Patent US4949499A successfully refreshed from Google Patents.
Patent US4555626A successfully refreshed from Google Patents.
US4555626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation shield in light detector and/or assembly
Assignee: Mirion Technologies Capintec Inc
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Filing: 1982-08-03
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Granted: 1985-11-26
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Expires: 2002-08-03
Abstract
Abstract A radiation shield in a light detector and/or sensor assembly generally comprises a horizontally oriented buffer on which the detector is disposed, a vertically oriented radiation shield surrounding the detector, and a horizontally oriented collimating buffer disposed on the vertically oriented radiation shield above the detector. Advantages of the invention include minimization of the effect of radiation emitted from the hot junctions of a thermoelectric cooler employed in the detection assembly, and the provision of an electromagnetic shield when the arrangement is connected to the low-impedance side of the amplifying circuitry associated with the detector. The buffer preferably comprises a highly emissive material, while the collimating buffer is preferably of an electrically conductive material. Electromagnetic shielding can be provided by the use of high permeability material. Finally, the shield, buffer and collimating buffer may be insulated from the detector and thermoelectric cooling elements, and may be connected to a suitable point of amplifier circuitry associated with the assembly to minimize the effect of noise from the thermoelectric cooling device.
Inventors
- 👤 Arata Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:20
CPC Classifications
H; H05; H05K; H05K9/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
171 words
A radiation shield for use with a detector disposed in and defining a first horizontal plane, a thermoelectric cooler adapted to cool said detector, a case enclosing a volume of space about said detector and said cooler, a light-transmissive window in said case adapted to admit radiation into the enclosed volume and onto said detector, means for electrically coupling said detector and said cooler to respective external circuitry, said shield comprising: a first shield means being disposed in a second horizontal plane parallel to and vertically spaced from said detector and said first horizontal plane, and disposed within said enclosed volume, said first shield means having an opening therein to allow the radiation admitted through said light-transmissive window to impinge on said detector; a second shield means extending vertically between the first and second horizontal planes; and said first shield means having portions extending both inward and outward with respect to said detector and said second shield means; whereby to shield said detector from radiation not admitted through said light-transmissive window.
Claim 2
Dependent Claim
171 words
A radiation shield for use with a detector disposed in and defining a first horizontal plane, a thermoelectric cooler adapted to cool said detector, a case enclosing a volume of space about said detector and said cooler, a light-transmissive window in said case adapted to admit radiation into the enclosed volume and onto said detector, means for electrically coupling said detector and said cooler to respective external circuitry, said shield comprising: a first shield means being disposed in a second horizontal plane parallel to and vertically spaced from said detector and said first horizontal plane, and disposed within said enclosed volume, said first shield means having an opening therein to allow the radiation admitted through said light-transmissive window to impinge on said detector; a second shield means extending vertically between the first and second horizontal planes; and said first shield means having portions extending both inward and outward with respect to said detector and said second shield means; whereby to shield said detector from radiation not admitted through said light-transmissive window.
Claim 3
Dependent Claim
41 words
The shield of claim 1, including a third shield means disposed in a third horizontal plane below said detector and said first horizontal plane and being substantially flat, and said second shield extending vertically between said second and third horizontal planes.
Claim 4
Dependent Claim
19 words
The shield of claim 1, wherein said second shield means is a vertically disposed radiation shield surrounding said detector.
Claim 5
Dependent Claim
29 words
The shield of claim 3, wherein said detector is disposed on said third shield means and wherein said vertically disposed radiation shield is positioned on said third shield means.
Claim 6
Dependent Claim
18 words
The shield of claims 3 or 4, wherein said first shield means is a collimator to said radiation.
Claim 7
Dependent Claim
17 words
The shield of claim 1, wherein said first shield means is made of an electrically conductive material.
Claim 8
Dependent Claim
17 words
The shield of claim 2, wherein said third shield means is made of a highly emissive material.
Claim 9
Dependent Claim
19 words
The shield of claim 2, wherein said second and said third shield means is electrically insulated from the detector.
Claim 10
Dependent Claim
131 words
A detection assembly comprising: a radiation detector disposed in a first horizontal plane; thermoelectric cooler adapted to cool said detector; a case enclosing a volume of space about said detector and said cooler; a light-transmissive window in said case adapted to admit radiation into the enclosed volume and onto said detector; means for electrically coupling said detector and said cooler to respective external circuitry; a first shield means disposed within said enclosed volume in a second horizontal plane parallel to and vertically spaced from said detector and said first horizontal plane, said first shield means having an opening therein to allow radiation admitted through said light-transmissive window to impinge on said detector; and a second shield means disposed within said enclosed volume extending vertically between said first and second horizontal planes.
Claim 11
Dependent Claim
131 words
A detection assembly comprising: a radiation detector disposed in a first horizontal plane; thermoelectric cooler adapted to cool said detector; a case enclosing a volume of space about said detector and said cooler; a light-transmissive window in said case adapted to admit radiation into the enclosed volume and onto said detector; means for electrically coupling said detector and said cooler to respective external circuitry; a first shield means disposed within said enclosed volume in a second horizontal plane parallel to and vertically spaced from said detector and said first horizontal plane, said first shield means having an opening therein to allow radiation admitted through said light-transmissive window to impinge on said detector; and a second shield means disposed within said enclosed volume extending vertically between said first and second horizontal planes.
Claim 12
Dependent Claim
54 words
The detection assembly of claim 9, including a third shield means disposed in a third horizontal plane below said detector and said first horizontal plane and being substantially flat, and said second shield extending vertically between said second and third horizontal planes, and wherein said third shield means is electrically insulated from the detector.
Claim 13
Dependent Claim
18 words
The detection assembly of claim 10, wherein said third shield means is electrically insulated from the thermoelectric cooler.
Claim 14
Dependent Claim
42 words
The detection assembly of claim 10, including amplifier circuitry as part of said external circuitry connected to the coupling means and said detector, said first, second and third shield means being connected electrically to said amplifier circuitry, whereby to minimize noise effect.
Claim 15
Dependent Claim
28 words
A detection assembly as recited in claim 9, said thermoelectric cooler having a cold junction, and said third shield means disposed between said cold junction and said detector.
Claim 16
Dependent Claim
28 words
A detection assembly as recited in claim 9, wherein said first shield means is a collimator to said radiation and is disposed between said detector and said window.
Claim 17
Dependent Claim
28 words
A radiation shield as recited in claim 5, wherein said first, second and third shield means is made of a highly permeable material, whereby to provide electromagnetic shielding.
Claim 18
Dependent Claim
37 words
A radiation shield as recited in claim 5, said detector being coupled to amplification circuitry via said coupling means, wherein said first, second and third shield means are connected to said amplification circuitry, whereby to minimize noise.
Claim 19
Independent Claim
28 words
An apparatus as recited in claims 2 or 7, wherein said third shield means includes portions extending outwardly with respect to said detector beyond said second shield means.
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |