US4299864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making visible light to far infrared transducer
Assignee: United States Department of the Army
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Filing: 1980-02-28
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Granted: 1981-11-10
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Expires: 2000-02-28
Abstract
Abstract A visible light absorbing and far infrared radiation emitting membrane is closed in an evacuated cell. The membrane consists of a thin insulating film coated with an optical black made from gold alloyed with a small percentage of nickel, copper or palladium. The gold alloy black is deposited in a soft vacuum inert except for a trace of oxygen.
Inventors
- 👤 Vincent T. Bly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:24
CPC Classifications
F; F41; F41J; F41J2/00; F41J2/02; G; G02; G02F; G02F2/00; G02F2/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A method of making a visible-to-infrared transducer including the steps of (a) preparing a thermally insulating film on the order of 500A thick on a supporting structure; (b) placing the film-structure combination in a soft inert vacuum with a trace of oxygen atmosphere; (c) depositing onto said film while in said atmosphere a layer of a radiation absorber to a density on the order of 80×10 -6 gm/cm 2 ; (d) removing said combination from said atmosphere; (e) mounting said combination in an air-tight housing; and (f) evacuating said housing.
Claim 2
Independent Claim
90 words
A method of making a visible-to-infrared transducer including the steps of (a) preparing a thermally insulating film on the order of 500A thick on a supporting structure; (b) placing the film-structure combination in a soft inert vacuum with a trace of oxygen atmosphere; (c) depositing onto said film while in said atmosphere a layer of a radiation absorber to a density on the order of 80×10 -6 gm/cm 2 ; (d) removing said combination from said atmosphere; (e) mounting said combination in an air-tight housing; and (f) evacuating said housing.
Claim 3
Dependent Claim
27 words
The method as recited in claim 1 wherein said radiation absorber is gold black with a trace of either copper black, nickel black, or palladium black therein.
References Cited (Backward Citations)
US3735137A
Cited
US4178514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |