US3653307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for compensating cylindrical distortion in panoramic aerial photographs
Assignee: Optische Industrie de Oude Delft NV
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Filing: 1969-08-25
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Granted: 1972-04-04
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Expires: 1989-08-25
Abstract
Abstract For compensating cylindrical distortion in panoramic aerial recordings an array of parallel light conducting fibers is used whose entrance surface is concave and circle-cylindrical, and whose exit surface has a convex cylindrical shape so calculated that the cylindrical distortion of a panoramic image focused on the entrance surface of the array, or of an original aerial photographic transparency placed on that surface, is compensated for the exit surface.
Inventors
- 👤 Gerard Andries Scheltema Heere
- 👤 Rinze Veenenga Kingma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
G; G03; G03B; G03B37/00; G03B37/02; G03B15/00; G03B27/00; G03B27/32; G03B27/52; G03B27/68
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
181 words
A device for compensating cylindrical distortion in panoramic aerial recordings comprising a fiber optical array consisting of a large number of parallel light conducting fibers optically insulated one from another, which array has an elongated active cross-section and end surfaces having mutually parallel generatrices, one of the end surfaces (the entrance surface) being concave and arcuate and the other end surface (the exit surface) being convex and complying with the formula: in which r the radius of curvature of the entrance surface; phi the scanning angle, this is the angle subtended by the arc in the entrance surface between the vertex of that surface and a point considered; Delta phi a small variation in phi ; Delta uf the line part in the entrance surface perpendicular to the generatrix and comprised in the angle Delta phi ; Delta u''f the corresponding line part in the exit surface, while, in addition, the device is provided with means for projecting a distorted image on the entrance surface of the fiber optical array and means for urging a photographic film against the exit surface.
Claim 2
Independent Claim
181 words
A device for compensating cylindrical distortion in panoramic aerial recordings comprising a fiber optical array consisting of a large number of parallel light conducting fibers optically insulated one from another, which array has an elongated active cross-section and end surfaces having mutually parallel generatrices, one of the end surfaces (the entrance surface) being concave and arcuate and the other end surface (the exit surface) being convex and complying with the formula: in which r the radius of curvature of the entrance surface; phi the scanning angle, this is the angle subtended by the arc in the entrance surface between the vertex of that surface and a point considered; Delta phi a small variation in phi ; Delta uf the line part in the entrance surface perpendicular to the generatrix and comprised in the angle Delta phi ; Delta u''f the corresponding line part in the exit surface, while, in addition, the device is provided with means for projecting a distorted image on the entrance surface of the fiber optical array and means for urging a photographic film against the exit surface.
Claim 3
Dependent Claim
30 words
A panoramic camera comprising the device of claim 1, and having the fiber optical array so arranged that its entrance surface coincides with the focal surface of the camera objective.
Claim 4
Dependent Claim
89 words
The combination set forth in claim 1 comprising a scanning device for picking up infra-red radiation from a scene bEneath an aeroplane, a light source, means to form a light spot from the light source, means to detect the infra-red radiation and to provide an electric output signal which modulates said light source in accordance with the intensity of the radiation detected and means to move the modulated light spot in a circular path and to project said light spot onto the entrance surface of said fiber optical array.
Claim 5
Dependent Claim
52 words
A system as set forth in claim 3 comprising means to intensity modulate the light spot as a function of the scanning angle phi , whereby vignetting which appears as a result of the different angles at which the fibers are cut at both end surfaces, is completely or partly compensated for.
References Cited (Backward Citations)
US3187627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |