Patent US5281820A successfully refreshed from Google Patents.
US5281820A
Expired / Lapsed
US
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Radiation detector
Assignee: Hoechst AG
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Filing: 1991-07-03
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Granted: 1994-01-25
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Expires: 2011-07-03
Abstract
Abstract A detector for detecting invisible radiation and charged particles is composed of at least one radiation-absorbing panel and at least one optical waveguide arranged parallel to the surface of said panel and containing a fluorescent dyestuff. The luminescent light produced in the panel by the absorbed radiation is converted into a fluorescent radiation in the optical waveguide conducted to a photosensitive semiconductor component by total reflection and measured at that point.
Inventors
- 👤 Werner Groh
- 👤 Jochen Coutandin
- 👤 Peter Herbrechtsmeier
- 👤 Jurgen Theis
- 👤 Thomas Stehlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:52
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T5/00; G01T5/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A detector for detecting invisible radiation and charged particles comprising at least one radiation-absorbing panel and at least one optical waveguide arranged parallel to the surface of the panel, and wherein: (a) the at least one radiation-absorbing panel is a radiation-to-light converting material and is composed of a carrier material which is doped with a luminescent compound; (b) the at least one optical waveguide is a fiber; (c) the fiber is composed of a transparent polymer core and of a polymer cladding having a lower refractive index than the core material; (d) the fiber contains at least one fluorescent dyestuff; (e) the wavelength range emitted by the luminescent compounds of the at least one radiation-absorbing panel is overlapping with the wavelength range of the absorption of the fluorescent dyestuff; and (f) an end of the fiber is reflection-coated.
Claim 2
Dependent Claim
138 words
A detector for detecting invisible radiation and charged particles comprising at least one radiation-absorbing panel and at least one optical waveguide arranged parallel to the surface of the panel, and wherein: (a) the at least one radiation-absorbing panel is a radiation-to-light converting material and is composed of a carrier material which is doped with a luminescent compound; (b) the at least one optical waveguide is a fiber; (c) the fiber is composed of a transparent polymer core and of a polymer cladding having a lower refractive index than the core material; (d) the fiber contains at least one fluorescent dyestuff; (e) the wavelength range emitted by the luminescent compounds of the at least one radiation-absorbing panel is overlapping with the wavelength range of the absorption of the fluorescent dyestuff; and (f) an end of the fiber is reflection-coated.
Claim 3
Dependent Claim
29 words
A radiation detector as in claim 1 wherein the at least one optical waveguide includes a plurality of optical wavelengths arranged parallel to the at least one radiation-absorbing panel.
Claim 4
Dependent Claim
40 words
A radiation detector as in claim 1 wherein the at least one radiation-absorbing panel includes two radiation-absorbing panels with the panels arranged parallel to one another, and wherein the at least one optical waveguide is positioned between the parallel panels.
Claim 5
Dependent Claim
25 words
A radiation detector as in claim 3 wherein the at least one optical waveguide includes a plurality of optical waveguides positioned between the parallel panels.
Claim 6
Dependent Claim
27 words
A radiation detector as in claim 1 wherein the detector has a linear response over a wide range of photon energies from 5 keV to 1.1 MeV.
Claim 7
Dependent Claim
27 words
A radiation detector as in claim 1 wherein the detector has a linear response over a wide range of photon energies from 5 keV to 22.5 MeV.
Claim 8
Dependent Claim
93 words
A radiation detector as in claim 1 wherein the at least one radiation-absorbing panel includes a plurality of spaced apart radiation-absorbing panels arranged parallel to ne another and the at least one optical waveguide includes a plurality of optical waveguides positioned adjacent to each panel on one side of each panel, each radiation-absorbing panel and the adjacent optical waveguides on one side thereof forming a panel and waveguides unit, and metal sheets positioned between the panel and waveguides units, the metal sheets being formed of metal having an atomic number greater than 25.
Claim 9
Dependent Claim
22 words
A radiation detector as in claim 7 wherein the metal sheets are formed of metal having an atomic number greater than 40.
Claim 10
Dependent Claim
22 words
A radiation detector as in claim 7 wherein the metal sheets are formed of metal having an atomic number greater than 73.
Claim 11
Dependent Claim
133 words
A detector for detecting invisible radiation and charged particles comprising a radiation-absorbing sleeve and a bundle of optical waveguides arranged parallel to one another and within the sleeve, and wherein: (a) the radiation-absorbing sleeve is a radiation-to-light converting material and is composed of a carrier material which is doped with a luminescent compound; (b) the bundle of optical waveguides comprises a plurality of fibers; (c) the fibers are each composed of a transparent polymer core and of a polymer cladding having a lower refractive index than the core material; (d) each fiber contains at least one fluorescent dyestuff; (e) the wavelength range emitted by the luminescent compound of the radiation-absorbing sleeve is overlapping with the wavelength range of the absorption of the fluorescent dyestuff; and (f) an end of each fiber is reflection-coated.
Claim 12
Dependent Claim
133 words
A detector for detecting invisible radiation and charged particles comprising a radiation-absorbing sleeve and a bundle of optical waveguides arranged parallel to one another and within the sleeve, and wherein: (a) the radiation-absorbing sleeve is a radiation-to-light converting material and is composed of a carrier material which is doped with a luminescent compound; (b) the bundle of optical waveguides comprises a plurality of fibers; (c) the fibers are each composed of a transparent polymer core and of a polymer cladding having a lower refractive index than the core material; (d) each fiber contains at least one fluorescent dyestuff; (e) the wavelength range emitted by the luminescent compound of the radiation-absorbing sleeve is overlapping with the wavelength range of the absorption of the fluorescent dyestuff; and (f) an end of each fiber is reflection-coated.
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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) | 1997-01-24 | 1997-07-26 | 1998-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-24 | 2001-07-26 | 2002-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-24 | 2005-07-26 | 2006-01-25 | $7700.00 | Window Closed / Lapsed |