US5103099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for linear detection of radiation
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1990-10-17
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Granted: 1992-04-07
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Expires: 2010-10-17
Abstract
Abstract A device for linear detection of radiation includes at least one thin plate (2) of a dense scintillating material, placed parallel to the direction of the beam of the radiation, the beam penetrating the plate by its edge beam, the plate having a sufficient depth in the direction of the beam to stop the major part of the radiation which has penetrated there, and at least one group of fluorescent optical fibers (4), which can be excited by the visible light emitted by the material under the impact of the radiation, these fibers having portions (6) which are parallel, adjacent and attached to one of the two faces of the plate so that these portions are parallel to the direction of the beam, thus making possible locating, along the edge of the plate, the impact of the particles of the radiation. The device has applications in medical imagery and in parts and luggage inspection.
Inventors
- 👤 Michel Bourdinaud
- 👤 Michel Laguesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:23
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T5/00; G01T5/08; G01V; G01V5/00; G01V5/20
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
140 words
Device for detection of a radiation beam, which comprises: at least one thin plate of a dense scintillating material, at least one group of fluorescent optical fibers, which can be excited by visible light emitted by the scintillating material under the impact of radiation, these fibers having portions which are parallel, adjacent and attached to one of the two faces of the plate, and means for collimation of the beam, for imposing on the beam an orientation parallel to the plate and to said portions of the fibers so that said beam penetrates the plate by the edge of the latter, this plate having a sufficient depth to stop the major part of the radiation which has penetrated there, the device thus making possible locating, along the edge of the plate, the impact of the particles of the incident radiation.
Claim 2
Dependent Claim
140 words
Device for detection of a radiation beam, which comprises: at least one thin plate of a dense scintillating material, at least one group of fluorescent optical fibers, which can be excited by visible light emitted by the scintillating material under the impact of radiation, these fibers having portions which are parallel, adjacent and attached to one of the two faces of the plate, and means for collimation of the beam, for imposing on the beam an orientation parallel to the plate and to said portions of the fibers so that said beam penetrates the plate by the edge of the latter, this plate having a sufficient depth to stop the major part of the radiation which has penetrated there, the device thus making possible locating, along the edge of the plate, the impact of the particles of the incident radiation.
Claim 3
Dependent Claim
129 words
Device for detection of a radiation beam, which comprises: at least one thin plate of a dense scintillating material, at least one group of fluorescent optical fibers, which can be excited by the visible light emitted by the scintillating material under the impact of radiation, these fibers having portions which are parallel, adjacent and attached to one of the two faces of the plate, and means for displacement of said plate relative to the incident beam, this plate having a sufficient depth to stop the major part of the radiation which has penetrated the plate through its edge, the device thus making possible locating, along the edge of the plate, the impact of the particles of the incident radiation and forming a bidimensional detector due to the relative displacement.
Claim 4
Dependent Claim
129 words
Device for detection of a radiation beam, which comprises: at least one thin plate of a dense scintillating material, at least one group of fluorescent optical fibers, which can be excited by the visible light emitted by the scintillating material under the impact of radiation, these fibers having portions which are parallel, adjacent and attached to one of the two faces of the plate, and means for displacement of said plate relative to the incident beam, this plate having a sufficient depth to stop the major part of the radiation which has penetrated the plate through its edge, the device thus making possible locating, along the edge of the plate, the impact of the particles of the incident radiation and forming a bidimensional detector due to the relative displacement.
Claim 5
Dependent Claim
141 words
Device for detection of a radiation beam, which comprises: at least one thin plate of a dense scintillating material, this plate having a sufficient depth to stop the major part of the radiation which has penetrated the plate through its edge, at least one group of fluorescent optical fibers, which can be excited by the visible light emitted by the scintillating material under the impact of the radiation, these fibers having portions which are parallel, adjacent and attached to one of the two faces of the plate, for each fiber, a means for detection of the light of fluorescence produced and guided by this fiber when it is excited, and electronic means for processing signals provided by the detection means, the device thus making possible locating, along the edge of the plate, the impact of the particles of the incident radiation.
Claim 6
Dependent Claim
141 words
Device for detection of a radiation beam, which comprises: at least one thin plate of a dense scintillating material, this plate having a sufficient depth to stop the major part of the radiation which has penetrated the plate through its edge, at least one group of fluorescent optical fibers, which can be excited by the visible light emitted by the scintillating material under the impact of the radiation, these fibers having portions which are parallel, adjacent and attached to one of the two faces of the plate, for each fiber, a means for detection of the light of fluorescence produced and guided by this fiber when it is excited, and electronic means for processing signals provided by the detection means, the device thus making possible locating, along the edge of the plate, the impact of the particles of the incident radiation.
Claim 7
Dependent Claim
31 words
Device according to claim 3, wherein the other face of the plate is made reflective or diffusing for the light emitted by the scintillating material under the impact of the radiation.
Claim 8
Dependent Claim
23 words
Device according to claim 3, which comprises thin plates of scintillating material, which frame the unit formed by said portions of the fibers.
Claim 9
Dependent Claim
45 words
Device according to claim 3, which comprises two groups of fluorescent optical fibers, the unit formed by said portions of fibers of one of the groups and the unit formed by said portions of fibers of the other group framing the plate of scintillating material.
Claim 10
Dependent Claim
27 words
Device according to claim 6, wherein said portions of one of the units are placed in a zigzag fashion relative to said portions of the other unit.
Claim 11
Dependent Claim
16 words
Device according to claim 3, wherein said plate of the scintillating material has an isotropic structure.
Claim 12
Dependent Claim
42 words
Device according to claim 3, wherein said plate of scintillating material is able to guide the visible light which is emitted by the scintillating material under the impact of the radiation, in a way approximately perpendicular to the faces of the plate.
Claim 13
Dependent Claim
70 words
Device according to claim 9, wherein said plate of scintillating material has a structure of pillars, wherein these pillars are oriented perpendicularly to the face of the plate, are placed in parallel rows and are above to guide the visible light emitted by the scintillating material under the impact of the radiation and wherein said portions of the fibers are placed parallel to these rows and perpendicular to the pillars.
Claim 14
Dependent Claim
12 words
Device according to claim 3, wherein the dense scintillating material is inorganic.
Claim 15
Dependent Claim
16 words
Device according to claim 11, wherein the dense scintillating material has a base of cesium iodide.
Claim 16
Dependent Claim
40 words
A device according to claim 3, wherein: the spatial resolution of the location along the edge of the thin plate is a function of the thickness of the thin plate, and more detailed spatial resolution is obtained with thinner plates.
Claim 17
Dependent Claim
42 words
A device according to claim 3, wherein: the thickness of said at least one thin plate is roughly equal to the diameter of the optical fibers, thereby providing a spatial resolution which is approximately equal to the diameter of the optical fibers.
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) | 1995-04-07 | 1995-10-07 | 1996-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-07 | 1999-10-07 | 2000-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-07 | 2003-10-07 | 2004-04-07 | $7700.00 | Window Closed / Lapsed |