Patent US1795699A successfully refreshed from Google Patents.
US4748645A
Expired / Lapsed
US
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Device for producing X-ray pictures of bodies
Assignee: Heimann GmbH
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Filing: 1983-08-10
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Granted: 1988-05-31
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Expires: 2003-08-10
Abstract
Abstract X-ray pictures of bodies are produced by a point X-ray source by providing measuring points in a linear detector array for the local intensity of the X-rays; their measured values control the brightness in picture elements of a monitor. All embodiments of the linear detector array deviating from a circular arc about the X-ray generator result in nonlinear distortion. The nonlinear distortions are compensated by a corresponding arrangement of the measuring points. The invention can be used for checking any object.
Inventors
- 👤 Gerhard Donges
- 👤 Cornelius Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:17
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/04; G01N23/043
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
225 words
Device for producing X-ray pictures of bodies, comprising a test channel in which the bodies can be moved; an X-ray generator disposed in the channel; a linear detector array disposed at a side of the bodies facing away from the X-ray generator for measuring the intensity of the oncoming x-radiation, a device connected to said linear detection array for generating a picture composed of individual picture elements from measured values of the X-ray intensity fed thereto from the linear detection array, every picture element of the picture being adjusted in brightness in accordance with a respective measured value of the linear detector array, at least one measuring point at which a respective measured value is determined being spaced a distance from the X-ray generator which is different from that of others of said measuring points located adjacent said one measuring point in said detector array; each of said picture elements being spaced equally relative to the respective adjacent picture elements of the picture; and mutual spacings between two adjacent measuring points in the detector array being proportional to the product of the distance between one of said measuring points and the X-ray generator and the reciprocal value of the cosine of an angle between the incident X-ray and a perpendicular from the X-ray generator to a straight connecting line through the two adjacent measuring points.
Claim 2
Dependent Claim
225 words
Device for producing X-ray pictures of bodies, comprising a test channel in which the bodies can be moved; an X-ray generator disposed in the channel; a linear detector array disposed at a side of the bodies facing away from the X-ray generator for measuring the intensity of the oncoming x-radiation, a device connected to said linear detection array for generating a picture composed of individual picture elements from measured values of the X-ray intensity fed thereto from the linear detection array, every picture element of the picture being adjusted in brightness in accordance with a respective measured value of the linear detector array, at least one measuring point at which a respective measured value is determined being spaced a distance from the X-ray generator which is different from that of others of said measuring points located adjacent said one measuring point in said detector array; each of said picture elements being spaced equally relative to the respective adjacent picture elements of the picture; and mutual spacings between two adjacent measuring points in the detector array being proportional to the product of the distance between one of said measuring points and the X-ray generator and the reciprocal value of the cosine of an angle between the incident X-ray and a perpendicular from the X-ray generator to a straight connecting line through the two adjacent measuring points.
Claim 3
Dependent Claim
58 words
Device according to claim 1, including a plurality of said linear detector arrays; detectors included in the detector arrays having equal mutual spacings; and having unused detectors between the detectors used as measuring points for generating picture elements; and wherein the mutual distance between detectors used as measuring points is determined by an appropriate selection of the detectors.
Claim 4
Dependent Claim
33 words
Device according to claim 1, comprising at least one detector array disposed along all walls accessible to the X-rays after passing through the test space, and conformed to the shape of the walls.
Claim 5
Dependent Claim
88 words
Device according to claim 1, wherein the distance between the measuring points is selected according to the equation A.sub.i =A.sub.o r.sub.i /cos α.sub.i, wherein A i is the distance between adjacent measuring points D i , A o is a scale factor, r i is the distance from the X-ray generator to the measuring point D i , and the angle δ i is the angle between the X-ray incident to the measuring point and the perpendicular from the X-ray generator onto a line through adjacent measuring points.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |