Heat reflecting film with low visible reflectance
First Claim
1. A heat reflective composite comprising in series:
- (a) a first substrate having an index of refraction; and
(b) a heat reflective stack disposed upon the first substrate, the heat reflective stack comprising;
(1) a first interference layer;
(2) an infrared reflecting metal layer deposited onto the first interference layer;
(3) a second interference layer; and
(4) a first non-infrared reflective layer deposited onto the second interference layer, the first non-infrared reflective layer being composed of a material selected from the group of materials consisting of (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0 and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5.
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Accused Products
Abstract
The invention is a heat reflecting transparent window cover having three layers. The composite has a substrate and a unique heat reflective stack disposed upon the substrate. The heat reflective stack has, in series, a first interference layer, an infrared reflecting metal layer, a second interference layer and a first non-infrared reflective layer. The first interference layer has an index of refraction which differs from the index of refraction of the substrate by at least about 0.1. The first non-infrared reflective layer is composed of the material from one of the following groups of materials: (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0, and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5.
117 Citations
26 Claims
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1. A heat reflective composite comprising in series:
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(a) a first substrate having an index of refraction; and
(b) a heat reflective stack disposed upon the first substrate, the heat reflective stack comprising;
(1) a first interference layer;
(2) an infrared reflecting metal layer deposited onto the first interference layer;
(3) a second interference layer; and
(4) a first non-infrared reflective layer deposited onto the second interference layer, the first non-infrared reflective layer being composed of a material selected from the group of materials consisting of (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0 and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A heat reflective product comprising in series:
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(a) a first layer of glass;
(b) a first substrate having an index of refraction;
(c) a heat reflective stack, the heat reflective stack comprising;
(1) a first interference layer having an index of refraction which differs from the index of refraction of the substrate by at least about 0.1;
(2) an infrared reflecting metal layer deposited onto the first interference layer;
(3) a second interference layer; and
(4) a first non-infrared reflective layer deposited onto the second interference layer, the first non-infrared reflective layer being composed of a material selected from the group of materials consisting of (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0 and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5; and
(d) a second substrate.
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24. A solar reflective product comprising in series:
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(a) a first layer of glass;
(b) a first layer of polyvinylbutyral;
(c) a first substrate having an index of refraction;
(d) a heat reflective stack disposed upon the first substrate, the heat reflective stack comprising;
(1) a first interference layer having an index of refraction which differs from the index of refraction of the substrate by at least about 0.1;
(2) an infrared reflecting metal layer deposited onto the first interference layer;
(3) a second interference layer; and
(4) a first non-infrared reflective layer deposited onto the second interference layer, the first non-infrared reflective layer being composed of a material selected from the group of materials consisting of (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0 and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5;
(e) a second layer of polyvinylbutyral; and
(f) a second layer of glass.
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25. A heat reflective product comprising in series:
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(a) a first layer of glass;
(b) a first substrate having an index of refraction;
(c) a heat reflective stack disposed upon the first substrate, the heat reflective stack comprising;
(1) a first interference layer having an index of refraction which differs from the index of refraction of the substrate by at least about 0.1;
(2) an infrared reflecting metal layer deposited onto the first interference layer;
(3) a second interference layer; and
(4) a first non-infrared reflective layer deposited onto the second interference layer, the first non-infrared reflective layer being composed of a material selected from the group of materials consisting of (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0 and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5; and
(d) a second layer of glass;
wherein the first layer of glass is spaced apart from the first substrate and the second layer of glass is spaced apart from the first non-infrared reflective layer.
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26. A heat reflective product comprising in series:
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(a) a first layer of glass;
(b) a heat reflective stack disposed upon the first substrate, the heat reflective stack comprising;
(1) a first interference layer having an index of refraction which differs from the index of refraction of the substrate by at least about 0.1;
(2) an infrared reflecting metal layer deposited onto the first interference layer;
(3) a second interference layer; and
(4) a first non-infrared reflective layer deposited onto the second interference layer, the first non-infrared reflective layer being composed of a material selected from the group of materials consisting of (i) metals having an index of refraction greater than about 1.0 and an extinction coefficient greater than about 2.0 and (ii) non-metals having an index of refraction greater than about 0.5 and an extinction coefficient greater than about 0.5; and
(c) a second layer of glass;
wherein the second layer of glass is spaced-apart from the first non-infrared reflective layer.
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Specification