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US3793523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the detection of moving objects
Assignee: US Philips Corp
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Filing: 1973-05-25
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Granted: 1974-02-19
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Expires: 1993-05-25
Abstract
Abstract A device is described for the detection of moving objects, comprising an optical imaging system, a radiation-sensitive detection system for converting radiation emerging from the imaging system into electrical signals, and an electronic circuit for processing the signals. By composing the detection system of four separate detection elements which are arranged in line in the direction in which an image of an object travels, a timedifferentiated signal can be obtained.
Inventors
- 👤 F Desvignes
- 👤 M Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:20
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36; Y; Y10; Y10S; Y10S250/00; Y10S250/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A device for the detection of moving objects, comprising an optical imaging system, a radiation-sensitive detction system for converting radiation emerging from the imaging system into electric signals, and an electronic circuit for processing said signals, characterized in that the detection system comprises four separate radiation-sensitive detection elements which are arranged in line in the direction in which an image of an object travels, the output terminals of the detection elements being interconnected in such a way that the signal at the two output terminals of the complete detection system is the time derivative of the signal which would be produced if a single detector were used.
Claim 2
Independent Claim
107 words
A device for the detection of moving objects, comprising an optical imaging system, a radiation-sensitive detction system for converting radiation emerging from the imaging system into electric signals, and an electronic circuit for processing said signals, characterized in that the detection system comprises four separate radiation-sensitive detection elements which are arranged in line in the direction in which an image of an object travels, the output terminals of the detection elements being interconnected in such a way that the signal at the two output terminals of the complete detection system is the time derivative of the signal which would be produced if a single detector were used.
Claim 3
Dependent Claim
37 words
A device as claimed in claim 1, characterized in that the reference signal with which the output signal of the detection system is compared in the electronic circuit comprises a positive, a negative and a zero level.
Claim 4
Dependent Claim
52 words
A device as claimed in claim 1, characterized in that the four radiation-sensitive detection elements consist of bolometer elements, which are bounded by electrodes, a supply soUrce being connected between the interconnected outer electrodes and the inner electrode, the interconnected, remaining electrodes being connected to an input of the electronic processing circuit.
Claim 5
Dependent Claim
68 words
A device as claimed in claim 1, characterized in that the four radiation-sensitive detection elements are photo-diodes, a first supply source being connected to the even-numbered photo-diodes and a second supply source to the odd-numbered photo-diodes, whilst the output terminals of the centre photo-diodes, which are each connected to the output terminals of the adjacent outer photo-diode, are coupled to the input terminals of the electronic processing circuit.
Claim 6
Dependent Claim
42 words
A device as claimed in claim 1, characterized in that the four-radiation-sensitive detection elements are photo-cells, the terminals of the centre photo-cells, which are each connected to the adjacent outer photo-cell, are coupled to the input terminals of the electronic processing circuit.
References Cited (Backward Citations)
US2813983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |