively coupled to any desired output circuit; and means for selectively enabling one unit of each array to thereby connect selected input circuits to selected output circuits.
Claim 3
Dependent Claim
53 words
The combination as defined in claim 1 wherein said one set comprises the light sensor units with one light sensor light sensor unit being coupled to each output circuit and wherein said other set comprises the light emitting units with a separate array of light emitting units being coupled to each input circuit.
Claim 4
Dependent Claim
51 words
The combination as defined in claim 1 wherein said one set comprises the light emitting units with one light emitting unit being coupled to each input circuit and wherein said other set comprises the light sensor units with a separate array of light sensor units being coupled to each output circuit.
Claim 5
Dependent Claim
26 words
The combination as defined in claim 1 wherein the means for transmitting the light signals between the light emitting and sensor units comprises fiber optic bundles.
Claim 6
Dependent Claim
27 words
The combination as defined in claim 1 wherein the means for transmitting the light signals between the light emitting and sensor units comprises a plurality of lenses.
Claim 7
Dependent Claim
16 words
The combination as defined in claim 1 wherein the light emitting units are light emitting diodes.
Claim 8
Dependent Claim
191 words
In an optical cross-point switch, the combination which comprises: a plurality of separate input circuits; a plurality of separate output circuits; an optical matrix connected between the input and output circuits, the matrix including n light emitting units, where n equals an integer, and a set of arrays of light sensor units, one light emitting unit being coupled to each input circuit, one array of light sensor units being coupled to each output circuit, each array of light sensor units having n light sensor units, one light sensor unit in each array being individually associated with one light emitting unit, each light emitting unit being arranged to convert an electrical signal into a light signal, each light sensor unit being arranged to convert a light signal into an electrical signal; means for transmitting light signals between each light emitting unit and the associated light sensor unit in each array of the other set so that each input circuit may be selectively coupled to any desired output circuit; and means for selectively enabling at least one light sensor unit of each array to thereby connect selected input circuits to selected output circuits.
Claim 9
Dependent Claim
191 words
In an optical cross-point switch, the combination which comprises: a plurality of separate input circuits; a plurality of separate output circuits; an optical matrix connected between the input and output circuits, the matrix including n light emitting units, where n equals an integer, and a set of arrays of light sensor units, one light emitting unit being coupled to each input circuit, one array of light sensor units being coupled to each output circuit, each array of light sensor units having n light sensor units, one light sensor unit in each array being individually associated with one light emitting unit, each light emitting unit being arranged to convert an electrical signal into a light signal, each light sensor unit being arranged to convert a light signal into an electrical signal; means for transmitting light signals between each light emitting unit and the associated light sensor unit in each array of the other set so that each input circuit may be selectively coupled to any desired output circuit; and means for selectively enabling at least one light sensor unit of each array to thereby connect selected input circuits to selected output circuits.
Claim 10
Dependent Claim
24 words
The combination as defined in claim 7 wherein the means for selectively enabling light sensor units comprises a binary address decoding and selection circuit.
Claim 11
Dependent Claim
25 words
The combination as defined in claim 7 wherein the means or transmitting light signals between the light emitting and sensor units comprises fiber optic bundles.
Claim 12
Dependent Claim
26 words
The combination as defined in claim 7 wherein the means for transmitting light signals between the light emitting and sensor units comprises a plurality of lenses.
Claim 13
Dependent Claim
28 words
The combination as defined in claim 10 wherein the plurality of lenses includes a separate relay lens for each array of light sensor units and an objective lens.
Claim 14
Dependent Claim
16 words
The combination as defined in claim 7 wherein the light emitting units are light emitting diodes.
Claim 15
Dependent Claim
17 words
The combination as defined in claim 7 wherein n equals the number of input and output circuits.
Claim 16
Dependent Claim
191 words
In an optical cross-point switch, the combination which comprises: a plurality of separate input circuits; a plurality of separate output circuits; an optical matrix connected between the input and output circuits, the matrix included n arrays of light emitting units and n light sensor units, where n equals an integer, one array of light emitting units being connected to each input circuit, one light sensor unit being connected to each output circuit, each light emitting unit being arranged to convert an electrical signal applied to the associated input circuit into a light signal, each light sensor unit being arranged to convert a light signal incident thereon into an electrical signal; one unit in each array of light emitting units being associated with one light sensor unit whereby each of said light sensor units will be illuminated with light from said associated light emitting unit; means for transmitting light signals between each light emitting unit in each array of light emitting units and the associated light sensor unit; and means for selectively enabling at least one light emitting unit of each array to thereby connect selected input circuits to selected output circuits.
Claim 17
Dependent Claim
191 words
In an optical cross-point switch, the combination which comprises: a plurality of separate input circuits; a plurality of separate output circuits; an optical matrix connected between the input and output circuits, the matrix included n arrays of light emitting units and n light sensor units, where n equals an integer, one array of light emitting units being connected to each input circuit, one light sensor unit being connected to each output circuit, each light emitting unit being arranged to convert an electrical signal applied to the associated input circuit into a light signal, each light sensor unit being arranged to convert a light signal incident thereon into an electrical signal; one unit in each array of light emitting units being associated with one light sensor unit whereby each of said light sensor units will be illuminated with light from said associated light emitting unit; means for transmitting light signals between each light emitting unit in each array of light emitting units and the associated light sensor unit; and means for selectively enabling at least one light emitting unit of each array to thereby connect selected input circuits to selected output circuits.
Claim 18
Dependent Claim
24 words
The combination as defined in claim 14 wherein the means for selectively enabling light sensor units comprises a binary address decoding and selection circuit.
Claim 19
Dependent Claim
25 words
The combination as defined in claim 14 wherein the means for transmitting light signals between the light emitting and sensor units comprises fiber optic bundles.
Claim 20
Dependent Claim
26 words
The combination as defined in claim 14 wherein the means for transmitting light signals between the light emitting and sensor units comprises a plurality of lenses.
Claim 21
Dependent Claim
28 words
The combination as defined in claim 17 wherein the plurality of lenses includes a separate relay lens for each array of light sensor units and an objective lens.
Claim 22
Dependent Claim
16 words
The combination as defined in claim 14 wherein the light emitting units are light emitting diodes.
Claim 23
Dependent Claim
17 words
The combination as defined in claim 14 wherein n equals the number of input and output circuits.
References Cited (Backward Citations)
US2599368A
Cited
US2855539A
Cited
US3432675A
Cited
US3492484A
Cited
US3604936A
Cited
US3676864A
Cited
US3887906A
Cited
US3911410A
Cited
US3899778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |