Patent US4835387A successfully refreshed from Google Patents.
US4835387A
Expired / Lapsed
US
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Radiation image read-out apparatus
Assignee: Fujifilm Holdings Corp
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Filing: 1985-06-05
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Granted: 1989-05-30
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Expires: 2005-06-05
Abstract
Abstract A radiation image read-out apparatus comprises a source for emitting stimulating rays for scanning a stimulable phosphor sheet carrying a radiation image stored therein, a photoelectric read-out means for detecting light emitted by the stimulable phosphor sheet when it is scanned by stimulating rays, and a reflection mirror positioned near a portion of the stimulable phosphor sheet where stimulating rays impinge thereupon for reflecting light emitted by the stimulable phosphor sheet towards the photoelectric read-out system. A member for absorbing the stimulating rays reflected by the stimulable phosphor sheet is positioned for insertion into and withdrawal from the space between the reflection mirror and the portion of the stimulable phosphor sheet where stimulating rays for scanning impinge upon the stimulable phosphor sheet.
Inventors
- 👤 Shigeru Saotome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:01
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/0281; G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2012; G01T1/2014; G03; G03C; G03C5/00; G03C5/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A radiation image read-out apparatus including a stimulating ray source for emitting stimulating rays for scanning a stimulable phosphor sheet carrying a radiation image stored therein, a photoelectric read-out means for guiding and photoelectrically detecting light emitted by said stimulable phosphor sheet when it is scanned by said stimulating rays, and a reflection mirror positioned in the vicinity of a portion of said stimulable phosphor sheet where said stimulating rays impinge upon said stimulable phosphor sheet, said reflection mirror reflecting said light emitted by said stimulable phosphor sheet towards said photoelectric read-out means, wherein the improvement comprises the provision of a stimulating ray absorbing member for absorbing the stimulating rays reflected by said stimulable phosphor sheet, said stimulating ray absorbing member being positioned for insertion into and withdrawal from the space between said reflection mirror and said portion of said stimulable phosphor sheet where said stimulating rays for scanning said stimulable phosphor sheet impinge upon said stimulable phosphor sheet.
Claim 2
Dependent Claim
159 words
A radiation image read-out apparatus including a stimulating ray source for emitting stimulating rays for scanning a stimulable phosphor sheet carrying a radiation image stored therein, a photoelectric read-out means for guiding and photoelectrically detecting light emitted by said stimulable phosphor sheet when it is scanned by said stimulating rays, and a reflection mirror positioned in the vicinity of a portion of said stimulable phosphor sheet where said stimulating rays impinge upon said stimulable phosphor sheet, said reflection mirror reflecting said light emitted by said stimulable phosphor sheet towards said photoelectric read-out means, wherein the improvement comprises the provision of a stimulating ray absorbing member for absorbing the stimulating rays reflected by said stimulable phosphor sheet, said stimulating ray absorbing member being positioned for insertion into and withdrawal from the space between said reflection mirror and said portion of said stimulable phosphor sheet where said stimulating rays for scanning said stimulable phosphor sheet impinge upon said stimulable phosphor sheet.
Claim 3
Dependent Claim
21 words
An apparatus as defined in claim 1 wherein said stimulating ray absorbing member is a plate-like member having a black surface.
Claim 4
Dependent Claim
37 words
An apparatus as defined in claim 1 wherein said stimulating ray absorbing member is inserted into and withdrawn from said space by use of a movement means for moving said stimulating ray absorbing member vertically or transversely.
Claim 5
Dependent Claim
30 words
An apparatus as defined in claim 1 wherein said stimulating ray absorbing member has a length approximately equal to the length of said stimulable phosphor sheet in the transverse direction.
References Cited (Backward Citations)
US4258264A
Cited
US4346295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |