US3769059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray and gamma-ray scintillators and detector screens incorporating same
Assignee: Thales SA
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Filing: 1970-12-22
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Granted: 1973-10-30
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Expires: 1990-12-22
Abstract
Abstract An X-ray or gamma-ray scintillator comprising, on a substrate, an alkaline halide layer of fibrous structure having the needle form, with the needles perpendicular to the surface of the substrate, the scintillator being associated, in detector screens of image-intensifier tubes for X-ray or gamma-ray, with a photosensitive layer enshrouding said needles.
Inventors
- 👤 B Driard
- 👤 G Roziere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:00
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
A scintillator as claimed in claim 1 further comprising between said substrate and said fibrous alkaline halide luminescent layer, an intermediate layer made of a material which is transparent to x-rays or gamma-rays and which facilitates the bonding of said luminescent layer to said substrate.
Claim 2
Dependent Claim
26 words
A scintillator as claimed in claim 2, wherein said substrate is made of an insulating material and said intermediate layer is made of a metallic material.
Claim 3
Dependent Claim
34 words
A scintillator as claimed in claim 2, wherein said substrate is made of a metallic material and said intermediate layer is made of an insulating material such as an oxide of said metallic material.
Claim 4
Dependent Claim
30 words
A detector screen for X or gamma ray image-intensifier tubes, comprising a scintillator in accordance with claim 1 and a photo-sensitive layer deposited onto said luminescent layer of said scintillator.
Claim 5
Dependent Claim
15 words
A screen as claimed in claim 5 wherein said photo-sensitive layer is a photo-emissive layer.
Claim 6
Dependent Claim
15 words
A screen as claimed in claim 5 wherein said photosensitive layer is a photo-conductive layer.
Claim 7
Independent Claim
146 words
A method of producing a scintillator capable of emitting photons within the luminous radiation range when exposed to X or gamma ray comprising a substrate transparent for said X or gamma ray and a luminescent layer deposited onto said substrate, said luminescent layer being made of alkaline halides having a fibrous structure constituted by tapered bodies having their bases applied side by side onto said substrate and extending substantially perpendicularly beyond the surface of said substrate consisting in vaporizing said alkaline halide onto said substrate in an evacuated enclosure enclosing said substrate and said alkaline halide to be vaporized, said vaporization being made in several steps while said substrate is permanently cooled by cooling means disposed within said enclosure to provide cooling of the face of said substrate where no alkaline halide is deposited, thus assuming a temperature of said substrate never in excess of 150*C.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |