Patent US3873834A successfully refreshed from Google Patents.
US3873834A
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Method of producing three-dimensional images from a series of individual images in different perspectives
Assignee: US Philips Corp
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Filing: 1972-01-20
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Granted: 1975-03-25
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Expires: 1992-01-20
Abstract
Abstract A method of tomographic recording wherein a plurality of views of an object are recorded by moving an x-ray source to a number of different locations about a circle, exposing a separate x-ray recording medium corresponding to each position of the x-ray source and superimposing the recorded images on a common viewing plane with incoherent radiation as a superimposed image. Movement of the viewing plane to different positions with relation to the recorded image permits the viewing of different planes of the object tomographically from a single set of exposures.
Inventors
- 👤 Hans Dammann
- 👤 Manfred Kock
- 👤 Ulf Tiemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:14
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/025; G; G03; G03B; G03B35/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A method for producing a three-dimensional image comprising the steps of separately recording a plurality of views of an object by projecting a first cone of radiation through said object from different perspective viewpoints along a planar circular path on a plurality of planar recording mediums arranged parallel to the plane of the circle, arranging the recordings in the positions they occupied during the recording process and projecting with a further cone of incoherent radiation all the recordings in a superimposed manner on a common area of a viewing plane arranged parallel to the recordings and at selected distances therefrom, said further cone of radiation being the reverse of said first cone of radiation, whereby different planes of said recorded object may be selectively viewed from said plurality of recording mediums.
Claim 2
Independent Claim
131 words
A method for producing a three-dimensional image comprising the steps of separately recording a plurality of views of an object by projecting a first cone of radiation through said object from different perspective viewpoints along a planar circular path on a plurality of planar recording mediums arranged parallel to the plane of the circle, arranging the recordings in the positions they occupied during the recording process and projecting with a further cone of incoherent radiation all the recordings in a superimposed manner on a common area of a viewing plane arranged parallel to the recordings and at selected distances therefrom, said further cone of radiation being the reverse of said first cone of radiation, whereby different planes of said recorded object may be selectively viewed from said plurality of recording mediums.
Claim 3
Dependent Claim
35 words
A method as claimed in claim 1, wherein the step of recording comprises recording the internal as well as the external details of the object, and wherein the viewing plane comprises a ground glass plate.
Claim 4
Dependent Claim
38 words
A method as claimed in claim 1, wherein the step of projecting each recording comprises the step of stroboscopically and sequentially illuminating each recording in a sequence sufficiently rapid to produce the illusion of a still three-dimensional image.
Claim 5
Dependent Claim
64 words
A method as claimed in claim 1, wherein the step of projecting each recording comprises the steps of rotating an incoherent point source of light about a circular path, rotating a disc containing the recordings about a further circular path, the rotational axes of the two circular paths being parallel, and projecting the radiation from the point source through the recordings with a lens.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 1, wherein the step of projecting each recording comprises simultaneously projecting incoherent radiation from a plurality of apparent radiation sources arranged in a circle through the recordings.
Claim 7
Dependent Claim
39 words
A method as claimed in claim 5, wherein the step of simultaneously projecting incoherent radiation through the recordings comprises the step of projecting the incoherent radiation through a ring of imaging lenses each optically aligned with a separate recording.
Claim 8
Dependent Claim
31 words
A method as claimed in claim 5, wherein the step of projecting illumination from a plurality of point sources further comprises projecting said radiation through a plurality of contrast enhancing diaphragms.
Claim 9
Dependent Claim
31 words
A method as claimed in claim 1, wherein the step of projecting each recording on a common area of a viewing plane comprises the step of simultaneously superimposing the projected images.
Claim 10
Dependent Claim
43 words
A method as claimed in claim 1, wherein the step of recording comprises exposing the object to x-rays from a source and moving the source to a plurality of spatially separated positions whereby a plurality of views of an object may be recorded.
References Cited (Backward Citations)
US1390250A
Cited
US2730566A
Cited
US3091692A
Cited
US2948822A
Cited
US3560740A
Cited
US3499146A
Cited
US3614426A
Cited
US3576997A
Cited
US3742236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |