US4451119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite mirror and method of construction
Assignee: Eastman Kodak Co
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Filing: 1981-04-02
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Granted: 1984-05-29
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Expires: 2001-04-02
Abstract
Abstract A preferred embodiment of a composite mirror comprises (1) a substrate of carbon-carbon, (2) intermediate layers of silicon carbide, silicon dioxide, (3) optically polished layers of metals and/or suitable glass (ultralow-expansion or modified fused-silica glass) and (4) an optical coating of high reflectivity. The resulting mirror exhibits desired features including high optical quality and a low coefficient of thermal expansion; such mirrors being well suited to high thermal flux applications. Methods of producing the composite mirror are described.
Inventors
- 👤 John J. Meyers
- 👤 John C. Pulver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/0816; G02B5/085; G02B5/0858
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
14 words
A mirror comprising a carbon-carbon substrate supporting an adherent optical coating of high reflectivity.
Claim 2
Dependent Claim
14 words
A mirror comprising a carbon-carbon substrate supporting an adherent optical coating of high reflectivity.
Claim 3
Dependent Claim
16 words
A mirror as set forth in claim 1 wherein said carbon-carbon substrate comprises three-dimensional woven carbon.
Claim 4
Dependent Claim
21 words
A mirror as set forth in claim 1 wherein said optical coating comprises a metal cladding having an optically reflective surface.
Claim 5
Dependent Claim
20 words
A mirror as set forth in claim 1 wherein said optical coating comprises a glass having an optically reflective surface.
Claim 6
Dependent Claim
23 words
A mirror for high thermal energy applications comprising: (a) a carbon-carbon substrate; and (b) a high reflectivity optical coating bonded to said substrate.
Claim 7
Dependent Claim
23 words
A mirror for high thermal energy applications comprising: (a) a carbon-carbon substrate; and (b) a high reflectivity optical coating bonded to said substrate.
Claim 8
Dependent Claim
16 words
A mirror as set forth in claim 5 wherein said carbon-carbon substrate comprises three-dimensional woven carbon.
Claim 9
Dependent Claim
21 words
A mirror as set forth in claim 5 wherein said optical coating comprises a metal cladding having an optically reflective surface.
Claim 10
Dependent Claim
20 words
A mirror as set forth in claim 5 wherein said optical coating comprises a glass having an optically reflective surface.
Claim 11
Dependent Claim
28 words
A mirror for high thermal energy application comprising: (a) a carbon-carbon substrate; (b) an optical coating of high reflectivity; (c) means adhering said optical coating to said substrate.
Claim 12
Dependent Claim
28 words
A mirror for high thermal energy application comprising: (a) a carbon-carbon substrate; (b) an optical coating of high reflectivity; (c) means adhering said optical coating to said substrate.
Claim 13
Dependent Claim
38 words
A mirror for high thermal energy applications comprising: (a) a woven three-dimensional carbon-carbon composite substrate; (b) a layer of glass supported by said substrate; and (c) a layer of material of high reflectivity adhered to said layer glass.
Claim 14
Dependent Claim
38 words
A mirror for high thermal energy applications comprising: (a) a woven three-dimensional carbon-carbon composite substrate; (b) a layer of glass supported by said substrate; and (c) a layer of material of high reflectivity adhered to said layer glass.
Claim 15
Dependent Claim
20 words
A mirror as set forth in claim 10 further comprising means for adhering said layer of glass to said substrate.
Claim 16
Dependent Claim
23 words
A mirror as set forth in claim 10 further comprising a layer of silicon carbide adhering said layer of glass to said substrate.
Claim 17
Dependent Claim
19 words
A mirror as set forth in claim 10 wherein said layer of glass comprises a layer of ultra-low-expansion glass.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |