Solar control layered coating for glass windows
First Claim
1. A solar control glass coating having a substantially neutral visible reflected color, comprising:
- a first layer of dielectric material,a second layer, of partially reflective metallic material,a third layer, of dielectric material,a fourth layer, of partially reflective metallic material.a fifth layer, of dielectric material, andeach of said first, third and fifth dielectric layers consisting of a substantially transparent dielectric material having a refractive index within a range of from 1.7 to 2.7, said first and firth layers having substantially the same optical thickness that is substantially within a range of 33-45 percent of the optical thickness of said third layer, one of said second or fourth layers has a thickness substantially within the range of from 75 to less than 100 percent of the other of the second or fourth layer.
6 Assignments
0 Petitions
Accused Products
Abstract
A five-layer coating, commonly called a "stack", for glass windows in order to control the proportion of solar radiation permitted to pass through the window, the remainder being reflected by the coating, while maintaining a desired visible light characteristic transmission. Particularly, the technique is applied to vehicle glass windows, such as truck and automobile windshields, where the amount of solar radiation allowed to pass into the vehicle through the window is minimized within the constraints of maintaining visible light transmission above a certain legal level. The characteristics of the coating are also selected for visible light reflected from the window to the outside to be a substantially neutral color, highly desirable for the overall appearance of trucks and automobiles.
123 Citations
15 Claims
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1. A solar control glass coating having a substantially neutral visible reflected color, comprising:
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a first layer of dielectric material, a second layer, of partially reflective metallic material, a third layer, of dielectric material, a fourth layer, of partially reflective metallic material. a fifth layer, of dielectric material, and each of said first, third and fifth dielectric layers consisting of a substantially transparent dielectric material having a refractive index within a range of from 1.7 to 2.7, said first and firth layers having substantially the same optical thickness that is substantially within a range of 33-45 percent of the optical thickness of said third layer, one of said second or fourth layers has a thickness substantially within the range of from 75 to less than 100 percent of the other of the second or fourth layer. - View Dependent Claims (8, 9, 10, 11, 12, 15)
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2. A vehicle windshield made of at least one sheet of glass with a solar control coating attached to it, wherein the entire structure has a visible transmission of from 70 to 73 percent of light incident upon it within a weighted Illuminant A weighted visible wavelength distribution and has a substantially neutral reflective visible light color, said coating comprising:
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a first layer, of dielectric material, a second layer, of partially reflective metallic material, a third layer, of dielectric material, a fourth layer, of partially reflective metallic material, a fifth layer, of dielectric material, each of said first, third and fifth dielectric layers being made of a substantially transparent dielectric material having a refractive index within a range of from 1.7 to 2.7, said first and fifth layers having substantially the same optical thickness that is substantially within a range of 33-45 percent of the optical thickness of said third layer, and said fourth layer being substantially within the range of from 65 to 85 percent of the thickness of said second layer. - View Dependent Claims (13)
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3. A vehicle windshield made of at least one sheet of glass with a solar control coating attached to it, wherein the entire structure has a visible transmission of from 75 to 77 percent of light incident upon it within a weighted Illuminate A weighted visible wavelength distribution and has a substantially neutral reflective visible light color, said coating comprising:
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a first layer, of dielectric material, a second layer, of partially reflective metallic material, a third layer, of dielectric material. a fourth layer, of partially reflective metallic material, a fifth layer, of dielectric material, and each of said first, third and fifth dielectric layers being made of a substantially transparent dielectric material having a refractive index within a range of from 1.7 to 2.7, said first and fifth layers having substantially the same optical thickness that is substantially within a range of 33-45 percent of the optical thickness of said third layer, one of said second or fourth layers has a thickness substantially within the range of from 75 to less than 100 percent of the other second or fourth layer.
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4. A laminated vehicle windshield structure, comprising:
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a first sheet of glass, forming an outside of the windshield structure, a solar control coating, including, a first layer of dielectric material, a second layer, of partially reflective metallic material, a third layer, of dielectric material, a fourth layer, of partially reflective metallic material, a fifth layer, of dielectric material, each of said first, third and fifth dielectric layers being made of a substantially transparent dielectric material having a refractive index within a range of from 1.7 to 2.7, said first and fifth layers having substantially the same optical thickness that is substantially within a range of 33-45 percent of the optical thickness of said third layer, and either of the second or fourth layers being substantially within the range of from 65 to 85 percent of the thickness of the other, a laminant material layer, and a second glass sheet forming an inside of the windshield structure.
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5. A solar control glass coating having a substantially neutral visible reflected color, comprising:
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a first layer, of dielectric material, a second layer, of partially reflective metallic material, a third layer, of dielectric material, a fourth layer, of partially reflective metallic material, a fifth layer, of dielectric material, and each of said first, third and fifth dielectric layers consisting of a substantially transparent dielectric material having a refractive index within the range of from 1.7 to 2.7, said first and fifth layers having substantially the same optical thickness that is substantially within the range of 33-45 percent of the optical thickness of said third layer, one of said second or fourth layers has a thickness substantially within the range of from 65 to 85 percent of the other of the second or fourth layer.
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6. A vehicle windshield made of at least one sheet of glass with a solar control coating attached to it, wherein the entire structure has a visible transmission of from 75 to 77 percent of light incident upon it within a weighted Illuminant A weighted visible wavelength distribution and has a substantially neutral reflective visible light color, said coating comprising:
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a first layer, of dielectric material, a second layer, of partially reflective metallic material, a third layer, of dielectric material, a fourth layer, of partially reflective metallic material, a fifth layer, of dielectric material, and each of said first, third and fifth dielectric layers consisting of a substantially transparent dielectric material having a refractive index within the range of from 1.7 to 2.7, said first and fifth layers having substantially the same optical thickness that is substantially within the range of 33-45 percent of the optical thickness of said third layer, one of said second or fourth layers has a thickness substantially within the range of from 65 to 85 percent of the other of the second or fourth layer.
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7. The combination according to any one of claims wherein the optical thickness of the first and fifth layers is less than 40 percent of the optical thickness of said third layer.
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14. A combination of window glass and a solar control coating, said coating comprising:
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a first layer, of substantially optically transparent dielectric material, a second layer, of partially reflective metallic material, a third layer, of substantially optically transparent dielectric material, a fourth layer, of partially reflective metallic material, a fifth layer, of substantially optically transparent dielectric material, and said first and fifth layers each having an optical thickness that is less than about forty percent of the optical thickness of said third layer, and one of said second and fourth layers having a thickness that is one of said second or fourth layers has a thickness substantially within the range of from 65 to 85 percent than that of the other of the second or fourth layer, said layer thicknesses being adjusted to result in the combination having a transmission of about seventy percent or more of light within an Illuminant A weighted visible wavelength distribution and a substantially neutral reflective visible light color.
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Specification