US5399869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phoswich detectors having optical filter for controlling pulse height and rise time of output from scintillator
Assignee: Japan Atomic Energy Agency
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Filing: 1993-10-07
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Granted: 1995-03-21
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Expires: 2013-10-07
Abstract
Abstract A phoswich detector having two or more scintillators is disclosed, in which at least one optical filter is provided between the scintillator farthest from a photomultiplier and the scintillator nearest to the photomultiplier. The detector is capable of reducing the pulse height of signal from the scintillator to an arbitrary level and extending the rise time of the pulse to some extent.
Inventors
- 👤 Shigekazu Usuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:54
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2008
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
A phoswich detector comprising two or more scintillators, in which an optical filter is provided between two of the scintillators.
Claim 2
Dependent Claim
20 words
A phoswich detector comprising two or more scintillators, in which an optical filter is provided between two of the scintillators.
Claim 3
Dependent Claim
25 words
A phoswich detector as claimed in claim 1, wherein said optical filter functions to reduce the transmittance of scintillation emitted from one of the scintillators.
Claim 4
Dependent Claim
22 words
A phoswich detector as claimed in claim 2, wherein said optical filter is an ND filter or a gold-coated polyethylene terephthalate film.
Claim 5
Dependent Claim
34 words
A phoswich detector as claimed in claim 1, wherein said optical filter functions to reduce the transmittance of the light in the shorter wavelength side of the scintillation emitted from one of the scintillators.
Claim 6
Dependent Claim
24 words
A phoswich detector as claimed in claim 4, wherein said optical filter has a threshold transmission wavelength of from about 360 to 480 nm.
Claim 7
Dependent Claim
16 words
A phoswich detector as claimed in claim 4, wherein said optical filter is a sharp-cut filter.
Claim 8
Dependent Claim
39 words
A phoswich detector comprising two or more scintillators, at least one optical filter and a photomultiplier, wherein said at least one optical filter is provided between the scintillator farthest from the photomultiplier and the scintillator nearest to the photomultiplier.
Claim 9
Dependent Claim
39 words
A phoswich detector comprising two or more scintillators, at least one optical filter and a photomultiplier, wherein said at least one optical filter is provided between the scintillator farthest from the photomultiplier and the scintillator nearest to the photomultiplier.
Claim 10
Dependent Claim
57 words
A phoswich detector as claimed in claim 7, wherein said at least one optical filter constitutes means for reducing the transmittance of the scintillation emitted from the scintillator farthest from the photomultiplier and means for reducing the transmittance of the light in the shorter wavelength side of the scintillation emitted from the scintillator farthest from the photomultiplier.
Claim 11
Dependent Claim
33 words
A phoswich detector in accordance with claim 7, wherein said at least one optical filter comprises a means for reducing the transmittance of scintillation emitted from the scintillator farthest from the photomultiplier tube.
Claim 12
Dependent Claim
24 words
A phoswich detector according to claim 9, wherein said at least one optical filter is an ND filter or a gold-coated polyethylene terephthalate film.
Claim 13
Dependent Claim
40 words
A phoswich detector according to claim 7, wherein said at least one optical filter constitutes means for reducing the transmittance of the light in the shorter wave-length side of the scintillation emitted from the scintillator farthest from the photomultiplier tube.
Claim 14
Dependent Claim
26 words
A phoswich detector according to claim 11, wherein said at least one optical filter has a threshold transmission wave-length of from about 360 to 480 nm.
Claim 15
Dependent Claim
19 words
A phoswich detector in accordance with claim 11, wherein said at least one optical filter is a sharp-cut filter.
References Cited (Backward Citations)
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US3967122A
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US3892971A
Cited
JPS60188869A
Cited
JPH0247890A
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US4958080A
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US5149971A
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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) | 1998-03-20 | 1998-09-19 | 1999-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-20 | 2002-09-19 | 2003-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-20 | 2006-09-19 | 2007-03-21 | $7700.00 | Window Closed / Lapsed |