US4949367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray spectrometer having a doubly curved crystal
Assignee: US Philips Corp
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Filing: 1989-03-29
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Granted: 1990-08-14
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Expires: 2009-03-29
Abstract
Abstract An X-ray analysis crystal is also curved in a direction transverse to the dispersion direction to increase the radiation efficiency. As a result of this radiation diffracted at the crystal is focused towards a detector input. In order to ensure a non-deformable crystal surface the crystal is preferably bonded to a carrier having an adapted bonding profile.
Inventors
- 👤 Albert Huizing
- 👤 Cornelis P. G. M. Zegers
- 👤 Teunis J. A. Heijmans
- 👤 Maurits W. van Tol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:54
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/36; G01N; G01N23/00; G01N23/20; G01N23/207; G01N23/2076; G21; G21K; G21K1/00; G21K1/06; G21K2201/00; G21K2201/06; G21K2201/064
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
In an X-ray analysis apparatus comprising an X-ray source, a monochromator crystal curved in a dispersing direction in one of an elliptical shape and a first logarithmic spiral of curvature, an object holder; and an X-ray detector, the improvement comprising said monochromator being curved in a sagittal direction transverse to said dispensing direction, the curvature in said sagittal direction being circular with a varying radius of curvature measured in said dispersing direction.
Claim 2
Dependent Claim
72 words
In an X-ray analysis apparatus comprising an X-ray source, a monochromator crystal curved in a dispersing direction in one of an elliptical shape and a first logarithmic spiral of curvature, an object holder; and an X-ray detector, the improvement comprising said monochromator being curved in a sagittal direction transverse to said dispensing direction, the curvature in said sagittal direction being circular with a varying radius of curvature measured in said dispersing direction.
Claim 3
Dependent Claim
56 words
An X-ray analysis apparatus according to claim 1, wherein said curvature in said sagittal direction is defined by a curvature center located at a geometrical point, said geometrical point lying on a second logarithmic spiral, said second logarithmic spiral having a center coinciding with a center of the first spiral of curvature in said dispersing direction.
Claim 4
Dependent Claim
18 words
An X-ray analysis apparatus according to claim 2, wherein said monochromator crystal is bonded to a preformed carrier.
Claim 5
Dependent Claim
22 words
An X-ray analysis apparatus according to claim 3, wherein said monochromator crystal is bonded to said preformed carrier by a polyethene film.
Claim 6
Dependent Claim
22 words
An X-ray analysis apparatus according to claim 3, wherein said monochromator crystal is bonded to said preformed carrier by a UV-curing adhesive.
Claim 7
Dependent Claim
24 words
An X-ray analysis apparatus according to claim 3, wherein said monochromator crystal includes a crystal of one of Ge, Si, InSb, LiF and pentaerithritol.
Claim 8
Dependent Claim
18 words
An X-ray analysis apparatus according to claim 1, wherein said monochromator crystal is bonded to a preformed carrier.
Claim 9
Dependent Claim
22 words
An X-ray analysis apparatus according to claim 7, wherein said monochromator crystal is bonded to said preformed carrier by a polyethene film.
Claim 10
Dependent Claim
22 words
An X-ray analysis apparatus according to claim 7, wherein said monochromator crystal is bonded to said preformed carrier by a UV-curing adhesive.
Claim 11
Dependent Claim
24 words
An X-ray analysis apparatus according to claim 2, wherein said monochromator crystal includes a crystal of one of Ge, Si, InSb, LiF and pentaerithritol.
Claim 12
Dependent Claim
24 words
An X-ray analysis apparatus according to claim 1, wherein said monochromator crystal includes a crystal of one of Ge, Si, InSb, LiF and pentaerithritol.
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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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |