Patent US5047642A successfully refreshed from Google Patents.
US5047642A
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Radioluminescent screen with an improved quality factor and spatial resolution for X or gamma photon imaging
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1990-10-11
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Granted: 1991-09-10
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Expires: 2010-10-11
Abstract
Abstract Radioluminescent screen with an improved quality factor and spatial resolution for X or gamma photon imaging having a transparent plate (2) made from a scintillating material cooperating with an image sensor (16) transforming the light photons produced in the scintillating plate (2) by X or gamma photons into currents supplying a video system, characterized in that the scintillating plate (2) has in its volume light deflecting lines (4) distributed in a direction perpendicular to the plane of the plate, in accordance with spacings equal to or smaller than those of the image points of the said plate.
Inventors
- 👤 Gaetan Pleyber
- 👤 Philippe Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:28
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2002; G01T1/202
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
Radioluminescent screen with an improved quality factor and spatial resolution for X or gamma photon imaging having a transparent plate (2) made from a scintillating material cooperating with an image sensor (16) transforming the light photons produced in the scintillating plate (2) by X or gamma photons into currents supplying a video system, characterized in that the scintillating plate (2) has in its volume light deflecting lines (4) distributed in a direction perpendicular to the plane of the plate, in accordance with spacings equal to or smaller than those of the image points brought to the format of said plate.
Claim 2
Dependent Claim
100 words
Radioluminescent screen with an improved quality factor and spatial resolution for X or gamma photon imaging having a transparent plate (2) made from a scintillating material cooperating with an image sensor (16) transforming the light photons produced in the scintillating plate (2) by X or gamma photons into currents supplying a video system, characterized in that the scintillating plate (2) has in its volume light deflecting lines (4) distributed in a direction perpendicular to the plane of the plate, in accordance with spacings equal to or smaller than those of the image points brought to the format of said plate.
Claim 3
Dependent Claim
29 words
Radioluminescent screen according to claim 1, characterized in that the light deflecting lines (4) are constituted by defects of a physical and/or chemical nature induced in the scintillating material.
Claim 4
Dependent Claim
23 words
Radioluminescent screen according to claim 1, characterized in that these light deflecting lines (4) are constituted by holes made in the scintillating material.
Claim 5
Dependent Claim
33 words
Radioluminescent screen according to any one of the claims 1 to 3, characterized in that the deflecting lines (4) are implanted in accordance with a regular matrix network in the scintillating material (2).
Claim 6
Dependent Claim
29 words
Radioluminescent screen according to any one of the claims 1 to 3, characterized in that the deflecting lines (4) are implanted in random manner in the scintillating material (2).
Claim 7
Dependent Claim
42 words
Radioluminescent screen according to any one of the claims 1 to 5 for improved optical coupling with the image sensor (16), characterized in that the output surface (6) of the scintillating plate (2) has reliefs in the manner of integrated lenses (12).
Claim 8
Dependent Claim
44 words
Radioluminescent screen according to any one of the claims 1 to 5 for improved optical coupling with the image sensor (16), characterized in that the output surface (6) of the scintillating plate (2) has reliefs such as in the form of a fluorescent film.
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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |