US3697760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical-electrical movement detector utilizing staggered rows of photodetectors and logic for determining the location of a luminous spot
Assignee: Alcatel Lucent SAS
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Filing: 1971-08-17
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Granted: 1972-10-10
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Expires: 1991-08-17
Abstract
Abstract An optical-electrical detecting device comprising a series of staggered photo-sensitive diodes are appropriately connected to electronic circuits for providing a signal corresponding to the position of a relatively small luminous spot. The photo-diodes are arranged in two rows and are separated by baffle reflectors for providing a signal through logic gates to an integrated parity control circuit for defining the position of the luminous spot.
Inventors
- 👤 Jean-Pierre Biet
- 👤 Quang Tan Nguyen
- 👤 Gerard Peres
- 👤 Gerard Ripoche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:28
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/783; G01S3/784; H; H04; H04N; H04N25/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
An optical-electrical movement detector comprising a first strip of optical-electrical elements capable of generating an electrical output when activated with light; a second strip of optical-electrical elements arranged adjacent, but staggered in relationship to the first strip, each strip having portions between the optical-electrical elements that are not responsive to light; means for generating and sweeping a luminous spot across the strip of optical-electrical elements, the luminous spot having a dimension parallel to the length of the strip so that it can only illuminate either one of the optical-electrical elements, or the non-responsive portion of a strip, the luminous spot having a perpendicular dimension that includes the combined width of both the first and second strips; an integrated circuit means connected to the first and second strip elements for generating signals in response to the luminous spot, and logic means for receiving the output signals from each opticalelectrical element and adapted to indicate the exact location of the luminous spot whereby the luminous spot will alternately activate only one optical-electrical element in one row and then activate one optical element in both rows.
Claim 2
Dependent Claim
183 words
An optical-electrical movement detector comprising a first strip of optical-electrical elements capable of generating an electrical output when activated with light; a second strip of optical-electrical elements arranged adjacent, but staggered in relationship to the first strip, each strip having portions between the optical-electrical elements that are not responsive to light; means for generating and sweeping a luminous spot across the strip of optical-electrical elements, the luminous spot having a dimension parallel to the length of the strip so that it can only illuminate either one of the optical-electrical elements, or the non-responsive portion of a strip, the luminous spot having a perpendicular dimension that includes the combined width of both the first and second strips; an integrated circuit means connected to the first and second strip elements for generating signals in response to the luminous spot, and logic means for receiving the output signals from each opticalelectrical element and adapted to indicate the exact location of the luminous spot whereby the luminous spot will alternately activate only one optical-electrical element in one row and then activate one optical element in both rows.
Claim 3
Dependent Claim
27 words
An optical-electrical movement detector as in claim 1, where the length of the optical-electrical elements is three times the length of the portions not responsive to light.
Claim 4
Dependent Claim
73 words
An optical-electrical movement detector as in claim 1, where the logic means includes at least one integrated parity check circuit, the integrated parity check circuit having separate terminals connected to each optical-electrical element and supplying, depending upon the number of illuminated elements, an even number or an odd number with corresponding logic 1 or 0 signals at their first even output and logic 0 or 1 signals at their second odd output respectively.
Claim 5
Dependent Claim
49 words
An optical-electrical movement detector as in claim 3, where the logic means further includes a plurality of AND gates corresponding to the number of position intervals, each gate having two inputs with one input connected to an optical-electrical element and the other input connected to a second odd output.
Claim 6
Dependent Claim
55 words
An optical-electrical movement detector as in claim 3, where the logic means further includes a plurality of AND gates corresponding to the number of position intervals, each gate having three inputs with two inputs connected to an optical-electrical element and the other input connected to the first even output of the integrated parity check circuit.
References Cited (Backward Citations)
US3555285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |