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US4377613A
Expired / Lapsed
US
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Non-iridescent glass structures
Assignee: Individual
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Filing: 1981-09-14
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Granted: 1983-03-22
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Expires: 2001-09-14
Abstract
Abstract This disclosure describes transparent glass window structures of the type bearing a coating of infra-red reflective material which is advantageously less than about 0.85 microns in thickness and wherein the observance of iridescence resulting from such a reflective coating is markedly reduced by provision of a very thin coating system beneath said infra-red reflective coating. The thin coating system forms means to reflect and refract light to interfere with the observation of iridescence. A particular advantage of the invention is the ability of the thin coating system to be coated in a fraction of time presently required to coat anti-iridescent interlayers of the prior art.
Inventors
- 👤 Roy G. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:09
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3435; C03C17/3417; C03C17/3482; G; G02; G02B; G02B5/00; G02B5/20; G02B5/208; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
In a non-iridescent, transparent, sheet structure of the type comprising (A) a transparent substrate, (B) an infra-red reflective coating and (C) an iridescence-suppressing interlayer means between said substrate and infra-red-reflective coating, the improvement whereby said structure comprises, between said infra-red-reflective coating and said transparent substrate, an interlayer comprising (1) a first interlayer component of relatively high refractive index material, nearer to said substrate; (2) over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and (3) the combined interlayer components for said iridescence-suppressing means having a total optical thickness of about 1/6th of a 500 nanometer design wavelength.
Claim 2
Dependent Claim
105 words
In a non-iridescent, transparent, sheet structure of the type comprising (A) a transparent substrate, (B) an infra-red reflective coating and (C) an iridescence-suppressing interlayer means between said substrate and infra-red-reflective coating, the improvement whereby said structure comprises, between said infra-red-reflective coating and said transparent substrate, an interlayer comprising (1) a first interlayer component of relatively high refractive index material, nearer to said substrate; (2) over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and (3) the combined interlayer components for said iridescence-suppressing means having a total optical thickness of about 1/6th of a 500 nanometer design wavelength.
Claim 3
Dependent Claim
23 words
A structure as defined in claim 1 wherein said infra-red-reflective coating and said first interlayer components are of about the same refractive index.
Claim 4
Dependent Claim
21 words
A structure as defined in claim 2 wherein said infra-red-reflective coating and said first interlayer component are both tin-oxide base coatings.
Claim 5
Dependent Claim
27 words
A structure as defined in claim 1 wherein said first interlayer component is of a refractive index substantially higher than the refractive index of the infra-red-reflective coating.
Claim 6
Dependent Claim
27 words
A structure as defined in claim 1 wherein said first interlayer component is of a refractive index substantially lower than the refractive index of the infra-red-reflective coating.
Claim 7
Dependent Claim
27 words
A structure as defined in claim 1 wherein said interlayer components are of refractive indices intermediate between the refractive index of the substrate and the infra-red-reflective coating.
Claim 8
Dependent Claim
128 words
A structure as defined in claim 1 wherein said optical thickness d 1 of said interlayer component closer to the substrate is about (1/720) cos.sup.-1 [(r.sub.1.sup.2 +r.sub.2.sup.2 -r.sub.3.sup.2)/2r.sub.1 r.sub.2 ] wherein said optical thickness d 1 of said interlayer closer to the infra-red reflective layer is about (1/720) cos -1 [(r 2 2 +r 3 3 -r 1 2 )/2r 2 r 3 ] for a design wavelength of 500 nanometers and wherein r.sub.1 =(n.sub.1 -n.sub.g)/(n.sub.1 +n.sub.g) r.sub.2 =(n.sub.1 -n.sub.2)/(n.sub.1 +n.sub.2) r.sub.3 =(n.sub.c -n.sub.2)/(n.sub.c +n.sub.2) and wherein n g =refractive index of the substrate n 1 =refractive index of the interlayer closer to the substrate n 2 =refractive index of the interlayer closer to the functional semiconductor coating, and n c =refractive index of the infra-red reflective coating.
Claim 9
Dependent Claim
44 words
A structure as defined in any of claims 1, 2, 3, 4, 5, 6 or 7 wherein said refractive indices and optical thicknesses of said substrate, said interlayer components and said infra-red-reflective coating are selected to provide a color saturation value below about 12.
Claim 10
Dependent Claim
45 words
A structure as defined in any of claims 1, 2, 3, 4, 5, 6 or 7 wherein said refractive indices and optical thicknesses of said substrate, said interlayer components and said infra-red reflective coating are selected to provide a color saturation value below about 8.
Claim 11
Dependent Claim
31 words
A structure as defined in claims 1, 2, 3, 4, 5, 6 or 7 which is free from any metallic component or colored component which functions primarily to absorb visible light.
Claim 12
Dependent Claim
106 words
In a non-iridescent, transparent, sheet structure of the type comprising (A) a transparent substrate; (B) an electrically conductive coating and (C) an iridescence-suppressing interlayer means between said substrate and electrically conductive coating, the improvement whereby said structure comprises, between said conductive coating and said transparent substrate, an interlayer comprising (1) a first interlayer component of relatively high refractive index material, nearer to said substrate; (2) over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and (3) the combined interlayer components for said iridescence-suppressing means having a total optical thickness of about 1/6th of a 500 nanometer design wavelength.
Claim 13
Dependent Claim
106 words
In a non-iridescent, transparent, sheet structure of the type comprising (A) a transparent substrate; (B) an electrically conductive coating and (C) an iridescence-suppressing interlayer means between said substrate and electrically conductive coating, the improvement whereby said structure comprises, between said conductive coating and said transparent substrate, an interlayer comprising (1) a first interlayer component of relatively high refractive index material, nearer to said substrate; (2) over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and (3) the combined interlayer components for said iridescence-suppressing means having a total optical thickness of about 1/6th of a 500 nanometer design wavelength.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |