Patent US3681606A successfully refreshed from Google Patents.
US3681606A
Expired / Lapsed
US
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Image intensifier using radiation sensitive metallic screen and electron multiplier tubes
Assignee: Bendix Corp
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Filing: 1969-04-10
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Granted: 1972-08-01
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Expires: 1989-04-10
Abstract
Abstract A radiation image intensifier having a metallic screen such as a lead screen to convert a radiation image into a corresponding electron image in combination with an electron multiplier array for amplifying the electron image.
Inventors
- 👤 Joseph Tinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:40
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/505; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J31/506; H01J31/507
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
22 words
A radiation image intensifier of claim 1 wherein said screen consists only of a metal having at least 13 electrons per atom.
Claim 2
Dependent Claim
30 words
A radiation image intensifier of claim 1 wherein said screen is composed of a metal selected from the group consisting of lead, uranium, tantalum, tungsten, gold, silver, osmium and iridium.
Claim 3
Dependent Claim
24 words
A radiation image intensifier of claim 1 wherein said utilization means is a photoanode for converting said electron image into a corresponding light image.
Claim 4
Dependent Claim
30 words
A radiation image intensifier of claim 1 wherein said screen is characterized by having a plurality of closely spaced surfaces which are oblique to the nominal plane of said screen.
Claim 5
Dependent Claim
18 words
A radiation image intensifier of claim 1 including a coating of a secondarily emissive material on said screen.
Claim 6
Dependent Claim
20 words
A radiation image intensifier of claim 6 further including a coating of a secondarily emissive material on said oblique surfaces.
Claim 7
Dependent Claim
165 words
A proximity focused radiation image intensifier including an evacuated chamber comprising: a screen comprising a metal having at least 13 electrons per atom adapted to receive a radiation image and to emit an electron image corresponding to said radiation image into said chamber at a predetermined energy level having an order of magnitude of approximately five to ten electron volts, said metal screen having a plane defining surface for receiving a radiation image and an electron emitting surface having a plurality of closely spaced surface portions that are oblique to said plane to maximize the electron emitting surface area of said screen; an array of a plurality of individual electron multiplier tubes being operative in response to electron images at said predetermined energy level positioned in said chamber proximate said screen to receive said electron image And provide an amplified electron image corresponding to said electron image emitted from said screen means; and utilization means positioned proximate said array for receiving said amplified electron image.
Claim 8
Dependent Claim
23 words
A radiation image intensifier of claim 8 wherein said screen means consists only of a metal having at least 13 electrons per atom.
Claim 9
Dependent Claim
31 words
A radiation image intensifier of claim 8 wherein said screen means consists only of a metal selected from the group consisting of lead, uranium, tantalum, tungsten, gold, silver, osmium and iridium.
Claim 10
Dependent Claim
24 words
A radiation image intensifier of claim 8 wherein said utilization means is a photoanode for converting said electron image into a corresponding light image.
Claim 11
Dependent Claim
20 words
A radiation image intensifier of claim 8 further including a coating of a secondarily emissive material on said oblique surfaces.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |