US4383728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon coated infra red reflectors
Assignee: ANDERSON MELVER L JR
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Filing: 1980-11-14
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Granted: 1983-05-17
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Expires: 2000-11-14
Abstract
Abstract Reflectors of infra red radiation are used in infra red (thermal) imager systems to scan and reflect thermal radiation onto detectors. In this invention the highly reflecting surfaces of the reflectors, e.g. mirrors and rotating prisms, are coated with a thin infra red transparent layer of glassy diamond-like carbon. The carbon layer may be formed directly on the surface or an initial thin bonding layer, e.g. of silicon or germanium, may be deposited on the reflecting surface followed by the carbon layer. Both the bonding layer and carbon layer may be deposited by a glow discharge technique.
Inventors
- 👤 Alan H. Litington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:09
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/09; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3605; C03C17/3615; C03C17/3634; C03C17/3636; C03C17/3644; C03C17/3649; C03C17/3652; C03C17/3657; G02B5/20; G02B5/208
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
An infra red reflector comprising a substrate having a highly reflecting surface covered with a thin layer of glassy carbon that is substantially transparent to infra red radiation, with a high abrasion resistance and chemical durability.
Claim 2
Dependent Claim
36 words
An infra red reflector comprising a substrate having a highly reflecting surface covered with a thin layer of glassy carbon that is substantially transparent to infra red radiation, with a high abrasion resistance and chemical durability.
Claim 3
Dependent Claim
17 words
A reflector according to claim 1 wherein the carbon layer is deposited directly onto the reflecting surface.
Claim 4
Dependent Claim
26 words
A reflector according to claim 1 wherein a thin bonding layer of infra red transmitting material is arranged between the reflecting surface and the carbon layer.
Claim 5
Dependent Claim
15 words
A reflector according to claim 3 wherein the bonding layer is a layer of silicon.
Claim 6
Dependent Claim
15 words
A reflector according to claim 3 wherein the bonding layer is a layer of germanium.
Claim 7
Dependent Claim
20 words
A reflector according to claim 1 wherein the highly reflecting surface is formed by a coating on the substrate surface.
Claim 8
Dependent Claim
14 words
A reflector according to claim 6 wherein the coating is a layer of silver.
Claim 9
Dependent Claim
14 words
A reflector according to claim 6 wherein the coating is a layer of aluminium.
Claim 10
Dependent Claim
25 words
A reflector according to claim 1 wherein the substrate comprises a multifaces drum arranged for rotation about an axis for scanning an infra red image.
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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |