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US4772111A
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Optical mirror with c/c composite substrate and an intermediate layer of molydenum, tungsten, or niobium 40 to 100 μm thick
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1987-03-30
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Granted: 1988-09-20
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Expires: 2007-03-30
Abstract
Abstract An optical mirror in which a mirror surface formation material, e.g. aluminum, is coated on a substrate consisting of a c/c composite and having a predetermined shape. The coated mirror surface formation material layer is ultrahigh precision machined to a small thickness such that its deformation is suppressed by the substrate.
Inventors
- 👤 Hirofumi Shimura
- 👤 Yuji Enomoto
- 👤 Yusei Noguchi
- 👤 Yoshitaka Tatsue
- 👤 Hidenori Shinno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:42
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12625; Y10T428/12771; Y10T428/12806; Y10T428/12819; Y10T428/12826; Y10T428/12833; Y10T428/12993
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
An optical mirror, comprising: (i) a mirror substrate consisting of a c/c composite; (ii) an intermediate layer of molybdenum, tungsten or niobium formed on said mirror substrate in a thickness ranging from 40 to 100 μm; and (iii) a mirror surface forming material formed on said intermediate layer having a thickness of 500 to 1000 μm, said mirror surface forming material being cut and polished so that the resultant layer, having a mirror surface, has a thickness enabling said mirror substrate to suppress deformation of said resultant layer.
Claim 2
Dependent Claim
88 words
An optical mirror, comprising: (i) a mirror substrate consisting of a c/c composite; (ii) an intermediate layer of molybdenum, tungsten or niobium formed on said mirror substrate in a thickness ranging from 40 to 100 μm; and (iii) a mirror surface forming material formed on said intermediate layer having a thickness of 500 to 1000 μm, said mirror surface forming material being cut and polished so that the resultant layer, having a mirror surface, has a thickness enabling said mirror substrate to suppress deformation of said resultant layer.
Claim 3
Dependent Claim
20 words
The mirror of claim 1, wherein said c/c composite has fibers extending in the perpendicular direction of said mirror surface.
Claim 4
Dependent Claim
17 words
The mirror of claim 1, wherein said resultant layer has a thickness of 200 to 500 μm.
Claim 5
Dependent Claim
26 words
The mirror of claim 1, wherein the material of said mirror layer is an aluminum alloy, a copper alloy, tungsten, molybdenum, iridium, rhodium, gold or platinum.
Claim 6
Dependent Claim
87 words
An optical mirror, consisting essentially of: (i) a mirror substrate consisting of a c/c composite; (ii) an intermediate layer of molybdenum, tungsten or niobium formed on said mirror substrate to a thickness ranging from 40 to 100 μm; and (iii) a mirror surface formed on said intermediate layer having been cut and polished to a thickness such that the mirror layer has a thickness which enables the mirror substrate to suppress any deformation of the mirror layer resulting from the application of heat to said mirror layer.
Claim 7
Dependent Claim
87 words
An optical mirror, consisting essentially of: (i) a mirror substrate consisting of a c/c composite; (ii) an intermediate layer of molybdenum, tungsten or niobium formed on said mirror substrate to a thickness ranging from 40 to 100 μm; and (iii) a mirror surface formed on said intermediate layer having been cut and polished to a thickness such that the mirror layer has a thickness which enables the mirror substrate to suppress any deformation of the mirror layer resulting from the application of heat to said mirror layer.
Claim 8
Dependent Claim
20 words
The optical mirror of claim 5, wherein said mirror surface layer has a thickness ranging from 200 to 500 μm.
Claim 9
Dependent Claim
26 words
The optical mirror of claim 5, wherein said mirror surface layer, prior to being cut and polished, has a thickness ranging from 500 to 1000 μm.
Claim 10
Dependent Claim
115 words
A laminated structure capable of being cut and polished to an optical mirror product, consisting essentially of: (i) a mirror substrate consisting of a c/c composite; (ii) an intermediate layer of molybdenum, tungsten or niobium formed on said mirror substrate to a thickness ranging from 40 to 100 μm; and (iii) a mirror surface forming material formed on said intermediate layer having a thickness of 500 to 1000 μm, said mirror surface forming material capable of being cut and polished so that the resultant layer having a mirror surface has a thickness which enables said mirror substrate to suppress any deformation of the mirror layer resulting from the application of heat to said mirror layer.
Claim 11
Dependent Claim
115 words
A laminated structure capable of being cut and polished to an optical mirror product, consisting essentially of: (i) a mirror substrate consisting of a c/c composite; (ii) an intermediate layer of molybdenum, tungsten or niobium formed on said mirror substrate to a thickness ranging from 40 to 100 μm; and (iii) a mirror surface forming material formed on said intermediate layer having a thickness of 500 to 1000 μm, said mirror surface forming material capable of being cut and polished so that the resultant layer having a mirror surface has a thickness which enables said mirror substrate to suppress any deformation of the mirror layer resulting from the application of heat to said mirror layer.
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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |