US4131794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent X-ray spectrometer
Assignee: US Philips Corp
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Filing: 1976-11-22
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Granted: 1978-12-26
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Expires: 1996-11-22
Abstract
Abstract A location-sensitive detector which can be read on-line is included in a fluorescent X-ray spectrometer comprising an analyzing crystal. Thus, the analysis result can be directly displayed and recorded without a film density measurement being required. For the detector use can be made of, for example, a gas-filled counter comprising a properly defined collector wire, a solid-state detector consisting of a row of detection elements, or a high-pressure camera which comprises electrodes which are constructed to be selective.
Inventors
- 👤 Edward Bruninx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:12
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/02; G; G01; G01N; G01N23/00; G01N23/22; G01N23/223; G01N2223/00; G01N2223/07; G01N2223/076
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A fluorescent X-ray spectrometer for analyzing a specimen, comprising an X-ray source, a radiation detector and an analyzing crystal which comprises side faces and end faces, said analyzing crystal being arranged so that wavelength dispersion occurs and X-radiation of a given wavelength coincides at least substantially with a line transversely to the dispersion direction of the detector, said radiation detector being rigidly arranged in the spectrometer and being readable in a location-dependent and on-line manner, said X-ray source being located so as to direct X-rays to said specimen to produce fluorescent radiation and said analyzing crystal being located so that at least a said end face is exposed to and diffracts said fluorescent radiation, said radiation detector receiving said radiation from said analyzing crystal.
Claim 2
Dependent Claim
124 words
A fluorescent X-ray spectrometer for analyzing a specimen, comprising an X-ray source, a radiation detector and an analyzing crystal which comprises side faces and end faces, said analyzing crystal being arranged so that wavelength dispersion occurs and X-radiation of a given wavelength coincides at least substantially with a line transversely to the dispersion direction of the detector, said radiation detector being rigidly arranged in the spectrometer and being readable in a location-dependent and on-line manner, said X-ray source being located so as to direct X-rays to said specimen to produce fluorescent radiation and said analyzing crystal being located so that at least a said end face is exposed to and diffracts said fluorescent radiation, said radiation detector receiving said radiation from said analyzing crystal.
Claim 3
Dependent Claim
24 words
A fluorescent X-ray spectrometer as in claim 1, wherein said end face of said analyzing crystal extends parallel to crystal faces of the crystal.
Claim 4
Dependent Claim
37 words
A fluorescent X-ray spectrometer as in claim 1, wherein a comparatively small part of a surface of said analyzing crystal which extends transversely to the crystal faces of said crystal can be irradiated by said fluorescent radiation.
Claim 5
Dependent Claim
42 words
A fluorescent X-ray spectrometer as in claim 1, wherein that portion of said analyzing crystal irradiated by said fluorescent radiation is curved so that diffracted radiation of a given wavelength is incident on the detector in an at least substantially line-shaped focus.
Claim 6
Dependent Claim
25 words
A fluorescent X-ray spectrometer as in claim 1, wherein said detector consists of a row of solid state detector elements which can be separately read.
Claim 7
Dependent Claim
38 words
A fluorescent X-ray spectrometer as in claim 1, wherein said detector is constructed as an ionization chamber, which is bent through approximately 90° and contains a collector wire having a predetermined resistance and capacitance per unit of length.
Claim 8
Dependent Claim
36 words
A fluorescent X-ray spectrometer as in claim 1, wherein said detector consists of a high-pressure ionization chamber, bent through approximately 90°, whose potential field, generated by the radiation, can be externally detected in a location-dependent manner.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |