Device for terrain photography by means of scanning systems
Abstract
Abstract IN AIRBORNE EQUIPMENT FOR SURVEYING TERRAIN, IN PARTICULAR BY INFRARED PHOTOGRAPHY, WHICH INCLUDES A MIRROR ROTATING AT A CONSTANT SPEED TO SCAN THE TERRAIN IN A SERIES OF PARALLEL STRIPS EXTENDING TRANSVERSE TO THE LINE OF FLIGHT OF THE AIRCRAFT AND APPARATUS FOR PROJECTING THE IMAGES THUS OBTAINED ONTO A MOVING FILM, THE IMPROVEMENT OF APPARATUS FOR VARYING THE FIELD OF VIEW OF THE SCANNING MECHANISM PROPORTIONAL TO THE V/H RATIO OF THE AIRCRAFT SO THAT THE SCANNED TERRAIN STRIPS ABUT TO YIELD A PHOTOGRAPHIC REPRODUCTION OF THE TERRAIN HAVING NO OMITTED PORTIONS AND SUBSTANTIALLY NO DUPLICATED PORTIONS. THREE EMBODIMENTS OF DEFOCUSING SYSTEMS FOR CARRYING OUT THE INVENTION ARE DESCRIBED.
Inventors
- 👤 Huibert J Dirksen
- 👤 Arie N De Jong
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |