US4884290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of analyzing composition of optical fiber base material to be measured by radioactive rays
Assignee: Furukawa Electric Co Ltd
•
Filing: 1985-10-11
•
Granted: 1989-11-28
•
Expires: 2005-10-11
Abstract
Abstract A method of analyzing a composition of an optical fiber base material to be measured by radioactive rays, which comprises the steps of irradiating radioactive rays from a radiation generator to the composition containing a plurality of elements or the substance, emitting the transmitted rays of the base material to a plurality of single crystals to produce several types of transmitted rays of specific energy, and measuring the transmitted rays by a radiation detector to analyze the compositions of the constituent elements in the base material. Thus, this method can accurately and economically analyze the composition in response to the constituent elements of the composition and the thickness of the composition.
Inventors
- 👤 Junichi Tamura
- 👤 Ryoichi Hara
- 👤 Fumihiko Abe
- 👤 Hisashi Koaizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:07
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/083; G01N23/20; G01N23/207
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
A method of analyzing a composition of an optical fiber base material to be measured by x-rays, comprising the steps of: irradiating x-rays from a radiation generator to the base material contining a plurality of elements emitting x-rays from the base material along a line of passage, placing a plurality of single crystals so as to intersect said line of passage, and wherein each of said crystals is independently positioned with respect to each other, producing from each crystal an X-ray beam of specific energy, and measuring each X-ray beam of specific energy with a separate radiation detector for each single crystal to analyze the compositions of the plurality of elements in the base material.
Claim 2
Independent Claim
115 words
A method of analyzing a composition of an optical fiber base material to be measured by x-rays, comprising the steps of: irradiating x-rays from a radiation generator to the base material contining a plurality of elements emitting x-rays from the base material along a line of passage, placing a plurality of single crystals so as to intersect said line of passage, and wherein each of said crystals is independently positioned with respect to each other, producing from each crystal an X-ray beam of specific energy, and measuring each X-ray beam of specific energy with a separate radiation detector for each single crystal to analyze the compositions of the plurality of elements in the base material.
Claim 3
Dependent Claim
21 words
The method according to claim 1, wherein the base material is scanned by the irradiated x-rays as the x-rays are emitted.
Claim 4
Dependent Claim
45 words
The method according to claim 1, further including the steps of: diffracting, at the plurality of single crystals, the x-rays emitted from the base material to produce several beams of x-rays of specific energy; and directing the x-rays of specific energy to a radiation detector.
Claim 5
Dependent Claim
44 words
The method according to claim 1, wherein one single crystal of the plurality of single crystals is disposed to produce a desired energy which satisfies Laue diffraction conditions, and another single crystal is disposed to produce a desired energy which satisifes Bragg diffraction conditions.
Claim 8
Dependent Claim
32 words
The method according to claim 4, an energy spectral analysis of the emitted x-rays comprises sequentially producing Laue diffraction x-rays of said desired energy and Bragg diffraction x-rays of said desired energy.
Claim 9
Dependent Claim
35 words
The method according to claim 1, wherein an energy spectral analysis of the emitted x-rays comprises sequentially producing first Bragg diffraction x-rays of a desired energy and second Bragg diffraction x-rays of a desired energy.
Claim 10
Dependent Claim
33 words
The method according to claim 4, wherein an energy spectral analysis of the emitted x-rays comprises sequentially producing Bragg diffraction x-rays of a desired energy and Laue diffraction x-rays of a desired energy.
Claim 11
Dependent Claim
16 words
The method according to claim 1, wherein the base material is moved through the emitted x-rays.
Claim 12
Independent Claim
138 words
A method of analyzing a composition of an optical fiber base material to be measured by x-rays, comprising the steps of: irradiating x-rays from a radiation generator to the base material containing a plurality of elements, emitting x-rays from the base material along a line of passage, placing a plurality of single crystals so as to intersect said line of passage producing from each crystal an x-ray beam of specific energy which was formed due to Laue diffraction, and measuring the intensity of each x-ray of specific energy with a radiation detector corresponding to each crystal to analyze the compositions of the plurality of elements in the base material, wherein an energy spectral analysis of the emitted x-rays comprises sequentially producing first Laue diffraction x-rays of a desired energy and second Laue diffraction x-rays of a desired energy.
Claim 13
Independent Claim
138 words
A method of analyzing a composition of an optical fiber base material to be measured by x-rays, comprising the steps of: irradiating x-rays from a radiation generator to the base material containing a plurality of elements, emitting x-rays from the base material along a line of passage, placing a plurality of single crystals so as to intersect said line of passage producing from each crystal an x-ray beam of specific energy which was formed due to Laue diffraction, and measuring the intensity of each x-ray of specific energy with a radiation detector corresponding to each crystal to analyze the compositions of the plurality of elements in the base material, wherein an energy spectral analysis of the emitted x-rays comprises sequentially producing first Laue diffraction x-rays of a desired energy and second Laue diffraction x-rays of a desired energy.
Claim 14
Dependent Claim
45 words
The method according to claim 9, further including the steps of: diffracting, at the plurality of single crystals, the x-rays emitted from the base material to produce several beams of x-rays of specific energy; and directing the x-rays of specific energy to a radiation detector.
Claim 15
Dependent Claim
16 words
The method according to claim 9, wherein the base material is moved through the emitted x-rays.
Claim 16
Dependent Claim
16 words
The method according to claim 9, wherein the base material is scanned by the emitted x-rays.
References Cited (Backward Citations)
US3004163A
Cited
US3261911A
Cited
US3160747A
Cited
US3100261A
Cited
US3397312A
Cited
US3435220A
Cited
US3354308A
Cited
US3375369A
Cited
SU441488A1
Cited
US3832550A
Cited
US3944830A
Cited
US3956633A
Cited
US3904876A
Cited
US4317994A
Cited
US4472825A
Cited
US4567605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |