Transparent substrate comprising an antiglare coating
First Claim
1. A manufactured article, comprising:
- a transparent substrate;
an antireflection coating on at least one face of the transparent substrate, said antireflection coating made of a stack of thin layers of dielectric material having alternately high and low refractive indices, wherein the stack comprises, in succession;
a high-index first layer, having a refractive index n1 of between 1.8 and 2.2 and a geometrical thickness e1 of between 5 and 50 nm;
a low-index second layer, having a refractive index n2 of between 1.35 and 1.65 and a geometrical thickness e2 of between 5 and 50 nm;
a high-index third layer, having a refractive index n3 of between 1.8 and 2.2 and a geometrical thickness e3 of between 70 and 120 nm;
a low-index fourth layer, having a refractive index n4 of between 1.35 and 1.65 and a geometrical thickness e4 of at least 80 μ
m, wherein the antireflection stack uses, at least for its high-index third layer, silicon nitride or aluminium nitride to undergo a heat treatment of bending, toughening, or annealing.
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Accused Products
Abstract
A transparent substrate including an antireflection coating, made from a stack of thin layers of dielectric material having alternately high and low refractive indices. This stack includes a high-index first layer having a refractive index n, of between 1.8 and 2.2 and a geometrical thickness e1 of between 5 and 50 nm, a low-index second layer having a refractive index n2 of between 1.35 and 1.65 and a geometrical thickness e2 of between 5 and 50 nm, a high-index third layer having a refractive index n3 of between 1.8 and 2.2 and a geometrical thickness e3 of between 70 and 120 nm, and a low-index fourth layer having a refractive index n4 of between 1.35 and 1:65 and a geometrical thickness e4 of at least 80 nm.
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Citations
37 Claims
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1. A manufactured article, comprising:
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a transparent substrate;
an antireflection coating on at least one face of the transparent substrate, said antireflection coating made of a stack of thin layers of dielectric material having alternately high and low refractive indices, wherein the stack comprises, in succession;
a high-index first layer, having a refractive index n1 of between 1.8 and 2.2 and a geometrical thickness e1 of between 5 and 50 nm;
a low-index second layer, having a refractive index n2 of between 1.35 and 1.65 and a geometrical thickness e2 of between 5 and 50 nm;
a high-index third layer, having a refractive index n3 of between 1.8 and 2.2 and a geometrical thickness e3 of between 70 and 120 nm;
a low-index fourth layer, having a refractive index n4 of between 1.35 and 1.65 and a geometrical thickness e4 of at least 80 μ
m,wherein the antireflection stack uses, at least for its high-index third layer, silicon nitride or aluminium nitride to undergo a heat treatment of bending, toughening, or annealing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A manufactured article comprising:
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a transparent substrate;
an antireflection coating on at least one face of the transparent substrate having a stack of thin layers of dielectric material, wherein the stack comprises, in succession;
a high-index first layer, having a refractive index n1 of between 1.8 and 2.2 and a geometrical thickness e1 of between 5 and 50 nm;
a low-index second layer having a refractive index n2 of between 1.35 and 1.65 and a geometrical thickness e2 of between 5 and 50 rim;
a high-index third layer having a refractive index n3 of between 1.8 and 2.2 and a geometrical thickness e3 of between 70 and 120 nm;
a low-index fourth layer having a refractive index n4 of between 1.35 and 1.65 and a geometrical thickness e4 of at least 80 nm, wherein the stack is configured to reduce light reflection by at least 3% at an angle of incidence of between 50 and 70 degrees, and wherein the stack is configured to produce a colorimetric response of light reflection on a side where the stack of thin layers is provided such that corresponding a* and b* values in the (L*, a*, b*) colorimetry system are negative at an angle of incidence of between 50 and 70 degrees. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A manufactured article, comprising:
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a transparent substrate;
an antireflection coating on at least one face of the transparent substrate, said antireflection coating made of a stack of thin layers of dielectric material having alternately high and low refractive indices, wherein the stack comprises, in succession;
a high-index first layer, having a refractive index n1 of between 1.8 and 2.2 and a geometrical thickness e2 of between 5 and 50 nm;
a low-index second layer, having a refractive index n2 of between 1.35 and 1.65 and a geometrical thickness e2 of between 5 and 50 nm;
a high-index third layer, having a refractive index n3 of between 1.8 and 2.2 and a geometrical thickness e3 of between 70 and 120 nm;
a low-index fourth layer, having a refractive index n4 of between 1.35 and 1.65 and a geometrical thickness e4 of at least 80 nm, wherein the antireflection stack uses silicon nitride or aluminium nitride for at least one of the high-index layers to undergo a heat treatment of bending, toughening, or annealing.
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Specification