US3561870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image motion detection system
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1967-12-18
•
Granted: 1971-02-09
•
Expires: 1987-12-18
Abstract
Abstract AN IMAGE MOTION DETECTION SYSTEM IN WHICH AN OPTICAL IMAGE OF AN OBSERVED OBJECT IS VELOCITY MODULATED AT A GIVEN FUNDAMENTAL FREQUENCY ON THE TARGET OF A LIGHT INTEGRATING DEVICE SUCH AS THAT PRESENT IN A VIDICON CAMERA. THE HIGH FREQUENCY VIDEO OUTPUT OF THE VIDICON CAMERA IS FILTERED AT THE FUNDAMENTAL FREQUENCY AND COMPARED TO THE MODULATION PHASE TO PRODUCE AN OUTPUT REPRESENTING BOTH THE MAGNITUDE AND SENSE OF RELATIVE MOVEMENT EXISTING BETWEEN THE OBSERVED OBJECT AND THE SYSTEM.
Inventors
- 👤 Donald C Redpath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:42
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |