US3641353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam bolometer
Assignee: Westinghouse Electric Corp
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Filing: 1970-08-17
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Granted: 1972-02-08
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Expires: 1990-08-17
Abstract
Abstract A bolometer which operates at room temperature and which can be made sensitive to all blackbody radiation in the visible spectrum and extending into the infrared, depending upon the nature of a faceplate used. The bolometer is constructed by sandwiching a suitable semiconductor in smoke form between gold black as one electrode and a flooding electron beam as the other, the sensing layer being mounted in a vacuum tube.
Inventors
- 👤 Francis X Mcnally
- 👤 Louis Chiosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:58
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/28; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/458
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
In a radiation pickup device, an evacuated envelope, means including a cathode at one end of said envelope for generating a flooding electron beam, a target electrode at the other end of said envelope and in the path of said flooding electron beam, said target electrode including a film of semiconductive material whose electrical conductivity characteristics change in response to heat and having a first side flooded by said electron beam, a layer of gold black smoke deposited on the other side of said film of semiconductive material, and means including a source of potential and a load impedance connected in series between said cathode and said layer of gold black smoke, the arrangement being such that upon exposure of the gold black smoke to incident radiation heat will be generated to heat the semiconductive film and change its conductivity characteristics whereby current flowing through the semiconductive film will be vaRied with the flooding electron beam acting as one electrode for the semiconductive film and the gold black smoke layer acting as the other electrode.
Claim 2
Dependent Claim
175 words
In a radiation pickup device, an evacuated envelope, means including a cathode at one end of said envelope for generating a flooding electron beam, a target electrode at the other end of said envelope and in the path of said flooding electron beam, said target electrode including a film of semiconductive material whose electrical conductivity characteristics change in response to heat and having a first side flooded by said electron beam, a layer of gold black smoke deposited on the other side of said film of semiconductive material, and means including a source of potential and a load impedance connected in series between said cathode and said layer of gold black smoke, the arrangement being such that upon exposure of the gold black smoke to incident radiation heat will be generated to heat the semiconductive film and change its conductivity characteristics whereby current flowing through the semiconductive film will be vaRied with the flooding electron beam acting as one electrode for the semiconductive film and the gold black smoke layer acting as the other electrode.
Claim 3
Dependent Claim
34 words
The radiation pickup device of claim 1 wherein said film of semiconductive material has a thickness of about 10 microns and said layer of gold black smoke has a thickness of about 1 micron.
Claim 4
Dependent Claim
32 words
The radiation pickup device of claim 1 wherein said gold black smoke layer is deposited on a second film of semiconductive material which, in turn, is deposited on a substrate heat sink.
Claim 5
Dependent Claim
25 words
The radiation pickup device of claim 1 wherein said film of semiconductive material is selected from the group consisting of As2Se3, In2Te3, Sb2S3 and Sb2Se3.
Claim 6
Dependent Claim
16 words
The radiation pickup device of claim 3 wherein said second film of semiconductive material comprises Sb2S3.
Claim 7
Dependent Claim
17 words
The radiation pickup device of claim 1 wherein said film of semiconductive material is in smoke form.
References Cited (Backward Citations)
US3517246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |